./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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 ../sv-benchmarks/c/weaver/chl-array-int-subst.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 d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:55:57,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:55:57,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:55:57,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:55:57,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:55:57,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:55:57,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:55:57,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:55:57,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:55:57,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:55:57,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:55:57,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:55:57,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:55:57,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:55:57,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:55:57,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:55:57,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:55:57,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:55:57,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:55:57,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:55:57,398 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:55:57,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:55:57,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:55:57,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:55:57,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:55:57,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:55:57,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:55:57,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:55:57,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:55:57,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:55:57,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:55:57,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:55:57,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:55:57,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:55:57,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:55:57,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:55:57,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:55:57,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:55:57,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:55:57,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:55:57,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:55:57,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:55:57,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:55:57,445 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:55:57,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:55:57,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:55:57,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:55:57,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:55:57,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:55:57,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:55:57,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:55:57,447 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:55:57,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:55:57,447 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:55:57,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:55:57,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:55:57,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:55:57,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:55:57,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:55:57,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:55:57,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:55:57,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:55:57,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:55:57,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:55:57,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:55:57,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:55:57,450 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:55:57,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:55:57,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:55:57,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-07-21 08:55:57,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:55:57,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:55:57,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:55:57,721 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:55:57,722 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:55:57,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-07-21 08:55:57,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1614f961f/70d1a195ed9a48cdb1ddb6f1c8ae4219/FLAG8464545c0 [2022-07-21 08:55:58,139 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:55:58,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-07-21 08:55:58,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1614f961f/70d1a195ed9a48cdb1ddb6f1c8ae4219/FLAG8464545c0 [2022-07-21 08:55:58,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1614f961f/70d1a195ed9a48cdb1ddb6f1c8ae4219 [2022-07-21 08:55:58,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:55:58,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:55:58,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:55:58,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:55:58,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:55:58,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d25f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58, skipping insertion in model container [2022-07-21 08:55:58,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:55:58,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:55:58,748 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-07-21 08:55:58,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:55:58,791 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:55:58,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-07-21 08:55:58,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:55:58,831 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:55:58,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58 WrapperNode [2022-07-21 08:55:58,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:55:58,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:55:58,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:55:58,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:55:58,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,881 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 281 [2022-07-21 08:55:58,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:55:58,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:55:58,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:55:58,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:55:58,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:55:58,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:55:58,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:55:58,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:55:58,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (1/1) ... [2022-07-21 08:55:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:55:58,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:55:58,949 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) [2022-07-21 08:55:58,973 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 [2022-07-21 08:55:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:55:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:55:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:55:58,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:55:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 08:55:58,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 