./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations 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/mult-flipped-dist.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:27:06,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:27:06,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:27:06,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:27:06,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:27:06,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:27:06,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:27:06,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:27:06,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:27:06,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:27:06,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:27:06,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:27:06,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:27:06,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:27:06,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:27:06,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:27:06,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:27:06,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:27:06,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:27:06,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:27:06,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:27:06,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:27:06,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:27:06,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:27:06,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:27:06,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:27:06,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:27:06,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:27:06,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:27:06,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:27:06,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:27:06,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:27:06,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:27:06,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:27:06,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:27:06,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:27:06,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:27:06,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:27:06,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:27:06,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:27:06,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:27:06,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:27:06,875 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:27:06,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:27:06,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:27:06,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:27:06,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:27:06,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:27:06,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:27:06,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:27:06,878 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:27:06,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:27:06,879 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:27:06,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:27:06,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:27:06,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:27:06,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:27:06,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:27:06,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:27:06,880 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:27:06,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:27:06,880 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:27:06,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:27:06,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:27:06,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:27:06,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:27:06,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:27:06,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:27:06,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:27:06,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:27:06,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:27:06,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:27:06,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:27:06,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:27:06,882 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:27:06,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:27:06,882 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:27:06,882 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:27:07,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:27:07,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:27:07,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:27:07,110 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:27:07,110 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:27:07,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-08-30 19:27:08,077 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:27:08,256 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:27:08,256 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-08-30 19:27:08,260 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc2fc658d/0e6b0cc886364818af4c05f9430222c3/FLAG69b023b92 [2023-08-30 19:27:08,272 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc2fc658d/0e6b0cc886364818af4c05f9430222c3 [2023-08-30 19:27:08,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:27:08,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:27:08,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:27:08,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:27:08,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:27:08,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54463f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08, skipping insertion in model container [2023-08-30 19:27:08,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:27:08,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:27:08,412 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2135,2148] [2023-08-30 19:27:08,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:27:08,429 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:27:08,455 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2135,2148] [2023-08-30 19:27:08,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:27:08,469 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:27:08,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08 WrapperNode [2023-08-30 19:27:08,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:27:08,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:27:08,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:27:08,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:27:08,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,505 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-08-30 19:27:08,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:27:08,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:27:08,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:27:08,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:27:08,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,535 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:27:08,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:27:08,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:27:08,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:27:08,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (1/1) ... [2023-08-30 19:27:08,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:27:08,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:08,563 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 19:27:08,587 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 19:27:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:27:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:27:08,604 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:27:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:27:08,604 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:27:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:27:08,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:27:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:27:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:27:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:27:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:27:08,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:27:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:27:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:27:08,607 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 19:27:08,689 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:27:08,690 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:27:08,922 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:27:08,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:27:08,927 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:27:08,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:27:08 BoogieIcfgContainer [2023-08-30 19:27:08,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:27:08,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:27:08,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:27:08,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:27:08,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:27:08" (1/3) ... [2023-08-30 19:27:08,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8fa33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:27:08, skipping insertion in model container [2023-08-30 19:27:08,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:27:08" (2/3) ... [2023-08-30 19:27:08,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8fa33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:27:08, skipping insertion in model container [2023-08-30 19:27:08,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:27:08" (3/3) ... [2023-08-30 19:27:08,933 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2023-08-30 19:27:08,938 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:27:08,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:27:08,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:27:08,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:27:09,026 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:27:09,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2023-08-30 19:27:09,085 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2023-08-30 19:27:09,085 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:27:09,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 19:27:09,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2023-08-30 19:27:09,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 202 flow [2023-08-30 19:27:09,095 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:27:09,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 202 flow [2023-08-30 19:27:09,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 202 flow [2023-08-30 19:27:09,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 202 flow [2023-08-30 19:27:09,137 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-08-30 19:27:09,140 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:27:09,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 7/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 19:27:09,141 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-30 19:27:10,970 INFO L134 LiptonReduction]: Checked pairs total: 1312 [2023-08-30 19:27:10,970 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-30 19:27:10,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:27:10,983 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;@6b4cfd55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:27:10,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:27:10,989 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-08-30 19:27:10,989 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:27:10,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:10,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:10,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:10,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1620298547, now seen corresponding path program 1 times [2023-08-30 19:27:10,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:10,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466571089] [2023-08-30 19:27:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:10,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:11,434 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 19:27:11,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466571089] [2023-08-30 19:27:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466571089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:11,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 19:27:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259997465] [2023-08-30 19:27:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:11,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:27:11,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:27:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:27:11,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 181 [2023-08-30 19:27:11,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:11,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 181 [2023-08-30 19:27:11,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:11,572 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2023-08-30 19:27:11,572 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 19:27:11,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1602 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-30 19:27:11,579 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-08-30 19:27:11,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2023-08-30 19:27:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:27:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:27:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-30 19:27:11,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569060773480663 [2023-08-30 19:27:11,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-30 19:27:11,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-30 19:27:11,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:11,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-30 19:27:11,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,606 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 309 transitions. [2023-08-30 19:27:11,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2023-08-30 19:27:11,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:27:11,611 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-08-30 19:27:11,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-30 19:27:11,615 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-08-30 19:27:11,615 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-08-30 19:27:11,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:11,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:11,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:27:11,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:11,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -622319524, now seen corresponding path program 1 times [2023-08-30 19:27:11,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:11,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697678981] [2023-08-30 19:27:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:11,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:11,764 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 19:27:11,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697678981] [2023-08-30 19:27:11,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697678981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:11,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:11,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:27:11,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141345223] [2023-08-30 19:27:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:11,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:27:11,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:27:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:27:11,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:11,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:11,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:11,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:11,937 INFO L130 PetriNetUnfolder]: 486/764 cut-off events. [2023-08-30 19:27:11,937 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2023-08-30 19:27:11,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 764 events. 486/764 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3182 event pairs, 137 based on Foata normal form. 68/826 useless extension candidates. Maximal degree in co-relation 420. Up to 391 conditions per place. [2023-08-30 19:27:11,949 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 54 selfloop transitions, 5 changer transitions 2/62 dead transitions. [2023-08-30 19:27:11,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 62 transitions, 298 flow [2023-08-30 19:27:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:27:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:27:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 480 transitions. [2023-08-30 19:27:11,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-08-30 19:27:11,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 480 transitions. [2023-08-30 19:27:11,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 480 transitions. [2023-08-30 19:27:11,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:11,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 480 transitions. [2023-08-30 19:27:11,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,957 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 5 states and 480 transitions. [2023-08-30 19:27:11,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 62 transitions, 298 flow [2023-08-30 19:27:11,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 62 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:11,959 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 119 flow [2023-08-30 19:27:11,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-30 19:27:11,960 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-30 19:27:11,960 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 119 flow [2023-08-30 19:27:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:11,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:11,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:11,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:27:11,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:11,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1535831546, now seen corresponding path program 2 times [2023-08-30 19:27:11,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:11,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221399629] [2023-08-30 19:27:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:12,039 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 19:27:12,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:12,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221399629] [2023-08-30 19:27:12,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221399629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:12,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:27:12,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106892857] [2023-08-30 19:27:12,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:12,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:27:12,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:27:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:27:12,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-30 19:27:12,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:12,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-30 19:27:12,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:12,160 INFO L130 PetriNetUnfolder]: 469/738 cut-off events. [2023-08-30 19:27:12,160 INFO L131 PetriNetUnfolder]: For 864/985 co-relation queries the response was YES. [2023-08-30 19:27:12,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 738 events. 