08:55:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 08:55:58,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 08:55:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 08:55:58,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 08:55:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:55:58,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 08:55:58,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:55:58,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:55:58,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:55:58,991 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:55:59,094 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:55:59,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:55:59,506 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:55:59,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:55:59,517 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 08:55:59,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:55:59 BoogieIcfgContainer [2022-07-21 08:55:59,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:55:59,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:55:59,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:55:59,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:55:59,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:55:58" (1/3) ... [2022-07-21 08:55:59,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eabb991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:55:59, skipping insertion in model container [2022-07-21 08:55:59,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:55:58" (2/3) ... [2022-07-21 08:55:59,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eabb991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:55:59, skipping insertion in model container [2022-07-21 08:55:59,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:55:59" (3/3) ... [2022-07-21 08:55:59,525 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2022-07-21 08:55:59,529 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:55:59,547 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:55:59,547 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:55:59,547 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:55:59,628 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:55:59,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 339 places, 358 transitions, 740 flow [2022-07-21 08:55:59,773 INFO L129 PetriNetUnfolder]: 29/355 cut-off events. [2022-07-21 08:55:59,777 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:55:59,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 355 events. 29/355 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 584 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 269. Up to 3 conditions per place. [2022-07-21 08:55:59,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 358 transitions, 740 flow [2022-07-21 08:55:59,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 325 places, 344 transitions, 706 flow [2022-07-21 08:55:59,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:55:59,805 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4c4b2bb8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65133d85 [2022-07-21 08:55:59,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:55:59,875 INFO L129 PetriNetUnfolder]: 29/343 cut-off events. [2022-07-21 08:55:59,875 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:55:59,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:55:59,876 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:55:59,876 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)] === [2022-07-21 08:55:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:55:59,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1953458268, now seen corresponding path program 1 times [2022-07-21 08:55:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:55:59,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950778376] [2022-07-21 08:55:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:55:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:55:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:00,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950778376] [2022-07-21 08:56:00,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950778376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:00,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:56:00,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:56:00,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542130329] [2022-07-21 08:56:00,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:00,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:56:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:56:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:56:00,095 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 358 [2022-07-21 08:56:00,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 344 transitions, 706 flow. Second operand has 2 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:00,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:00,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 358 [2022-07-21 08:56:00,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:00,194 INFO L129 PetriNetUnfolder]: 9/324 cut-off events. [2022-07-21 08:56:00,195 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-21 08:56:00,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 324 events. 9/324 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 563 event pairs, 0 based on Foata normal form. 26/327 useless extension candidates. Maximal degree in co-relation 256. Up to 7 conditions per place. [2022-07-21 08:56:00,201 INFO L132 encePairwiseOnDemand]: 338/358 looper letters, 6 selfloop transitions, 0 changer transitions 8/324 dead transitions. [2022-07-21 08:56:00,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 324 transitions, 678 flow [2022-07-21 08:56:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:56:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:56:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 688 transitions. [2022-07-21 08:56:00,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9608938547486033 [2022-07-21 08:56:00,226 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 688 transitions. [2022-07-21 08:56:00,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 688 transitions. [2022-07-21 08:56:00,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:00,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 688 transitions. [2022-07-21 08:56:00,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 344.0) internal successors, (688), 2 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:00,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:00,244 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:00,245 INFO L186 Difference]: Start difference. First operand has 325 places, 344 transitions, 706 flow. Second operand 2 states and 688 transitions. [2022-07-21 08:56:00,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 324 transitions, 678 flow [2022-07-21 08:56:00,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 324 transitions, 666 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 08:56:00,254 INFO L242 Difference]: Finished difference. Result has 320 places, 316 transitions, 638 flow [2022-07-21 08:56:00,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=638, PETRI_PLACES=320, PETRI_TRANSITIONS=316} [2022-07-21 08:56:00,257 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, -5 predicate places. [2022-07-21 08:56:00,258 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 316 transitions, 638 flow [2022-07-21 08:56:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:00,258 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:00,258 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:00,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:56:00,259 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)] === [2022-07-21 08:56:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1280046237, now seen corresponding path program 1 times [2022-07-21 08:56:00,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:00,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274437438] [2022-07-21 08:56:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:00,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:01,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274437438] [2022-07-21 08:56:01,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274437438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:01,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:56:01,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-21 08:56:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227105790] [2022-07-21 08:56:01,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:01,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 08:56:01,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 08:56:01,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-07-21 08:56:01,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-21 08:56:01,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 316 transitions, 638 flow. Second operand has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:01,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:01,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-21 08:56:01,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:04,225 INFO L129 PetriNetUnfolder]: 1306/10262 cut-off events. [2022-07-21 08:56:04,225 INFO L130 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2022-07-21 08:56:04,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12162 conditions, 10262 events. 1306/10262 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 122732 event pairs, 714 based on Foata normal form. 1/9146 useless extension candidates. Maximal degree in co-relation 12159. Up to 418 conditions per place. [2022-07-21 08:56:04,332 INFO L132 encePairwiseOnDemand]: 321/358 looper letters, 222 selfloop transitions, 39 changer transitions 8/498 dead transitions. [2022-07-21 08:56:04,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 498 transitions, 1565 flow [2022-07-21 08:56:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 08:56:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 08:56:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8498 transitions. [2022-07-21 08:56:04,349 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.698159710811699 [2022-07-21 08:56:04,349 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8498 transitions. [2022-07-21 08:56:04,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8498 transitions. [2022-07-21 08:56:04,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:04,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8498 transitions. [2022-07-21 08:56:04,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 249.94117647058823) internal successors, (8498), 34 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:04,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:04,395 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:04,395 INFO L186 Difference]: Start difference. First operand has 320 places, 316 transitions, 638 flow. Second operand 34 states and 8498 transitions. [2022-07-21 08:56:04,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 498 transitions, 1565 flow [2022-07-21 08:56:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 498 transitions, 1565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:56:04,406 INFO L242 Difference]: Finished difference. Result has 363 places, 343 transitions, 865 flow [2022-07-21 08:56:04,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=865, PETRI_PLACES=363, PETRI_TRANSITIONS=343} [2022-07-21 08:56:04,408 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 38 predicate places. [2022-07-21 08:56:04,408 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 343 transitions, 865 flow [2022-07-21 08:56:04,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:04,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:04,410 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:56:04,410 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)] === [2022-07-21 08:56:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 237870383, now seen corresponding path program 2 times [2022-07-21 08:56:04,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642690408] [2022-07-21 08:56:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:05,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:05,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642690408] [2022-07-21 08:56:05,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642690408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:05,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:56:05,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-21 08:56:05,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034310961] [2022-07-21 08:56:05,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:05,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 08:56:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 08:56:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2022-07-21 08:56:05,169 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 358 [2022-07-21 08:56:05,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 343 transitions, 865 flow. Second operand has 28 states, 28 states have (on average 242.53571428571428) internal successors, (6791), 28 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:05,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:05,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 358 [2022-07-21 08:56:05,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:09,471 INFO L129 PetriNetUnfolder]: 2239/16958 cut-off events. [2022-07-21 08:56:09,472 INFO L130 PetriNetUnfolder]: For 1635/1707 co-relation queries the response was YES. [2022-07-21 08:56:09,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21437 conditions, 16958 events. 2239/16958 cut-off events. For 1635/1707 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 221359 event pairs, 1190 based on Foata normal form. 27/15038 useless extension candidates. Maximal degree in co-relation 21415. Up to 500 conditions per place. [2022-07-21 08:56:09,600 INFO L132 encePairwiseOnDemand]: 316/358 looper letters, 271 selfloop transitions, 52 changer transitions 8/558 dead transitions. [2022-07-21 08:56:09,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 558 transitions, 2122 flow [2022-07-21 08:56:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 08:56:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-21 08:56:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 10647 transitions. [2022-07-21 08:56:09,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.691633103806678 [2022-07-21 08:56:09,617 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 10647 transitions. [2022-07-21 08:56:09,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 10647 transitions. [2022-07-21 08:56:09,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:09,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 10647 transitions. [2022-07-21 08:56:09,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 247.6046511627907) internal successors, (10647), 43 states have internal predecessors, (10647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:09,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 358.0) internal successors, (15752), 44 states have internal predecessors, (15752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:09,669 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 358.0) internal successors, (15752), 44 states have internal predecessors, (15752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:09,669 INFO L186 Difference]: Start difference. First operand has 363 places, 343 