469/738 cut-off events. For 864/985 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3069 event pairs, 103 based on Foata normal form. 124/839 useless extension candidates. Maximal degree in co-relation 842. Up to 458 conditions per place. [2023-08-30 19:27:12,163 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 41 selfloop transitions, 5 changer transitions 5/54 dead transitions. [2023-08-30 19:27:12,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 311 flow [2023-08-30 19:27:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:27:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:27:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-08-30 19:27:12,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-08-30 19:27:12,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-08-30 19:27:12,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-08-30 19:27:12,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:12,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-08-30 19:27:12,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,168 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,168 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 119 flow. Second operand 4 states and 392 transitions. [2023-08-30 19:27:12,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 311 flow [2023-08-30 19:27:12,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 301 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:12,170 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 145 flow [2023-08-30 19:27:12,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-30 19:27:12,171 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-30 19:27:12,171 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 145 flow [2023-08-30 19:27:12,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:12,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:12,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:27:12,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:12,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1297497348, now seen corresponding path program 1 times [2023-08-30 19:27:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:12,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393500726] [2023-08-30 19:27:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:12,236 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 19:27:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393500726] [2023-08-30 19:27:12,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393500726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:12,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:12,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:27:12,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926374743] [2023-08-30 19:27:12,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:27:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:12,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:27:12,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:27:12,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:12,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:12,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:12,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:12,405 INFO L130 PetriNetUnfolder]: 623/1049 cut-off events. [2023-08-30 19:27:12,405 INFO L131 PetriNetUnfolder]: For 2754/2858 co-relation queries the response was YES. [2023-08-30 19:27:12,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1049 events. 623/1049 cut-off events. For 2754/2858 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5075 event pairs, 191 based on Foata normal form. 164/1201 useless extension candidates. Maximal degree in co-relation 1674. Up to 527 conditions per place. [2023-08-30 19:27:12,410 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 59 selfloop transitions, 6 changer transitions 6/73 dead transitions. [2023-08-30 19:27:12,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 73 transitions, 458 flow [2023-08-30 19:27:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:27:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:27:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2023-08-30 19:27:12,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532596685082873 [2023-08-30 19:27:12,411 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2023-08-30 19:27:12,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2023-08-30 19:27:12,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:12,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2023-08-30 19:27:12,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,414 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,415 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 145 flow. Second operand 5 states and 482 transitions. [2023-08-30 19:27:12,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 73 transitions, 458 flow [2023-08-30 19:27:12,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 449 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:12,418 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 200 flow [2023-08-30 19:27:12,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-30 19:27:12,419 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-30 19:27:12,419 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 200 flow [2023-08-30 19:27:12,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:12,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 19:27:12,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:12,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash -612746414, now seen corresponding path program 2 times [2023-08-30 19:27:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:12,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234732736] [2023-08-30 19:27:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:12,470 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 19:27:12,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234732736] [2023-08-30 19:27:12,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234732736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:12,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:12,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:27:12,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804116212] [2023-08-30 19:27:12,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:27:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:27:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:27:12,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-30 19:27:12,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:12,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-30 19:27:12,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:12,629 INFO L130 PetriNetUnfolder]: 839/1400 cut-off events. [2023-08-30 19:27:12,629 INFO L131 PetriNetUnfolder]: For 4717/5125 co-relation queries the response was YES. [2023-08-30 19:27:12,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 1400 events. 839/1400 cut-off events. For 4717/5125 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7425 event pairs, 349 based on Foata normal form. 284/1615 useless extension candidates. Maximal degree in co-relation 2061. Up to 835 conditions per place. [2023-08-30 19:27:12,636 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 48 selfloop transitions, 12 changer transitions 3/67 dead transitions. [2023-08-30 19:27:12,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 527 flow [2023-08-30 19:27:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:27:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:27:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 389 transitions. [2023-08-30 19:27:12,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537292817679558 [2023-08-30 19:27:12,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 389 transitions. [2023-08-30 19:27:12,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 389 transitions. [2023-08-30 19:27:12,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:12,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 389 transitions. [2023-08-30 19:27:12,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,640 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,640 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 200 flow. Second operand 4 states and 389 transitions. [2023-08-30 19:27:12,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 527 flow [2023-08-30 19:27:12,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 510 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:12,644 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 330 flow [2023-08-30 19:27:12,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-30 19:27:12,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-08-30 19:27:12,646 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 330 flow [2023-08-30 19:27:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:12,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:12,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 19:27:12,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:12,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1085629665, now seen corresponding path program 1 times [2023-08-30 19:27:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:12,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121211005] [2023-08-30 19:27:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:12,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:12,730 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 19:27:12,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:12,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121211005] [2023-08-30 19:27:12,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121211005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:12,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:12,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:27:12,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056903001] [2023-08-30 19:27:12,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:12,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:27:12,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:12,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:27:12,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:27:12,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-30 19:27:12,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:12,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-30 19:27:12,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:12,891 INFO L130 PetriNetUnfolder]: 880/1445 cut-off events. [2023-08-30 19:27:12,892 INFO L131 PetriNetUnfolder]: For 7838/8234 co-relation queries the response was YES. [2023-08-30 19:27:12,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 1445 events. 880/1445 cut-off events. For 7838/8234 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7323 event pairs, 317 based on Foata normal form. 241/1633 useless extension candidates. Maximal degree in co-relation 2369. Up to 1085 conditions per place. [2023-08-30 19:27:12,900 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 49 selfloop transitions, 8 changer transitions 10/71 dead transitions. [2023-08-30 19:27:12,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 661 flow [2023-08-30 19:27:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:27:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:27:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2023-08-30 19:27:12,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386740331491713 [2023-08-30 19:27:12,902 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2023-08-30 19:27:12,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2023-08-30 19:27:12,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:12,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2023-08-30 19:27:12,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,922 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,922 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 330 flow. Second operand 4 states and 390 transitions. [2023-08-30 19:27:12,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 661 flow [2023-08-30 19:27:12,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:12,927 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 379 flow [2023-08-30 19:27:12,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=379, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-30 19:27:12,928 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-08-30 19:27:12,928 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 379 flow [2023-08-30 19:27:12,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:12,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:12,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:12,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 19:27:12,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:12,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 477800932, now seen corresponding path program 3 times [2023-08-30 19:27:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659953845] [2023-08-30 19:27:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:12,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:12,991 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 19:27:12,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659953845] [2023-08-30 19:27:12,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659953845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:12,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:12,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:27:12,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313430640] [2023-08-30 19:27:12,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:12,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:27:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:27:12,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:27:13,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-30 19:27:13,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:13,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-30 19:27:13,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:13,190 INFO L130 PetriNetUnfolder]: 1052/1733 cut-off events. [2023-08-30 19:27:13,190 INFO L131 PetriNetUnfolder]: For 8779/9064 co-relation queries the response was YES. [2023-08-30 19:27:13,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7905 conditions, 1733 events. 1052/1733 cut-off events. For 8779/9064 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9211 event pairs, 307 based on Foata normal form. 169/1861 useless extension candidates. Maximal degree in co-relation 4650. Up to 894 conditions per place. [2023-08-30 19:27:13,199 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 65 selfloop transitions, 19 changer transitions 19/105 dead transitions. [2023-08-30 19:27:13,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 1055 flow [2023-08-30 19:27:13,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:27:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:27:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2023-08-30 19:27:13,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184162062615101 [2023-08-30 19:27:13,201 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2023-08-30 19:27:13,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2023-08-30 19:27:13,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:13,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2023-08-30 19:27:13,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,204 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,204 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 379 flow. Second operand 6 states and 563 transitions. [2023-08-30 19:27:13,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 1055 flow [2023-08-30 19:27:13,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 992 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-30 19:27:13,213 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 550 flow [2023-08-30 19:27:13,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-30 19:27:13,213 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-08-30 19:27:13,213 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 550 flow [2023-08-30 19:27:13,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:13,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:13,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 19:27:13,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:13,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1700934463, now seen corresponding path program 2 times [2023-08-30 19:27:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:13,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943921630] [2023-08-30 19:27:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:13,258 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 19:27:13,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:13,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943921630] [2023-08-30 19:27:13,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943921630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:13,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:13,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:27:13,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238754197] [2023-08-30 19:27:13,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:13,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:27:13,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:27:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:27:13,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-30 19:27:13,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 550 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:13,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-30 19:27:13,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:13,448 INFO L130 PetriNetUnfolder]: 1045/1689 cut-off events. [2023-08-30 19:27:13,449 INFO L131 PetriNetUnfolder]: For 10769/11037 co-relation queries the response was YES. [2023-08-30 19:27:13,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8448 conditions, 1689 events. 