transitions, 865 flow. Second operand 43 states and 10647 transitions. [2022-07-21 08:56:09,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 558 transitions, 2122 flow [2022-07-21 08:56:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 2077 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-07-21 08:56:09,686 INFO L242 Difference]: Finished difference. Result has 408 places, 359 transitions, 1095 flow [2022-07-21 08:56:09,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1095, PETRI_PLACES=408, PETRI_TRANSITIONS=359} [2022-07-21 08:56:09,689 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 83 predicate places. [2022-07-21 08:56:09,689 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 359 transitions, 1095 flow [2022-07-21 08:56:09,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 242.53571428571428) internal successors, (6791), 28 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:09,691 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:09,691 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:09,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:56:09,692 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)] === [2022-07-21 08:56:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash -30815151, now seen corresponding path program 3 times [2022-07-21 08:56:09,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:09,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99711966] [2022-07-21 08:56:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:09,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:10,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99711966] [2022-07-21 08:56:10,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99711966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:10,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:56:10,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-21 08:56:10,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015222292] [2022-07-21 08:56:10,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:10,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 08:56:10,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 08:56:10,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-21 08:56:10,316 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 358 [2022-07-21 08:56:10,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 359 transitions, 1095 flow. Second operand has 24 states, 24 states have (on average 242.95833333333334) internal successors, (5831), 24 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:10,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:10,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 358 [2022-07-21 08:56:10,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:14,332 INFO L129 PetriNetUnfolder]: 2538/19054 cut-off events. [2022-07-21 08:56:14,332 INFO L130 PetriNetUnfolder]: For 6338/6965 co-relation queries the response was YES. [2022-07-21 08:56:14,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26089 conditions, 19054 events. 2538/19054 cut-off events. For 6338/6965 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 251184 event pairs, 1062 based on Foata normal form. 38/16847 useless extension candidates. Maximal degree in co-relation 26054. Up to 940 conditions per place. [2022-07-21 08:56:14,487 INFO L132 encePairwiseOnDemand]: 318/358 looper letters, 222 selfloop transitions, 58 changer transitions 8/515 dead transitions. [2022-07-21 08:56:14,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 515 transitions, 2254 flow [2022-07-21 08:56:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 08:56:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 08:56:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8416 transitions. [2022-07-21 08:56:14,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6914229378902399 [2022-07-21 08:56:14,497 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8416 transitions. [2022-07-21 08:56:14,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8416 transitions. [2022-07-21 08:56:14,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:14,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8416 transitions. [2022-07-21 08:56:14,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 247.52941176470588) internal successors, (8416), 34 states have internal predecessors, (8416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:14,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:14,523 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:14,524 INFO L186 Difference]: Start difference. First operand has 408 places, 359 transitions, 1095 flow. Second operand 34 states and 8416 transitions. [2022-07-21 08:56:14,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 515 transitions, 2254 flow [2022-07-21 08:56:14,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 515 transitions, 2118 flow, removed 36 selfloop flow, removed 32 redundant places. [2022-07-21 08:56:14,537 INFO L242 Difference]: Finished difference. Result has 414 places, 377 transitions, 1337 flow [2022-07-21 08:56:14,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1337, PETRI_PLACES=414, PETRI_TRANSITIONS=377} [2022-07-21 08:56:14,538 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 89 predicate places. [2022-07-21 08:56:14,539 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 377 transitions, 1337 flow [2022-07-21 08:56:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 242.95833333333334) internal successors, (5831), 24 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:14,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:14,540 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:14,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:56:14,541 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)] === [2022-07-21 08:56:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 608820589, now seen corresponding path program 4 times [2022-07-21 08:56:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:14,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639477715] [2022-07-21 08:56:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:14,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:15,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639477715] [2022-07-21 08:56:15,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639477715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:15,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:56:15,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-21 08:56:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404690566] [2022-07-21 08:56:15,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:15,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 08:56:15,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 08:56:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-07-21 08:56:15,068 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-21 08:56:15,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 377 transitions, 1337 flow. Second operand has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:15,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:15,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-21 08:56:15,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:19,123 INFO L129 PetriNetUnfolder]: 2335/18037 cut-off events. [2022-07-21 08:56:19,124 INFO L130 PetriNetUnfolder]: For 11305/12077 co-relation queries the response was YES. [2022-07-21 08:56:19,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25761 conditions, 18037 events. 2335/18037 cut-off events. For 11305/12077 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 237616 event pairs, 1216 based on Foata normal form. 49/16012 useless extension candidates. Maximal degree in co-relation 25721. Up to 778 conditions per place. [2022-07-21 08:56:19,272 INFO L132 encePairwiseOnDemand]: 321/358 looper letters, 250 selfloop transitions, 60 changer transitions 8/553 dead transitions. [2022-07-21 08:56:19,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 553 transitions, 2605 flow [2022-07-21 08:56:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 08:56:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 08:56:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 9737 transitions. [2022-07-21 08:56:19,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6973929236499069 [2022-07-21 08:56:19,279 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 9737 transitions. [2022-07-21 08:56:19,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 9737 transitions. [2022-07-21 08:56:19,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:19,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 9737 transitions. [2022-07-21 08:56:19,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 249.66666666666666) internal successors, (9737), 39 states have internal predecessors, (9737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:19,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 358.0) internal successors, (14320), 40 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:19,301 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 358.0) internal successors, (14320), 40 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:19,301 INFO L186 Difference]: Start difference. First operand has 414 places, 377 transitions, 1337 flow. Second operand 39 states and 9737 transitions. [2022-07-21 08:56:19,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 553 transitions, 2605 flow [2022-07-21 08:56:19,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 553 transitions, 2455 flow, removed 46 selfloop flow, removed 25 redundant places. [2022-07-21 08:56:19,321 INFO L242 Difference]: Finished difference. Result has 426 places, 381 transitions, 1439 flow [2022-07-21 08:56:19,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1439, PETRI_PLACES=426, PETRI_TRANSITIONS=381} [2022-07-21 08:56:19,322 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 101 predicate places. [2022-07-21 08:56:19,322 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 381 transitions, 1439 flow [2022-07-21 08:56:19,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:19,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:19,324 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:19,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:56:19,324 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)] === [2022-07-21 08:56:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash 477865303, now seen corresponding path program 1 times [2022-07-21 08:56:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:19,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405317748] [2022-07-21 08:56:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:19,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:19,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405317748] [2022-07-21 08:56:19,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405317748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180419850] [2022-07-21 08:56:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:19,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:19,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:56:19,462 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) [2022-07-21 08:56:19,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:56:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 08:56:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:56:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:19,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:56:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:20,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180419850] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:20,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:56:20,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-07-21 08:56:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508711366] [2022-07-21 08:56:20,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:20,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:56:20,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:56:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-07-21 08:56:20,129 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 358 [2022-07-21 08:56:20,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 381 transitions, 1439 flow. Second operand has 13 states, 13 states have (on average 251.46153846153845) internal successors, (3269), 13 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:20,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:20,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 358 [2022-07-21 08:56:20,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:23,251 INFO L129 PetriNetUnfolder]: 2463/20707 cut-off events. [2022-07-21 08:56:23,252 INFO L130 PetriNetUnfolder]: For 11281/11815 co-relation queries the response was YES. [2022-07-21 08:56:23,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29091 conditions, 20707 events. 2463/20707 cut-off events. For 11281/11815 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 283339 event pairs, 1534 based on Foata normal form. 17/18444 useless extension candidates. Maximal degree in co-relation 29051. Up to 2277 conditions per place. [2022-07-21 08:56:23,407 INFO L132 encePairwiseOnDemand]: 336/358 looper letters, 193 selfloop transitions, 35 changer transitions 6/485 dead transitions. [2022-07-21 08:56:23,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 485 transitions, 2248 flow [2022-07-21 08:56:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:56:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:56:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4632 transitions. [2022-07-21 08:56:23,412 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7188081936685289 [2022-07-21 08:56:23,412 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4632 transitions. [2022-07-21 08:56:23,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4632 transitions. [2022-07-21 08:56:23,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:23,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4632 transitions. [2022-07-21 08:56:23,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 257.3333333333333) internal successors, (4632), 18 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:23,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 358.0) internal successors, (6802), 19 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:23,424 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 358.0) internal successors, (6802), 19 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:23,424 INFO L186 Difference]: Start difference. First operand has 426 places, 381 transitions, 1439 flow. Second operand 18 states and 4632 transitions. [2022-07-21 08:56:23,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 485 transitions, 2248 flow [2022-07-21 08:56:23,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 485 transitions, 2139 flow, removed 8 selfloop flow, removed 35 redundant places. [2022-07-21 08:56:23,448 INFO L242 Difference]: Finished difference. Result has 413 places, 396 transitions, 1522 flow [2022-07-21 08:56:23,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1522, PETRI_PLACES=413, PETRI_TRANSITIONS=396} [2022-07-21 08:56:23,450 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 88 predicate places. [2022-07-21 08:56:23,450 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 396 transitions, 1522 flow [2022-07-21 08:56:23,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 251.46153846153845) internal successors, (3269), 13 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:23,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:23,451 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:23,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 