1045/1689 cut-off events. For 10769/11037 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8331 event pairs, 301 based on Foata normal form. 200/1824 useless extension candidates. Maximal degree in co-relation 7762. Up to 1238 conditions per place. [2023-08-30 19:27:13,459 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 60 selfloop transitions, 10 changer transitions 10/86 dead transitions. [2023-08-30 19:27:13,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 941 flow [2023-08-30 19:27:13,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:27:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:27:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-08-30 19:27:13,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-08-30 19:27:13,460 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-08-30 19:27:13,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-08-30 19:27:13,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:13,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-08-30 19:27:13,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,463 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,463 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 550 flow. Second operand 4 states and 392 transitions. [2023-08-30 19:27:13,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 941 flow [2023-08-30 19:27:13,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 904 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 19:27:13,475 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 580 flow [2023-08-30 19:27:13,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-08-30 19:27:13,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-08-30 19:27:13,476 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 580 flow [2023-08-30 19:27:13,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:13,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:13,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 19:27:13,477 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:13,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2003654564, now seen corresponding path program 4 times [2023-08-30 19:27:13,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565259408] [2023-08-30 19:27:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:13,536 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 19:27:13,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:13,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565259408] [2023-08-30 19:27:13,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565259408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:13,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:13,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:27:13,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767701809] [2023-08-30 19:27:13,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:13,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:27:13,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:27:13,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:27:13,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:13,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 580 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:13,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:13,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:13,720 INFO L130 PetriNetUnfolder]: 1002/1586 cut-off events. [2023-08-30 19:27:13,721 INFO L131 PetriNetUnfolder]: For 10884/11184 co-relation queries the response was YES. [2023-08-30 19:27:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8309 conditions, 1586 events. 1002/1586 cut-off events. For 10884/11184 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7449 event pairs, 364 based on Foata normal form. 184/1724 useless extension candidates. Maximal degree in co-relation 5291. Up to 1039 conditions per place. [2023-08-30 19:27:13,729 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 56 selfloop transitions, 12 changer transitions 20/90 dead transitions. [2023-08-30 19:27:13,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 90 transitions, 970 flow [2023-08-30 19:27:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:27:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:27:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2023-08-30 19:27:13,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523756906077348 [2023-08-30 19:27:13,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2023-08-30 19:27:13,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2023-08-30 19:27:13,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:13,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2023-08-30 19:27:13,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,734 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 580 flow. Second operand 5 states and 474 transitions. [2023-08-30 19:27:13,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 90 transitions, 970 flow [2023-08-30 19:27:13,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 935 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-30 19:27:13,751 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 597 flow [2023-08-30 19:27:13,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=597, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-30 19:27:13,751 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-08-30 19:27:13,752 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 597 flow [2023-08-30 19:27:13,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:13,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:13,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:27:13,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:13,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash 641514423, now seen corresponding path program 3 times [2023-08-30 19:27:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:13,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214019470] [2023-08-30 19:27:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:13,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:13,821 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 19:27:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214019470] [2023-08-30 19:27:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214019470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:27:13,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:27:13,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:27:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877803841] [2023-08-30 19:27:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:27:13,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:27:13,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:13,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:27:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:27:13,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-30 19:27:13,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 597 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:13,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-30 19:27:13,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:13,961 INFO L130 PetriNetUnfolder]: 915/1375 cut-off events. [2023-08-30 19:27:13,961 INFO L131 PetriNetUnfolder]: For 11022/11376 co-relation queries the response was YES. [2023-08-30 19:27:13,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 1375 events. 915/1375 cut-off events. For 11022/11376 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5997 event pairs, 249 based on Foata normal form. 232/1529 useless extension candidates. Maximal degree in co-relation 6687. Up to 901 conditions per place. [2023-08-30 19:27:13,975 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 54 selfloop transitions, 27 changer transitions 7/94 dead transitions. [2023-08-30 19:27:13,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 94 transitions, 1141 flow [2023-08-30 19:27:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:27:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:27:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 388 transitions. [2023-08-30 19:27:13,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5359116022099447 [2023-08-30 19:27:13,977 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 388 transitions. [2023-08-30 19:27:13,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 388 transitions. [2023-08-30 19:27:13,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:13,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 388 transitions. [2023-08-30 19:27:13,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,980 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,980 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 597 flow. Second operand 4 states and 388 transitions. [2023-08-30 19:27:13,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 94 transitions, 1141 flow [2023-08-30 19:27:13,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 1075 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 19:27:13,989 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 834 flow [2023-08-30 19:27:13,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=834, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-08-30 19:27:13,990 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-08-30 19:27:13,990 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 834 flow [2023-08-30 19:27:13,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:13,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:13,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:13,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 19:27:13,991 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:13,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1824626704, now seen corresponding path program 1 times [2023-08-30 19:27:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:13,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313571023] [2023-08-30 19:27:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:13,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:14,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:14,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313571023] [2023-08-30 19:27:14,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313571023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:14,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173879266] [2023-08-30 19:27:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:14,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:14,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:14,068 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 19:27:14,077 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 19:27:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:14,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:27:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:14,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173879266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:14,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:14,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 19:27:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840277607] [2023-08-30 19:27:14,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:14,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:27:14,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:14,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:27:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:27:14,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-30 19:27:14,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 86.5) internal successors, (692), 8 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:14,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:14,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-30 19:27:14,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:14,504 INFO L130 PetriNetUnfolder]: 1086/1555 cut-off events. [2023-08-30 19:27:14,504 INFO L131 PetriNetUnfolder]: For 14468/14605 co-relation queries the response was YES. [2023-08-30 19:27:14,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 1555 events. 1086/1555 cut-off events. For 14468/14605 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6193 event pairs, 240 based on Foata normal form. 116/1627 useless extension candidates. Maximal degree in co-relation 6510. Up to 1018 conditions per place. [2023-08-30 19:27:14,513 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 81 selfloop transitions, 49 changer transitions 2/136 dead transitions. [2023-08-30 19:27:14,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 136 transitions, 1919 flow [2023-08-30 19:27:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:27:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:27:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-08-30 19:27:14,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128913443830571 [2023-08-30 19:27:14,515 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-08-30 19:27:14,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-08-30 19:27:14,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:14,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-08-30 19:27:14,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:14,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:14,518 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:14,518 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 834 flow. Second operand 6 states and 557 transitions. [2023-08-30 19:27:14,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 136 transitions, 1919 flow [2023-08-30 19:27:14,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 136 transitions, 1885 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 19:27:14,532 INFO L231 Difference]: Finished difference. Result has 63 places, 104 transitions, 1582 flow [2023-08-30 19:27:14,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1582, PETRI_PLACES=63, PETRI_TRANSITIONS=104} [2023-08-30 19:27:14,533 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-08-30 19:27:14,533 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 104 transitions, 1582 flow [2023-08-30 19:27:14,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 86.5) internal successors, (692), 8 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:14,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:14,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:14,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:27:14,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 19:27:14,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:14,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1346321687, now seen corresponding path program 1 times [2023-08-30 19:27:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:14,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039655416] [2023-08-30 19:27:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:14,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039655416] [2023-08-30 19:27:14,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039655416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:14,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40929358] [2023-08-30 19:27:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:14,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:14,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:14,921 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 19:27:14,923 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 19:27:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:27:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:15,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:15,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40929358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:15,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:15,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-30 19:27:15,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286361273] [2023-08-30 19:27:15,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:15,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:27:15,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:27:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:27:15,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:15,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 104 transitions, 1582 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:15,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:15,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:15,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:15,551 INFO L130 PetriNetUnfolder]: 1418/2025 cut-off events. [2023-08-30 19:27:15,552 INFO L131 PetriNetUnfolder]: For 22489/23121 co-relation queries the response was YES. [2023-08-30 19:27:15,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13604 conditions, 2025 events. 