08:56:23,667 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,SelfDestructingSolverStorable5 [2022-07-21 08:56:23,668 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)] === [2022-07-21 08:56:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1947793187, now seen corresponding path program 1 times [2022-07-21 08:56:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625985039] [2022-07-21 08:56:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:23,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:23,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:23,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625985039] [2022-07-21 08:56:23,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625985039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:23,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962260434] [2022-07-21 08:56:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:23,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:56:23,924 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) [2022-07-21 08:56:23,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:56:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 08:56:24,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:56:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:24,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:56:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:25,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962260434] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:25,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:56:25,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19, 18] total 36 [2022-07-21 08:56:25,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521357778] [2022-07-21 08:56:25,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:25,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:56:25,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:25,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:56:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 08:56:25,361 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-21 08:56:25,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 396 transitions, 1522 flow. Second operand has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:25,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:25,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-21 08:56:25,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:29,110 INFO L129 PetriNetUnfolder]: 2778/21706 cut-off events. [2022-07-21 08:56:29,110 INFO L130 PetriNetUnfolder]: For 15030/16056 co-relation queries the response was YES. [2022-07-21 08:56:29,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31287 conditions, 21706 events. 2778/21706 cut-off events. For 15030/16056 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 295935 event pairs, 1654 based on Foata normal form. 17/19214 useless extension candidates. Maximal degree in co-relation 31243. Up to 1162 conditions per place. [2022-07-21 08:56:29,424 INFO L132 encePairwiseOnDemand]: 328/358 looper letters, 237 selfloop transitions, 52 changer transitions 8/533 dead transitions. [2022-07-21 08:56:29,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 533 transitions, 2621 flow [2022-07-21 08:56:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:56:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:56:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7520 transitions. [2022-07-21 08:56:29,430 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7001862197392924 [2022-07-21 08:56:29,430 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7520 transitions. [2022-07-21 08:56:29,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7520 transitions. [2022-07-21 08:56:29,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:29,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7520 transitions. [2022-07-21 08:56:29,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 250.66666666666666) internal successors, (7520), 30 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:29,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:29,451 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:29,451 INFO L186 Difference]: Start difference. First operand has 413 places, 396 transitions, 1522 flow. Second operand 30 states and 7520 transitions. [2022-07-21 08:56:29,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 533 transitions, 2621 flow [2022-07-21 08:56:29,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 533 transitions, 2555 flow, removed 23 selfloop flow, removed 8 redundant places. [2022-07-21 08:56:29,476 INFO L242 Difference]: Finished difference. Result has 440 places, 406 transitions, 1715 flow [2022-07-21 08:56:29,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1715, PETRI_PLACES=440, PETRI_TRANSITIONS=406} [2022-07-21 08:56:29,477 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 115 predicate places. [2022-07-21 08:56:29,477 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 406 transitions, 1715 flow [2022-07-21 08:56:29,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:29,478 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:29,478 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:29,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:56:29,691 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,SelfDestructingSolverStorable6 [2022-07-21 08:56:29,691 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)] === [2022-07-21 08:56:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1532582343, now seen corresponding path program 2 times [2022-07-21 08:56:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690605003] [2022-07-21 08:56:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:29,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690605003] [2022-07-21 08:56:29,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690605003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009165721] [2022-07-21 08:56:29,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:56:29,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:29,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:56:29,895 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) [2022-07-21 08:56:29,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:56:29,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 08:56:29,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:56:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:56:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:56:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:56:30,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:56:30,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009165721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:30,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:56:30,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 25 [2022-07-21 08:56:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119869112] [2022-07-21 08:56:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:30,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:56:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:56:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-21 08:56:30,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 358 [2022-07-21 08:56:30,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 406 transitions, 1715 flow. Second operand has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:30,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:30,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 358 [2022-07-21 08:56:30,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:34,843 INFO L129 PetriNetUnfolder]: 4588/33990 cut-off events. [2022-07-21 08:56:34,843 INFO L130 PetriNetUnfolder]: For 34351/36547 co-relation queries the response was YES. [2022-07-21 08:56:35,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51207 conditions, 33990 events. 4588/33990 cut-off events. For 34351/36547 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 501207 event pairs, 1070 based on Foata normal form. 118/29850 useless extension candidates. Maximal degree in co-relation 51158. Up to 2646 conditions per place. [2022-07-21 08:56:35,231 INFO L132 encePairwiseOnDemand]: 345/358 looper letters, 155 selfloop transitions, 42 changer transitions 8/493 dead transitions. [2022-07-21 08:56:35,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 493 transitions, 2717 flow [2022-07-21 08:56:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:56:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:56:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3062 transitions. [2022-07-21 08:56:35,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7775520568816658 [2022-07-21 08:56:35,234 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3062 transitions. [2022-07-21 08:56:35,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3062 transitions. [2022-07-21 08:56:35,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:35,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3062 transitions. [2022-07-21 08:56:35,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 278.3636363636364) internal successors, (3062), 11 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:35,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:35,240 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:35,241 INFO L186 Difference]: Start difference. First operand has 440 places, 406 transitions, 1715 flow. Second operand 11 states and 3062 transitions. [2022-07-21 08:56:35,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 493 transitions, 2717 flow [2022-07-21 08:56:35,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 493 transitions, 2604 flow, removed 40 selfloop flow, removed 15 redundant places. [2022-07-21 08:56:35,457 INFO L242 Difference]: Finished difference. Result has 442 places, 430 transitions, 2090 flow [2022-07-21 08:56:35,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2090, PETRI_PLACES=442, PETRI_TRANSITIONS=430} [2022-07-21 08:56:35,460 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 117 predicate places. [2022-07-21 08:56:35,460 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 430 transitions, 2090 flow [2022-07-21 08:56:35,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:35,461 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:35,461 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:35,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:56:35,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:35,675 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)] === [2022-07-21 08:56:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1171108207, now seen corresponding path program 3 times [2022-07-21 08:56:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:35,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386453099] [2022-07-21 08:56:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:35,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:35,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386453099] [2022-07-21 08:56:35,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386453099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667687653] [2022-07-21 08:56:35,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:56:35,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:56:35,901 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) [2022-07-21 08:56:35,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:56:35,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-21 08:56:35,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:56:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:56:36,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:56:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:56:36,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:56:36,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667687653] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:56:36,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:56:36,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 25 [2022-07-21 08:56:36,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295561390] [2022-07-21 08:56:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:36,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:56:36,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:56:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-21 08:56:36,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 358 [2022-07-21 08:56:36,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 430 transitions, 2090 flow. Second operand has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:36,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:36,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 358 [2022-07-21 08:56:36,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:41,543 INFO L129 PetriNetUnfolder]: 4914/36468 cut-off events. [2022-07-21 08:56:41,543 INFO L130 PetriNetUnfolder]: For 53839/57184 co-relation queries the response was YES. [2022-07-21 08:56:41,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58571 conditions, 36468 events. 4914/36468 cut-off events. For 53839/57184 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 543135 event pairs, 1113 based on Foata normal form. 171/31940 useless extension candidates. Maximal degree in co-relation 58514. Up to 3204 conditions per place. [2022-07-21 08:56:41,966 INFO L132 encePairwiseOnDemand]: 345/358 looper letters, 166 selfloop transitions, 51 changer transitions 8/513 dead transitions. [2022-07-21 08:56:41,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 513 transitions, 3164 flow [2022-07-21 08:56:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:56:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:56:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3061 transitions. [2022-07-21 08:56:41,969 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772981208735399 [2022-07-21 08:56:41,969 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3061 transitions. [2022-07-21 08:56:41,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3061 transitions. [2022-07-21 08:56:41,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:41,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3061 transitions. [2022-07-21 08:56:41,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 278.27272727272725) internal successors, (3061), 11 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:41,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:41,975 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:41,975 INFO L186 Difference]: Start difference. First operand has 442 places, 430 transitions, 2090 flow. Second operand 11 states and 3061 transitions. [2022-07-21 08:56:41,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 513 transitions, 3164 flow [2022-07-21 08:56:42,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 513 transitions, 3049 flow, removed 41 selfloop flow, removed 7 redundant places. [2022-07-21 08:56:42,069 INFO L242 Difference]: Finished difference. Result has 448 places, 456 transitions, 2554 flow [2022-07-21 08:56:42,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2554, PETRI_PLACES=448, PETRI_TRANSITIONS=456} [2022-07-21 08:56:42,071 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 123 predicate places. [2022-07-21 08:56:42,071 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 456 transitions, 2554 flow [2022-07-21 08:56:42,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:42,071 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:42,072 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:42,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:56:42,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:42,288 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)] === [2022-07-21 