1418/2025 cut-off events. For 22489/23121 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8150 event pairs, 48 based on Foata normal form. 155/2070 useless extension candidates. Maximal degree in co-relation 12560. Up to 1439 conditions per place. [2023-08-30 19:27:15,563 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 127 selfloop transitions, 55 changer transitions 2/195 dead transitions. [2023-08-30 19:27:15,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 195 transitions, 2593 flow [2023-08-30 19:27:15,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:27:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:27:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 858 transitions. [2023-08-30 19:27:15,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267034990791897 [2023-08-30 19:27:15,565 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 858 transitions. [2023-08-30 19:27:15,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 858 transitions. [2023-08-30 19:27:15,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:15,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 858 transitions. [2023-08-30 19:27:15,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.33333333333333) internal successors, (858), 9 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:15,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:15,569 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:15,569 INFO L175 Difference]: Start difference. First operand has 63 places, 104 transitions, 1582 flow. Second operand 9 states and 858 transitions. [2023-08-30 19:27:15,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 195 transitions, 2593 flow [2023-08-30 19:27:15,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 195 transitions, 2405 flow, removed 82 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:15,587 INFO L231 Difference]: Finished difference. Result has 73 places, 135 transitions, 2039 flow [2023-08-30 19:27:15,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=73, PETRI_TRANSITIONS=135} [2023-08-30 19:27:15,588 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-08-30 19:27:15,588 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 135 transitions, 2039 flow [2023-08-30 19:27:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:15,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:15,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:15,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 19:27:15,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 19:27:15,795 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:15,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash 684593127, now seen corresponding path program 2 times [2023-08-30 19:27:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26973361] [2023-08-30 19:27:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:16,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:16,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26973361] [2023-08-30 19:27:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26973361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920422880] [2023-08-30 19:27:16,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:27:16,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:16,009 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 19:27:16,011 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 19:27:16,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:27:16,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:27:16,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:16,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:16,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920422880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:16,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:16,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2023-08-30 19:27:16,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951883201] [2023-08-30 19:27:16,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:16,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:27:16,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:27:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:27:16,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:16,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 135 transitions, 2039 flow. Second operand has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:16,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:16,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:16,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:16,628 INFO L130 PetriNetUnfolder]: 1752/2515 cut-off events. [2023-08-30 19:27:16,628 INFO L131 PetriNetUnfolder]: For 28904/29412 co-relation queries the response was YES. [2023-08-30 19:27:16,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2515 events. 1752/2515 cut-off events. For 28904/29412 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10618 event pairs, 188 based on Foata normal form. 149/2542 useless extension candidates. Maximal degree in co-relation 16355. Up to 1963 conditions per place. [2023-08-30 19:27:16,642 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 142 selfloop transitions, 55 changer transitions 2/210 dead transitions. [2023-08-30 19:27:16,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 210 transitions, 2913 flow [2023-08-30 19:27:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:27:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:27:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 854 transitions. [2023-08-30 19:27:16,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242480049109883 [2023-08-30 19:27:16,645 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 854 transitions. [2023-08-30 19:27:16,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 854 transitions. [2023-08-30 19:27:16,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:16,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 854 transitions. [2023-08-30 19:27:16,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.88888888888889) internal successors, (854), 9 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:16,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:16,668 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:16,669 INFO L175 Difference]: Start difference. First operand has 73 places, 135 transitions, 2039 flow. Second operand 9 states and 854 transitions. [2023-08-30 19:27:16,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 210 transitions, 2913 flow [2023-08-30 19:27:16,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 210 transitions, 2673 flow, removed 108 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:16,692 INFO L231 Difference]: Finished difference. Result has 83 places, 154 transitions, 2238 flow [2023-08-30 19:27:16,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=83, PETRI_TRANSITIONS=154} [2023-08-30 19:27:16,692 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-08-30 19:27:16,692 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 154 transitions, 2238 flow [2023-08-30 19:27:16,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:16,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:16,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:16,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 19:27:16,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:16,898 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:16,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:16,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1615995569, now seen corresponding path program 3 times [2023-08-30 19:27:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:16,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015725011] [2023-08-30 19:27:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:16,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:17,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:17,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015725011] [2023-08-30 19:27:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015725011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:17,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922364515] [2023-08-30 19:27:17,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:27:17,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:17,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:17,053 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 19:27:17,055 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 19:27:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:27:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:27:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:17,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:17,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922364515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:17,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-30 19:27:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139673192] [2023-08-30 19:27:17,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:17,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:27:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:27:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:27:17,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:17,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 154 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:17,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:17,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:17,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:17,787 INFO L130 PetriNetUnfolder]: 2212/3181 cut-off events. [2023-08-30 19:27:17,787 INFO L131 PetriNetUnfolder]: For 36433/37003 co-relation queries the response was YES. [2023-08-30 19:27:17,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20923 conditions, 3181 events. 2212/3181 cut-off events. For 36433/37003 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13981 event pairs, 350 based on Foata normal form. 183/3222 useless extension candidates. Maximal degree in co-relation 20423. Up to 2597 conditions per place. [2023-08-30 19:27:17,804 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 173 selfloop transitions, 60 changer transitions 2/246 dead transitions. [2023-08-30 19:27:17,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 246 transitions, 3494 flow [2023-08-30 19:27:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:27:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:27:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 854 transitions. [2023-08-30 19:27:17,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242480049109883 [2023-08-30 19:27:17,807 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 854 transitions. [2023-08-30 19:27:17,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 854 transitions. [2023-08-30 19:27:17,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:17,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 854 transitions. [2023-08-30 19:27:17,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.88888888888889) internal successors, (854), 9 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:17,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:17,810 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:17,810 INFO L175 Difference]: Start difference. First operand has 83 places, 154 transitions, 2238 flow. Second operand 9 states and 854 transitions. [2023-08-30 19:27:17,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 246 transitions, 3494 flow [2023-08-30 19:27:17,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 246 transitions, 3273 flow, removed 88 selfloop flow, removed 2 redundant places. [2023-08-30 19:27:17,843 INFO L231 Difference]: Finished difference. Result has 93 places, 190 transitions, 2823 flow [2023-08-30 19:27:17,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2823, PETRI_PLACES=93, PETRI_TRANSITIONS=190} [2023-08-30 19:27:17,844 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-08-30 19:27:17,844 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 190 transitions, 2823 flow [2023-08-30 19:27:17,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:17,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:17,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:17,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:27:18,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:18,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:18,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -965213615, now seen corresponding path program 4 times [2023-08-30 19:27:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:18,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625022338] [2023-08-30 19:27:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:18,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:18,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625022338] [2023-08-30 19:27:18,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625022338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:18,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389217536] [2023-08-30 19:27:18,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:27:18,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:18,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:18,233 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 19:27:18,235 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 19:27:18,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:27:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:27:18,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:18,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389217536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:18,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-30 19:27:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968778974] [2023-08-30 19:27:18,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:27:18,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:27:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:27:18,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:18,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 190 transitions, 2823 flow. Second operand has 9 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:18,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:18,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:18,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:18,968 INFO L130 PetriNetUnfolder]: 2520/3633 cut-off events. [2023-08-30 19:27:18,968 INFO L131 PetriNetUnfolder]: For 43800/44378 co-relation queries the response was YES. [2023-08-30 19:27:18,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23906 conditions, 3633 events. 2520/3633 cut-off events. For 43800/44378 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16416 event pairs, 494 based on Foata normal form. 175/3660 useless extension candidates. Maximal degree in co-relation 23393. Up to 3113 conditions per place. [2023-08-30 19:27:18,987 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 186 selfloop transitions, 60 changer transitions 2/259 dead transitions. [2023-08-30 19:27:18,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 259 transitions, 3865 flow [2023-08-30 19:27:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:27:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:27:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 848 transitions. [2023-08-30 19:27:18,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205647636586863 [2023-08-30 19:27:18,989 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 848 transitions. [2023-08-30 19:27:18,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 848 transitions. [2023-08-30 19:27:18,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:18,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 848 transitions. [2023-08-30 19:27:18,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.22222222222223) internal successors, (848), 9 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:18,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:18,993 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:18,994 INFO L175 Difference]: Start difference. First operand has 93 places, 190 transitions, 2823 flow. Second operand 9 states and 848 transitions. [2023-08-30 19:27:18,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 259 transitions, 3865 flow [2023-08-30 19:27:19,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 259 transitions, 3537 flow, removed 152 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:19,040 INFO L231 Difference]: Finished difference. Result has 103 places, 209 transitions, 3016 flow [2023-08-30 19:27:19,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3016, PETRI_PLACES=103, PETRI_TRANSITIONS=209} [2023-08-30 19:27:19,041 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-08-30 19:27:19,041 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 209 transitions, 3016 flow [2023-08-30 19:27:19,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:19,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:19,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:19,048 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 19:27:19,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 19:27:19,246 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:19,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash 453609461, now seen corresponding path program 5 times [2023-08-30 19:27:19,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:19,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903581472] [2023-08-30 19:27:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:19,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:19,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:19,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903581472] [2023-08-30 19:27:19,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903581472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:19,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813007078] [2023-08-30 19:27:19,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:27:19,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:19,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:19,440 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 19:27:19,442 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 19:27:19,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:27:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:27:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:19,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813007078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:19,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-30 19:27:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387127232] [2023-08-30 19:27:19,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:27:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:27:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:27:19,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:19,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 209 transitions, 3016 flow. Second operand has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:19,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:19,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:19,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:20,189 INFO L130 PetriNetUnfolder]: 2914/4205 cut-off events. [2023-08-30 19:27:20,189 INFO L131 PetriNetUnfolder]: For 49997/50637 co-relation queries the response was YES. [2023-08-30 19:27:20,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27200 conditions, 4205 events. 2914/4205 cut-off events. For 49997/50637 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19652 event pairs, 614 based on Foata normal form. 205/4256 useless extension candidates. Maximal degree in co-relation 26645. Up to 3685 conditions per place. [2023-08-30 19:27:20,215 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 220 selfloop transitions, 61 changer transitions 2/294 dead transitions. [2023-08-30 19:27:20,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 294 transitions, 4461 flow [2023-08-30 19:27:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:27:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:27:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 846 transitions. [2023-08-30 19:27:20,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-08-30 19:27:20,218 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 846 transitions. [2023-08-30 19:27:20,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 846 transitions. [2023-08-30 19:27:20,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:20,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 846 transitions. [2023-08-30 19:27:20,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.0) internal successors, (846), 9 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:20,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:20,222 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:20,222 INFO L175 Difference]: Start difference. First operand has 103 places, 209 transitions, 3016 flow. Second operand 9 states and 846 transitions. [2023-08-30 19:27:20,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 294 transitions, 4461 flow [2023-08-30 19:27:20,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 294 transitions, 4174 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-08-30 19:27:20,278 INFO L231 Difference]: Finished difference. Result has 113 places, 246 transitions, 3631 flow [2023-08-30 19:27:20,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3631, PETRI_PLACES=113, PETRI_TRANSITIONS=246} [2023-08-30 19:27:20,280 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-08-30 19:27:20,280 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 246 transitions, 3631 flow [2023-08-30 19:27:20,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:20,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:20,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:20,287 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 19:27:20,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 19:27:20,485 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:20,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1955925559, now seen corresponding path program 6 times [2023-08-30 19:27:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632363655] [2023-08-30 19:27:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:20,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632363655] [2023-08-30 19:27:20,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632363655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:20,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297227493] [2023-08-30 19:27:20,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:27:20,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:20,732 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 19:27:20,734 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 19:27:20,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:27:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 19:27:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:20,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297227493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:20,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-30 19:27:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581252873] [2023-08-30 19:27:20,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:20,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:27:20,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:27:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:27:21,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:21,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 246 transitions, 3631 flow. Second operand has 10 states, 10 states have (on average 88.6) internal successors, (886), 10 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:21,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:21,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:21,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:21,658 INFO L130 PetriNetUnfolder]: 3248/4695 cut-off events. [2023-08-30 19:27:21,659 INFO L131 PetriNetUnfolder]: For 58768/59424 co-relation queries the response was YES. [2023-08-30 19:27:21,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30469 conditions, 4695 events. 3248/4695 cut-off events. For 58768/59424 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22527 event pairs, 766 based on Foata normal form. 219/4762 useless extension candidates. Maximal degree in co-relation 29879. Up to 4143 conditions per place. [2023-08-30 19:27:21,691 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 241 selfloop transitions, 61 changer transitions 2/315 dead transitions. [2023-08-30 19:27:21,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 315 transitions, 4864 flow [2023-08-30 19:27:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:27:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:27:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 848 transitions. [2023-08-30 19:27:21,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205647636586863 [2023-08-30 19:27:21,694 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 848 transitions. [2023-08-30 19:27:21,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 848 transitions. [2023-08-30 19:27:21,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:21,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 848 transitions. [2023-08-30 19:27:21,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.22222222222223) internal successors, (848), 9 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:21,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:21,698 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:21,698 INFO L175 Difference]: Start difference. First operand has 113 places, 246 transitions, 3631 flow. Second operand 9 states and 848 transitions. [2023-08-30 19:27:21,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 315 transitions, 4864 flow [2023-08-30 19:27:21,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 315 transitions, 4480 flow, removed 180 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:21,766 INFO L231 Difference]: Finished difference. Result has 123 places, 265 transitions, 3829 flow [2023-08-30 19:27:21,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=123, PETRI_TRANSITIONS=265} [2023-08-30 19:27:21,767 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2023-08-30 19:27:21,767 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 265 transitions, 3829 flow [2023-08-30 19:27:21,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.6) internal successors, (886), 10 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:21,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:21,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:21,775 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 19:27:21,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:21,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:21,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash 398392542, now seen corresponding path program 7 times [2023-08-30 19:27:21,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:21,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763790584] [2023-08-30 19:27:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:22,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:22,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763790584] [2023-08-30 19:27:22,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763790584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:22,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962276631] [2023-08-30 19:27:22,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:27:22,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:22,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:22,065 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 19:27:22,067 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 19:27:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:22,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:27:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:22,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962276631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:22,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:22,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-30 19:27:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976536780] [2023-08-30 19:27:22,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:27:22,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:22,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:27:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:27:22,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:22,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 265 transitions, 3829 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:22,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:22,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:22,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:23,530 INFO L130 PetriNetUnfolder]: 6025/8816 cut-off events. [2023-08-30 19:27:23,530 INFO L131 PetriNetUnfolder]: For 95826/96115 co-relation queries the response was YES. [2023-08-30 19:27:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53796 conditions, 8816 events. 6025/8816 cut-off events. For 95826/96115 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 45744 event pairs, 1153 based on Foata normal form. 211/8954 useless extension candidates. Maximal degree in co-relation 52165. Up to 2469 conditions per place. [2023-08-30 19:27:23,590 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 384 selfloop transitions, 114 changer transitions 0/502 dead transitions. [2023-08-30 19:27:23,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 502 transitions, 7721 flow [2023-08-30 19:27:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:27:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:27:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 960 transitions. [2023-08-30 19:27:23,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-08-30 19:27:23,593 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 960 transitions. [2023-08-30 19:27:23,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 960 transitions. [2023-08-30 19:27:23,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:23,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 960 transitions. [2023-08-30 19:27:23,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:23,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:23,597 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:23,597 INFO L175 Difference]: Start difference. First operand has 123 places, 265 transitions, 3829 flow. Second operand 10 states and 960 transitions. [2023-08-30 19:27:23,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 502 transitions, 7721 flow [2023-08-30 19:27:23,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 502 transitions, 7139 flow, removed 264 selfloop flow, removed 2 redundant places. [2023-08-30 19:27:23,762 INFO L231 Difference]: Finished difference. Result has 137 places, 313 transitions, 4577 flow [2023-08-30 19:27:23,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4577, PETRI_PLACES=137, PETRI_TRANSITIONS=313} [2023-08-30 19:27:23,762 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2023-08-30 19:27:23,762 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 313 transitions, 4577 flow [2023-08-30 19:27:23,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:23,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:23,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:23,772 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 19:27:23,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 19:27:23,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:23,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash 370733874, now seen corresponding path program 8 times [2023-08-30 19:27:23,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:23,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389126336] [2023-08-30 19:27:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:23,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:24,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389126336] [2023-08-30 19:27:24,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389126336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:24,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099780525] [2023-08-30 19:27:24,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:27:24,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:24,064 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 19:27:24,066 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 19:27:24,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:27:24,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:27:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:24,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:24,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099780525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:24,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:24,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:27:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434585805] [2023-08-30 19:27:24,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:24,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:27:24,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:27:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:27:24,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:24,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 313 transitions, 4577 flow. Second operand has 12 states, 12 states have (on average 86.58333333333333) internal successors, (1039), 12 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:24,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:24,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:24,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:25,728 INFO L130 PetriNetUnfolder]: 6565/9804 cut-off events. [2023-08-30 19:27:25,728 INFO L131 PetriNetUnfolder]: For 131046/131428 co-relation queries the response was YES. [2023-08-30 19:27:25,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60324 conditions, 9804 events. 6565/9804 cut-off events. For 131046/131428 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 55284 event pairs, 1032 based on Foata normal form. 379/10130 useless extension candidates. Maximal degree in co-relation 58619. Up to 3362 conditions per place. [2023-08-30 19:27:25,780 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 542 selfloop transitions, 161 changer transitions 0/707 dead transitions. [2023-08-30 19:27:25,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 707 transitions, 10612 flow [2023-08-30 19:27:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:27:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:27:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1132 transitions. [2023-08-30 19:27:25,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211786372007366 [2023-08-30 19:27:25,783 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1132 transitions. [2023-08-30 19:27:25,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1132 transitions. [2023-08-30 19:27:25,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:25,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1132 transitions. [2023-08-30 19:27:25,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 94.33333333333333) internal successors, (1132), 12 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:25,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:25,788 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:25,788 INFO L175 Difference]: Start difference. First operand has 137 places, 313 transitions, 4577 flow. Second operand 12 states and 1132 transitions. [2023-08-30 19:27:25,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 707 transitions, 10612 flow [2023-08-30 19:27:25,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 707 transitions, 10519 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 19:27:25,991 INFO L231 Difference]: Finished difference. Result has 152 places, 399 transitions, 6312 flow [2023-08-30 19:27:25,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6312, PETRI_PLACES=152, PETRI_TRANSITIONS=399} [2023-08-30 19:27:25,991 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2023-08-30 19:27:25,991 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 399 transitions, 6312 flow [2023-08-30 19:27:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 86.58333333333333) internal successors, (1039), 12 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:25,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:25,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:25,998 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 19:27:26,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:26,192 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:26,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1508408662, now seen corresponding path program 9 times [2023-08-30 19:27:26,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:26,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376185077] [2023-08-30 19:27:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:26,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376185077] [2023-08-30 19:27:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376185077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983290565] [2023-08-30 19:27:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:27:26,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:26,285 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 19:27:26,287 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 19:27:26,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:27:26,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:27:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:26,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983290565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:26,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-08-30 19:27:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228963788] [2023-08-30 19:27:26,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:27:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:27:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:27:26,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-30 19:27:26,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 399 transitions, 6312 flow. Second operand has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:26,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:26,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-30 19:27:26,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:28,994 INFO L130 PetriNetUnfolder]: 9129/13642 cut-off events. [2023-08-30 19:27:28,994 INFO L131 PetriNetUnfolder]: For 192789/192789 co-relation queries the response was YES. [2023-08-30 19:27:29,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96810 conditions, 13642 events. 9129/13642 cut-off events. For 192789/192789 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 79594 event pairs, 1429 based on Foata normal form. 136/13778 useless extension candidates. Maximal degree in co-relation 94851. Up to 3821 conditions per place. [2023-08-30 19:27:29,077 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 482 selfloop transitions, 314 changer transitions 0/796 dead transitions. [2023-08-30 19:27:29,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 796 transitions, 14072 flow [2023-08-30 19:27:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:27:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:27:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1750 transitions. [2023-08-30 19:27:29,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088688572259378 [2023-08-30 19:27:29,080 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1750 transitions. [2023-08-30 19:27:29,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1750 transitions. [2023-08-30 19:27:29,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:29,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1750 transitions. [2023-08-30 19:27:29,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.10526315789474) internal successors, (1750), 19 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:29,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:29,086 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:29,086 INFO L175 Difference]: Start difference. First operand has 152 places, 399 transitions, 6312 flow. Second operand 19 states and 1750 transitions. [2023-08-30 19:27:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 796 transitions, 14072 flow [2023-08-30 19:27:29,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 796 transitions, 13414 flow, removed 239 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:29,855 INFO L231 Difference]: Finished difference. Result has 181 places, 544 transitions, 9924 flow [2023-08-30 19:27:29,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9924, PETRI_PLACES=181, PETRI_TRANSITIONS=544} [2023-08-30 19:27:29,855 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-08-30 19:27:29,856 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 544 transitions, 9924 flow [2023-08-30 19:27:29,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:29,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:29,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:29,861 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 19:27:30,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:30,061 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:30,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:30,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1869920993, now seen corresponding path program 10 times [2023-08-30 19:27:30,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:30,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115350318] [2023-08-30 19:27:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:30,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:30,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:30,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115350318] [2023-08-30 19:27:30,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115350318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:30,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658777713] [2023-08-30 19:27:30,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:27:30,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:30,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:30,168 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 19:27:30,170 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 19:27:30,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:27:30,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:27:30,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:30,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:30,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658777713] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:30,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:30,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:27:30,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804762669] [2023-08-30 19:27:30,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:27:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:27:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:27:30,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:30,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 544 transitions, 9924 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:30,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:30,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:30,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:33,159 INFO L130 PetriNetUnfolder]: 9529/14689 cut-off events. [2023-08-30 19:27:33,160 INFO L131 PetriNetUnfolder]: For 321607/321954 co-relation queries the response was YES. [2023-08-30 19:27:33,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112168 conditions, 14689 events. 9529/14689 cut-off events. For 321607/321954 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 93071 event pairs, 1858 based on Foata normal form. 651/15306 useless extension candidates. Maximal degree in co-relation 110057. Up to 5162 conditions per place. [2023-08-30 19:27:33,258 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 627 selfloop transitions, 309 changer transitions 57/1000 dead transitions. [2023-08-30 19:27:33,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1000 transitions, 19252 flow [2023-08-30 19:27:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:27:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:27:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1124 transitions. [2023-08-30 19:27:33,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174953959484346 [2023-08-30 19:27:33,260 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1124 transitions. [2023-08-30 19:27:33,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1124 transitions. [2023-08-30 19:27:33,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:33,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1124 transitions. [2023-08-30 19:27:33,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.66666666666667) internal successors, (1124), 12 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:33,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:33,264 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:33,264 INFO L175 Difference]: Start difference. First operand has 181 places, 544 transitions, 9924 flow. Second operand 12 states and 1124 transitions. [2023-08-30 19:27:33,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1000 transitions, 19252 flow [2023-08-30 19:27:34,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1000 transitions, 18400 flow, removed 426 selfloop flow, removed 0 redundant places. [2023-08-30 19:27:34,947 INFO L231 Difference]: Finished difference. Result has 196 places, 662 transitions, 12095 flow [2023-08-30 19:27:34,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12095, PETRI_PLACES=196, PETRI_TRANSITIONS=662} [2023-08-30 19:27:34,948 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2023-08-30 19:27:34,948 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 662 transitions, 12095 flow [2023-08-30 19:27:34,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:34,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:34,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:34,953 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 19:27:35,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-30 19:27:35,149 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:35,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash 759710336, now seen corresponding path program 11 times [2023-08-30 19:27:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601884235] [2023-08-30 19:27:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:35,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601884235] [2023-08-30 19:27:35,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601884235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873080859] [2023-08-30 19:27:35,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:27:35,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:35,258 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 19:27:35,284 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 19:27:35,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:27:35,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:27:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:35,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873080859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:35,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:35,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 19:27:35,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38749386] [2023-08-30 19:27:35,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:35,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:27:35,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:35,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:27:35,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:27:35,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-30 19:27:35,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 662 transitions, 12095 flow. Second operand has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:35,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:35,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-30 19:27:35,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:39,302 INFO L130 PetriNetUnfolder]: 12256/18912 cut-off events. [2023-08-30 19:27:39,302 INFO L131 PetriNetUnfolder]: For 510180/511167 co-relation queries the response was YES. [2023-08-30 19:27:39,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154470 conditions, 18912 events. 12256/18912 cut-off events. For 510180/511167 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 125729 event pairs, 3713 based on Foata normal form. 525/19315 useless extension candidates. Maximal degree in co-relation 153036. Up to 7877 conditions per place. [2023-08-30 19:27:39,453 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 538 selfloop transitions, 527 changer transitions 0/1074 dead transitions. [2023-08-30 19:27:39,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1074 transitions, 21588 flow [2023-08-30 19:27:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:27:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:27:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1431 transitions. [2023-08-30 19:27:39,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270718232044199 [2023-08-30 19:27:39,456 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1431 transitions. [2023-08-30 19:27:39,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1431 transitions. [2023-08-30 19:27:39,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:39,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1431 transitions. [2023-08-30 19:27:39,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 95.4) internal successors, (1431), 15 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:39,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:39,460 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:39,460 INFO L175 Difference]: Start difference. First operand has 196 places, 662 transitions, 12095 flow. Second operand 15 states and 1431 transitions. [2023-08-30 19:27:39,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1074 transitions, 21588 flow [2023-08-30 19:27:42,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1074 transitions, 20884 flow, removed 352 selfloop flow, removed 0 redundant places. [2023-08-30 19:27:42,467 INFO L231 Difference]: Finished difference. Result has 218 places, 808 transitions, 16694 flow [2023-08-30 19:27:42,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=11895, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16694, PETRI_PLACES=218, PETRI_TRANSITIONS=808} [2023-08-30 19:27:42,468 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2023-08-30 19:27:42,468 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 808 transitions, 16694 flow [2023-08-30 19:27:42,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:42,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:42,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:42,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:27:42,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 19:27:42,670 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:42,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1097498205, now seen corresponding path program 12 times [2023-08-30 19:27:42,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:42,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523936286] [2023-08-30 19:27:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:42,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:42,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:42,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523936286] [2023-08-30 19:27:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523936286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152599963] [2023-08-30 19:27:42,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:27:42,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:42,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:42,790 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 19:27:42,792 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 19:27:42,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:27:42,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:27:42,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:42,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:42,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152599963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:42,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:42,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 19:27:42,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915245021] [2023-08-30 19:27:42,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:27:42,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:27:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:27:43,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 19:27:43,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 808 transitions, 16694 flow. Second operand has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:43,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:43,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 19:27:43,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:49,264 INFO L130 PetriNetUnfolder]: 16344/24921 cut-off events. [2023-08-30 19:27:49,265 INFO L131 PetriNetUnfolder]: For 621132/621132 co-relation queries the response was YES. [2023-08-30 19:27:49,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222877 conditions, 24921 events. 16344/24921 cut-off events. For 621132/621132 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 168448 event pairs, 1979 based on Foata normal form. 384/25305 useless extension candidates. Maximal degree in co-relation 219924. Up to 7259 conditions per place. [2023-08-30 19:27:49,604 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 744 selfloop transitions, 870 changer transitions 24/1638 dead transitions. [2023-08-30 19:27:49,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1638 transitions, 39416 flow [2023-08-30 19:27:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 19:27:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 19:27:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3544 transitions. [2023-08-30 19:27:49,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895027624309392 [2023-08-30 19:27:49,608 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3544 transitions. [2023-08-30 19:27:49,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3544 transitions. [2023-08-30 19:27:49,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:49,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3544 transitions. [2023-08-30 19:27:49,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 88.6) internal successors, (3544), 40 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:49,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:49,618 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:49,618 INFO L175 Difference]: Start difference. First operand has 218 places, 808 transitions, 16694 flow. Second operand 40 states and 3544 transitions. [2023-08-30 19:27:49,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1638 transitions, 39416 flow [2023-08-30 19:27:54,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1638 transitions, 38159 flow, removed 281 selfloop flow, removed 4 redundant places. [2023-08-30 19:27:54,227 INFO L231 Difference]: Finished difference. Result has 277 places, 1239 transitions, 30160 flow [2023-08-30 19:27:54,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=16000, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=30160, PETRI_PLACES=277, PETRI_TRANSITIONS=1239} [2023-08-30 19:27:54,228 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2023-08-30 19:27:54,228 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1239 transitions, 30160 flow [2023-08-30 19:27:54,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:54,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:54,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:54,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 19:27:54,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 19:27:54,433 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:54,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash -675327254, now seen corresponding path program 13 times [2023-08-30 19:27:54,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:54,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736583538] [2023-08-30 19:27:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:54,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736583538] [2023-08-30 19:27:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736583538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579861689] [2023-08-30 19:27:54,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:27:54,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:54,555 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 19:27:54,557 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 19:27:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:27:54,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:54,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:27:54,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579861689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:54,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:54,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 19:27:54,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756977702] [2023-08-30 19:27:54,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:54,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:27:54,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:27:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:27:54,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:27:54,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1239 transitions, 30160 flow. Second operand has 15 states, 15 states have (on average 86.26666666666667) internal successors, (1294), 15 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:54,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:54,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:27:54,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:28:04,005 INFO L130 PetriNetUnfolder]: 17362/27169 cut-off events. [2023-08-30 19:28:04,005 INFO L131 PetriNetUnfolder]: For 973421/974450 co-relation queries the response was YES. [2023-08-30 19:28:04,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258734 conditions, 27169 events. 17362/27169 cut-off events. For 973421/974450 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 196745 event pairs, 2900 based on Foata normal form. 954/28070 useless extension candidates. Maximal degree in co-relation 256737. Up to 8079 conditions per place. [2023-08-30 19:28:04,303 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 942 selfloop transitions, 837 changer transitions 31/1825 dead transitions. [2023-08-30 19:28:04,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1825 transitions, 44035 flow [2023-08-30 19:28:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:28:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:28:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1998 transitions. [2023-08-30 19:28:04,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256511444356748 [2023-08-30 19:28:04,305 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1998 transitions. [2023-08-30 19:28:04,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1998 transitions. [2023-08-30 19:28:04,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:28:04,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1998 transitions. [2023-08-30 19:28:04,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.14285714285714) internal successors, (1998), 21 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:04,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:04,310 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:04,310 INFO L175 Difference]: Start difference. First operand has 277 places, 1239 transitions, 30160 flow. Second operand 21 states and 1998 transitions. [2023-08-30 19:28:04,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1825 transitions, 44035 flow [2023-08-30 19:28:09,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1825 transitions, 39708 flow, removed 1774 selfloop flow, removed 3 redundant places. [2023-08-30 19:28:09,910 INFO L231 Difference]: Finished difference. Result has 301 places, 1314 transitions, 30347 flow [2023-08-30 19:28:09,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=25900, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=30347, PETRI_PLACES=301, PETRI_TRANSITIONS=1314} [2023-08-30 19:28:09,911 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 272 predicate places. [2023-08-30 19:28:09,912 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1314 transitions, 30347 flow [2023-08-30 19:28:09,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.26666666666667) internal successors, (1294), 15 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:09,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:28:09,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:28:09,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 19:28:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:28:10,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:28:10,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:28:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash 421066253, now seen corresponding path program 14 times [2023-08-30 19:28:10,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:28:10,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774629623] [2023-08-30 19:28:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:28:10,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:28:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:28:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:28:10,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:28:10,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774629623] [2023-08-30 19:28:10,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774629623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:28:10,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528755056] [2023-08-30 19:28:10,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:28:10,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:28:10,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:28:10,221 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 19:28:10,223 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 19:28:10,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:28:10,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:28:10,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:28:10,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:28:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:28:10,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:28:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:28:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528755056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:28:10,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:28:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 19:28:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203413234] [2023-08-30 19:28:10,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:28:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:28:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:28:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:28:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:28:10,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 19:28:10,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1314 transitions, 30347 flow. Second operand has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:10,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:28:10,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 19:28:10,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:28:23,559 INFO L130 PetriNetUnfolder]: 20220/32024 cut-off events. [2023-08-30 19:28:23,560 INFO L131 PetriNetUnfolder]: For 1011905/1011905 co-relation queries the response was YES. [2023-08-30 19:28:23,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311955 conditions, 32024 events. 20220/32024 cut-off events. For 1011905/1011905 co-relation queries the response was YES. Maximal size of possible extension queue 1400. Compared 241242 event pairs, 1279 based on Foata normal form. 904/32928 useless extension candidates. Maximal degree in co-relation 310180. Up to 9943 conditions per place. [2023-08-30 19:28:24,068 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 1617 selfloop transitions, 1264 changer transitions 50/2931 dead transitions. [2023-08-30 19:28:24,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 2931 transitions, 72409 flow [2023-08-30 19:28:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-08-30 19:28:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-08-30 19:28:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 9314 transitions. [2023-08-30 19:28:24,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809211545412299 [2023-08-30 19:28:24,075 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 9314 transitions. [2023-08-30 19:28:24,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 9314 transitions. [2023-08-30 19:28:24,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:28:24,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 9314 transitions. [2023-08-30 19:28:24,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 87.04672897196262) internal successors, (9314), 107 states have internal predecessors, (9314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:24,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:24,098 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:24,098 INFO L175 Difference]: Start difference. First operand has 301 places, 1314 transitions, 30347 flow. Second operand 107 states and 9314 transitions. [2023-08-30 19:28:24,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 2931 transitions, 72409 flow [2023-08-30 19:28:32,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2931 transitions, 69443 flow, removed 955 selfloop flow, removed 8 redundant places. [2023-08-30 19:28:32,806 INFO L231 Difference]: Finished difference. Result has 457 places, 1751 transitions, 45382 flow [2023-08-30 19:28:32,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=28313, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=45382, PETRI_PLACES=457, PETRI_TRANSITIONS=1751} [2023-08-30 19:28:32,807 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 428 predicate places. [2023-08-30 19:28:32,807 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1751 transitions, 45382 flow [2023-08-30 19:28:32,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:32,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:28:32,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:28:32,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 19:28:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:28:33,012 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:28:33,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:28:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1130474012, now seen corresponding path program 15 times [2023-08-30 19:28:33,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:28:33,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506634250] [2023-08-30 19:28:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:28:33,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:28:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:28:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:28:33,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:28:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506634250] [2023-08-30 19:28:33,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506634250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:28:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748778561] [2023-08-30 19:28:33,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:28:33,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:28:33,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:28:33,097 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 19:28:33,099 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 19:28:33,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:28:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:28:33,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:28:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:28:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:28:33,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:28:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:28:33,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748778561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:28:33,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:28:33,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 19:28:33,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036143932] [2023-08-30 19:28:33,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:28:33,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:28:33,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:28:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:28:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:28:33,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 19:28:33,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1751 transitions, 45382 flow. Second operand has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:33,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:28:33,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 19:28:33,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:28:49,982 INFO L130 PetriNetUnfolder]: 22490/35283 cut-off events. [2023-08-30 19:28:49,982 INFO L131 PetriNetUnfolder]: For 1898312/1898312 co-relation queries the response was YES. [2023-08-30 19:28:50,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413375 conditions, 35283 events. 22490/35283 cut-off events. For 1898312/1898312 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 264287 event pairs, 4018 based on Foata normal form. 448/35731 useless extension candidates. Maximal degree in co-relation 411626. Up to 12065 conditions per place. [2023-08-30 19:28:50,722 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 1269 selfloop transitions, 1128 changer transitions 10/2407 dead transitions. [2023-08-30 19:28:50,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 2407 transitions, 68462 flow [2023-08-30 19:28:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 19:28:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 19:28:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2178 transitions. [2023-08-30 19:28:50,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013812154696132 [2023-08-30 19:28:50,724 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2178 transitions. [2023-08-30 19:28:50,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2178 transitions. [2023-08-30 19:28:50,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:28:50,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2178 transitions. [2023-08-30 19:28:50,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.75) internal successors, (2178), 24 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:50,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:50,729 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:28:50,729 INFO L175 Difference]: Start difference. First operand has 457 places, 1751 transitions, 45382 flow. Second operand 24 states and 2178 transitions. [2023-08-30 19:28:50,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 2407 transitions, 68462 flow [2023-08-30 19:29:12,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2407 transitions, 58728 flow, removed 4124 selfloop flow, removed 16 redundant places. [2023-08-30 19:29:12,559 INFO L231 Difference]: Finished difference. Result has 477 places, 1949 transitions, 47880 flow [2023-08-30 19:29:12,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=38967, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=935, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=47880, PETRI_PLACES=477, PETRI_TRANSITIONS=1949} [2023-08-30 19:29:12,561 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 448 predicate places. [2023-08-30 19:29:12,561 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1949 transitions, 47880 flow [2023-08-30 19:29:12,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:12,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:29:12,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:29:12,566 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 19:29:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 19:29:12,765 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:29:12,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:29:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1061750104, now seen corresponding path program 16 times [2023-08-30 19:29:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:29:12,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794074736] [2023-08-30 19:29:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:29:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:29:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:29:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:29:12,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:29:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794074736] [2023-08-30 19:29:12,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794074736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:29:12,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462549425] [2023-08-30 19:29:12,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:29:12,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:12,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:29:12,848 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 19:29:12,850 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 19:29:12,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:29:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:29:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:29:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:29:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:29:12,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:29:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:29:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462549425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:29:13,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:29:13,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 19:29:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505378084] [2023-08-30 19:29:13,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:29:13,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:29:13,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:29:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:29:13,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:29:13,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-30 19:29:13,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1949 transitions, 47880 flow. Second operand has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:13,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:29:13,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-30 19:29:13,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:29:34,249 INFO L130 PetriNetUnfolder]: 27906/43562 cut-off events. [2023-08-30 19:29:34,249 INFO L131 PetriNetUnfolder]: For 2834220/2835265 co-relation queries the response was YES. [2023-08-30 19:29:35,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505351 conditions, 43562 events. 27906/43562 cut-off events. For 2834220/2835265 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 334716 event pairs, 4339 based on Foata normal form. 871/44253 useless extension candidates. Maximal degree in co-relation 502266. Up to 15937 conditions per place. [2023-08-30 19:29:35,480 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1222 selfloop transitions, 1536 changer transitions 10/2793 dead transitions. [2023-08-30 19:29:35,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2793 transitions, 73383 flow [2023-08-30 19:29:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:29:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:29:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1974 transitions. [2023-08-30 19:29:35,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-08-30 19:29:35,482 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1974 transitions. [2023-08-30 19:29:35,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1974 transitions. [2023-08-30 19:29:35,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:29:35,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1974 transitions. [2023-08-30 19:29:35,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.0) internal successors, (1974), 21 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:35,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:35,487 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:35,487 INFO L175 Difference]: Start difference. First operand has 477 places, 1949 transitions, 47880 flow. Second operand 21 states and 1974 transitions. [2023-08-30 19:29:35,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2793 transitions, 73383 flow [2023-08-30 19:30:03,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2793 transitions, 70522 flow, removed 1040 selfloop flow, removed 2 redundant places. [2023-08-30 19:30:03,357 INFO L231 Difference]: Finished difference. Result has 501 places, 2275 transitions, 60052 flow [2023-08-30 19:30:03,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=45422, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=60052, PETRI_PLACES=501, PETRI_TRANSITIONS=2275} [2023-08-30 19:30:03,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 472 predicate places. [2023-08-30 19:30:03,359 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 2275 transitions, 60052 flow [2023-08-30 19:30:03,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:03,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:30:03,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:30:03,376 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 19:30:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 19:30:03,577 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:30:03,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:30:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1702446798, now seen corresponding path program 17 times [2023-08-30 19:30:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:30:03,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993017966] [2023-08-30 19:30:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:30:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:30:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:30:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:30:03,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:30:03,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993017966] [2023-08-30 19:30:03,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993017966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:30:03,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25379800] [2023-08-30 19:30:03,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:30:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:30:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:30:03,649 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 19:30:03,651 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 19:30:03,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:30:03,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:30:03,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:30:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:30:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:30:03,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:30:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:30:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25379800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:30:03,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:30:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 19:30:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137966664] [2023-08-30 19:30:03,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:30:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:30:03,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:30:03,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:30:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:30:03,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 19:30:03,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 2275 transitions, 60052 flow. Second operand has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:03,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:30:03,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 19:30:03,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:30:38,200 INFO L130 PetriNetUnfolder]: 36739/58795 cut-off events. [2023-08-30 19:30:38,200 INFO L131 PetriNetUnfolder]: For 3812895/3814653 co-relation queries the response was YES. [2023-08-30 19:30:39,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684475 conditions, 58795 events. 36739/58795 cut-off events. For 3812895/3814653 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 492327 event pairs, 7925 based on Foata normal form. 1620/60211 useless extension candidates. Maximal degree in co-relation 682787. Up to 25301 conditions per place. [2023-08-30 19:30:39,963 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 2409 selfloop transitions, 1221 changer transitions 83/3738 dead transitions. [2023-08-30 19:30:39,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 3738 transitions, 99381 flow [2023-08-30 19:30:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 19:30:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 19:30:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2160 transitions. [2023-08-30 19:30:39,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188565938025462 [2023-08-30 19:30:39,966 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2160 transitions. [2023-08-30 19:30:39,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2160 transitions. [2023-08-30 19:30:39,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:30:39,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2160 transitions. [2023-08-30 19:30:39,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.91304347826087) internal successors, (2160), 23 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:40,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:40,063 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:30:40,063 INFO L175 Difference]: Start difference. First operand has 501 places, 2275 transitions, 60052 flow. Second operand 23 states and 2160 transitions. [2023-08-30 19:30:40,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 3738 transitions, 99381 flow [2023-08-30 19:31:26,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 3738 transitions, 95826 flow, removed 773 selfloop flow, removed 6 redundant places. [2023-08-30 19:31:26,989 INFO L231 Difference]: Finished difference. Result has 531 places, 2844 transitions, 77170 flow [2023-08-30 19:31:26,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=57051, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=77170, PETRI_PLACES=531, PETRI_TRANSITIONS=2844} [2023-08-30 19:31:26,991 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 502 predicate places. [2023-08-30 19:31:26,991 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 2844 transitions, 77170 flow [2023-08-30 19:31:26,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:31:26,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:26,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:26,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 19:31:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 19:31:27,196 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:31:27,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1866322504, now seen corresponding path program 18 times [2023-08-30 19:31:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:27,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029997645] [2023-08-30 19:31:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:27,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029997645] [2023-08-30 19:31:27,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029997645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:27,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564304122] [2023-08-30 19:31:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:31:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:27,285 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 19:31:27,287 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 19:31:27,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:31:27,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:27,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:31:27,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:27,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:27,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564304122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:31:27,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:31:27,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 19:31:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939749363] [2023-08-30 19:31:27,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:31:27,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:31:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:31:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:31:27,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-30 19:31:27,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 2844 transitions, 77170 flow. Second operand has 15 states, 15 states have (on average 85.8) internal successors, (1287), 15 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:31:27,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:27,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-30 19:31:27,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:32:30,402 INFO L130 PetriNetUnfolder]: 56508/91382 cut-off events. [2023-08-30 19:32:30,402 INFO L131 PetriNetUnfolder]: For 6643618/6644083 co-relation queries the response was YES. [2023-08-30 19:32:33,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128416 conditions, 91382 events. 56508/91382 cut-off events. For 6643618/6644083 co-relation queries the response was YES. Maximal size of possible extension queue 4375. Compared 818134 event pairs, 8552 based on Foata normal form. 2337/93600 useless extension candidates. Maximal degree in co-relation 1126717. Up to 31473 conditions per place. [2023-08-30 19:32:33,884 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 2344 selfloop transitions, 1760 changer transitions 15/4172 dead transitions. [2023-08-30 19:32:33,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 4172 transitions, 124408 flow [2023-08-30 19:32:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:32:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:32:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1974 transitions. [2023-08-30 19:32:33,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-08-30 19:32:33,887 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1974 transitions. [2023-08-30 19:32:33,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1974 transitions. [2023-08-30 19:32:33,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:32:33,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1974 transitions. [2023-08-30 19:32:33,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.0) internal successors, (1974), 21 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:33,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:33,891 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:32:33,891 INFO L175 Difference]: Start difference. First operand has 531 places, 2844 transitions, 77170 flow. Second operand 21 states and 1974 transitions. [2023-08-30 19:32:33,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 4172 transitions, 124408 flow [2023-08-30 19:34:50,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 4172 transitions, 119034 flow, removed 2361 selfloop flow, removed 4 redundant places. [2023-08-30 19:34:50,407 INFO L231 Difference]: Finished difference. Result has 555 places, 3245 transitions, 90846 flow [2023-08-30 19:34:50,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=74906, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=90846, PETRI_PLACES=555, PETRI_TRANSITIONS=3245} [2023-08-30 19:34:50,410 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 526 predicate places. [2023-08-30 19:34:50,410 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 3245 transitions, 90846 flow [2023-08-30 19:34:50,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.8) internal successors, (1287), 15 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:34:50,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:34:50,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:34:50,418 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 19:34:50,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:34:50,615 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:34:50,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:34:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1400967236, now seen corresponding path program 19 times [2023-08-30 19:34:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:34:50,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336523801] [2023-08-30 19:34:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:34:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:34:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:34:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:34:50,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:34:50,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336523801] [2023-08-30 19:34:50,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336523801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:34:50,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138460171] [2023-08-30 19:34:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:34:50,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:34:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:34:50,707 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 19:34:50,709 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 19:34:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:34:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:34:50,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:34:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:34:50,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:34:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:34:50,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138460171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:34:50,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:34:50,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-30 19:34:50,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375440183] [2023-08-30 19:34:50,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:34:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:34:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:34:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:34:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:34:51,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 19:34:51,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 3245 transitions, 90846 flow. Second operand has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:34:51,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:34:51,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 19:34:51,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:36:34,929 INFO L130 PetriNetUnfolder]: 70083/114413 cut-off events. [2023-08-30 19:36:34,930 INFO L131 PetriNetUnfolder]: For 9409478/9409478 co-relation queries the response was YES. [2023-08-30 19:36:39,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464709 conditions, 114413 events. 70083/114413 cut-off events. For 9409478/9409478 co-relation queries the response was YES. Maximal size of possible extension queue 5612. Compared 1078895 event pairs, 6761 based on Foata normal form. 814/115227 useless extension candidates. Maximal degree in co-relation 1462812. Up to 40233 conditions per place. [2023-08-30 19:36:40,028 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 2983 selfloop transitions, 2617 changer transitions 54/5654 dead transitions. [2023-08-30 19:36:40,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 5654 transitions, 168291 flow [2023-08-30 19:36:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 19:36:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 19:36:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3460 transitions. [2023-08-30 19:36:40,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49015441280634653 [2023-08-30 19:36:40,031 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3460 transitions. [2023-08-30 19:36:40,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3460 transitions. [2023-08-30 19:36:40,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:36:40,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3460 transitions. [2023-08-30 19:36:40,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.71794871794872) internal successors, (3460), 39 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:36:40,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:36:40,038 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:36:40,038 INFO L175 Difference]: Start difference. First operand has 555 places, 3245 transitions, 90846 flow. Second operand 39 states and 3460 transitions. [2023-08-30 19:36:40,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 5654 transitions, 168291 flow [2023-08-30 19:39:24,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 5654 transitions, 163781 flow, removed 1315 selfloop flow, removed 4 redundant places. [2023-08-30 19:39:24,272 INFO L231 Difference]: Finished difference. Result has 610 places, 4265 transitions, 130156 flow [2023-08-30 19:39:24,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=88148, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=130156, PETRI_PLACES=610, PETRI_TRANSITIONS=4265} [2023-08-30 19:39:24,275 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 581 predicate places. [2023-08-30 19:39:24,275 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 4265 transitions, 130156 flow [2023-08-30 19:39:24,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:24,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:24,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:24,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:24,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:24,477 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:24,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1116183444, now seen corresponding path program 20 times [2023-08-30 19:39:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:24,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296614545] [2023-08-30 19:39:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:24,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:24,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296614545] [2023-08-30 19:39:24,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296614545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:24,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526616665] [2023-08-30 19:39:24,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:39:24,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:24,547 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 19:39:24,549 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 19:39:24,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:39:24,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:39:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:24,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:24,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526616665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:24,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:24,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 19:39:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544778573] [2023-08-30 19:39:24,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:24,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:39:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:39:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:39:24,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-30 19:39:24,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 4265 transitions, 130156 flow. Second operand has 15 states, 15 states have (on average 85.26666666666667) internal successors, (1279), 15 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:24,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:24,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-30 19:39:24,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15