08:56:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash -670238449, now seen corresponding path program 4 times [2022-07-21 08:56:42,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:42,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469401185] [2022-07-21 08:56:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:42,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:42,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469401185] [2022-07-21 08:56:42,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469401185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812058861] [2022-07-21 08:56:42,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 08:56:42,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:56:42,500 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) [2022-07-21 08:56:42,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:56:42,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 08:56:42,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:56:42,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 08:56:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:56:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:43,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:56:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:43,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812058861] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:43,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:56:43,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19, 18] total 36 [2022-07-21 08:56:43,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964420313] [2022-07-21 08:56:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:43,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:56:43,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:43,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:56:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 08:56:43,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-21 08:56:43,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 456 transitions, 2554 flow. Second operand has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:43,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:43,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-21 08:56:43,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:56:49,900 INFO L129 PetriNetUnfolder]: 4742/37746 cut-off events. [2022-07-21 08:56:49,900 INFO L130 PetriNetUnfolder]: For 66491/69757 co-relation queries the response was YES. [2022-07-21 08:56:50,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60345 conditions, 37746 events. 4742/37746 cut-off events. For 66491/69757 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 564933 event pairs, 2511 based on Foata normal form. 114/33311 useless extension candidates. Maximal degree in co-relation 60285. Up to 2073 conditions per place. [2022-07-21 08:56:50,463 INFO L132 encePairwiseOnDemand]: 328/358 looper letters, 275 selfloop transitions, 67 changer transitions 8/603 dead transitions. [2022-07-21 08:56:50,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 603 transitions, 4125 flow [2022-07-21 08:56:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:56:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:56:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7521 transitions. [2022-07-21 08:56:50,469 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7002793296089386 [2022-07-21 08:56:50,469 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7521 transitions. [2022-07-21 08:56:50,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7521 transitions. [2022-07-21 08:56:50,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:56:50,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7521 transitions. [2022-07-21 08:56:50,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 250.7) internal successors, (7521), 30 states have internal predecessors, (7521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:50,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:50,483 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:50,483 INFO L186 Difference]: Start difference. First operand has 448 places, 456 transitions, 2554 flow. Second operand 30 states and 7521 transitions. [2022-07-21 08:56:50,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 603 transitions, 4125 flow [2022-07-21 08:56:50,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 603 transitions, 3953 flow, removed 86 selfloop flow, removed 6 redundant places. [2022-07-21 08:56:50,606 INFO L242 Difference]: Finished difference. Result has 470 places, 467 transitions, 2840 flow [2022-07-21 08:56:50,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2840, PETRI_PLACES=470, PETRI_TRANSITIONS=467} [2022-07-21 08:56:50,607 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 145 predicate places. [2022-07-21 08:56:50,607 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 467 transitions, 2840 flow [2022-07-21 08:56:50,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:50,607 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:56:50,608 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:56:50,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:56:50,809 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,SelfDestructingSolverStorable9 [2022-07-21 08:56:50,810 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)] === [2022-07-21 08:56:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:56:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash -546337380, now seen corresponding path program 1 times [2022-07-21 08:56:50,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:56:50,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419410046] [2022-07-21 08:56:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:56:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:56:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419410046] [2022-07-21 08:56:50,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419410046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166910675] [2022-07-21 08:56:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:56:50,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:56:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:56:50,937 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) [2022-07-21 08:56:50,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:56:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:56:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 08:56:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:56:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:51,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:56:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:56:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166910675] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:56:51,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:56:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-07-21 08:56:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061924508] [2022-07-21 08:56:51,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:56:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:56:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:56:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:56:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-07-21 08:56:51,529 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 358 [2022-07-21 08:56:51,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 467 transitions, 2840 flow. Second operand has 13 states, 13 states have (on average 251.46153846153845) internal successors, (3269), 13 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:56:51,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:56:51,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 358 [2022-07-21 08:56:51,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand