./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 791161d1 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-?-791161d [2022-07-22 21:38:00,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:38:00,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:38:00,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:38:00,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:38:00,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:38:00,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:38:00,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:38:00,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:38:00,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:38:00,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:38:00,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:38:00,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:38:00,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:38:00,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:38:00,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:38:00,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:38:00,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:38:00,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:38:00,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:38:00,398 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:38:00,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:38:00,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:38:00,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:38:00,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:38:00,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:38:00,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:38:00,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:38:00,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:38:00,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:38:00,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:38:00,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:38:00,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:38:00,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:38:00,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:38:00,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:38:00,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:38:00,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:38:00,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:38:00,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:38:00,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:38:00,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:38:00,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:38:00,453 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:38:00,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:38:00,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:38:00,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:38:00,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:38:00,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:38:00,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:38:00,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:38:00,456 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:38:00,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:38:00,457 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:38:00,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:38:00,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:38:00,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:38:00,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:38:00,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:38:00,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:38:00,458 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:38:00,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:38:00,460 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:38:00,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:38:00,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:38:00,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:38:00,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:38:00,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:38:00,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:38:00,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:38:00,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:38:00,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:38:00,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:38:00,463 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:38:00,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:38:00,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:38:00,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-07-22 21:38:00,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:38:00,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:38:00,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:38:00,741 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:38:00,741 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:38:00,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-07-22 21:38:00,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032f193e/7789ae4576cd4f20804240960ad7524f/FLAGb9bd3de82 [2022-07-22 21:38:01,243 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:38:01,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-07-22 21:38:01,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032f193e/7789ae4576cd4f20804240960ad7524f/FLAGb9bd3de82 [2022-07-22 21:38:01,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032f193e/7789ae4576cd4f20804240960ad7524f [2022-07-22 21:38:01,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:38:01,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:38:01,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:38:01,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:38:01,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:38:01,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:01,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a6515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01, skipping insertion in model container [2022-07-22 21:38:01,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:01,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:38:01,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:38:01,861 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] [2022-07-22 21:38:01,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:38:01,878 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:38:01,900 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] [2022-07-22 21:38:01,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:38:01,916 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:38:01,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01 WrapperNode [2022-07-22 21:38:01,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:38:01,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:38:01,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:38:01,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:38:01,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:01,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:01,982 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 281 [2022-07-22 21:38:01,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:38:01,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:38:01,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:38:01,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:38:01,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:01,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:01,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:01,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:02,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:02,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:02,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:02,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:38:02,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:38:02,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:38:02,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:38:02,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (1/1) ... [2022-07-22 21:38:02,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:38:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:02,057 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) [2022-07-22 21:38:02,059 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 [2022-07-22 21:38:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:38:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:38:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:38:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:38:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:38:02,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:38:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:38:02,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:38:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:38:02,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:38:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:38:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:38:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:38:02,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:38:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:38:02,093 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:38:02,201 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:38:02,203 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:38:02,566 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:38:02,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:38:02,577 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:38:02,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:38:02 BoogieIcfgContainer [2022-07-22 21:38:02,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:38:02,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:38:02,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:38:02,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:38:02,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:38:01" (1/3) ... [2022-07-22 21:38:02,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87918d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:38:02, skipping insertion in model container [2022-07-22 21:38:02,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:01" (2/3) ... [2022-07-22 21:38:02,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87918d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:38:02, skipping insertion in model container [2022-07-22 21:38:02,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:38:02" (3/3) ... [2022-07-22 21:38:02,587 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2022-07-22 21:38:02,592 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:38:02,600 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:38:02,601 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:38:02,601 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:38:02,716 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:38:02,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 339 places, 358 transitions, 740 flow [2022-07-22 21:38:02,940 INFO L129 PetriNetUnfolder]: 29/355 cut-off events. [2022-07-22 21:38:02,940 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:38:02,950 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. [2022-07-22 21:38:02,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 358 transitions, 740 flow [2022-07-22 21:38:02,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 325 places, 344 transitions, 706 flow [2022-07-22 21:38:02,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:38:02,986 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@6ca0f381, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c3e0057 [2022-07-22 21:38:02,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:38:03,058 INFO L129 PetriNetUnfolder]: 29/343 cut-off events. [2022-07-22 21:38:03,058 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:38:03,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:03,059 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] [2022-07-22 21:38:03,061 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)] === [2022-07-22 21:38:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1953458268, now seen corresponding path program 1 times [2022-07-22 21:38:03,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:03,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413313654] [2022-07-22 21:38:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:03,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:03,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413313654] [2022-07-22 21:38:03,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413313654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:03,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:03,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:38:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936593826] [2022-07-22 21:38:03,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:03,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:38:03,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:38:03,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:38:03,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 358 [2022-07-22 21:38:03,382 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) [2022-07-22 21:38:03,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:03,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 358 [2022-07-22 21:38:03,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:03,466 INFO L129 PetriNetUnfolder]: 9/324 cut-off events. [2022-07-22 21:38:03,467 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-22 21:38:03,470 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. [2022-07-22 21:38:03,473 INFO L132 encePairwiseOnDemand]: 338/358 looper letters, 6 selfloop transitions, 0 changer transitions 8/324 dead transitions. [2022-07-22 21:38:03,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 324 transitions, 678 flow [2022-07-22 21:38:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:38:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:38:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 688 transitions. [2022-07-22 21:38:03,492 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9608938547486033 [2022-07-22 21:38:03,501 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 688 transitions. [2022-07-22 21:38:03,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 688 transitions. [2022-07-22 21:38:03,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:03,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 688 transitions. [2022-07-22 21:38:03,513 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) [2022-07-22 21:38:03,524 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) [2022-07-22 21:38:03,525 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) [2022-07-22 21:38:03,527 INFO L186 Difference]: Start difference. First operand has 325 places, 344 transitions, 706 flow. Second operand 2 states and 688 transitions. [2022-07-22 21:38:03,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 324 transitions, 678 flow [2022-07-22 21:38:03,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 324 transitions, 666 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:38:03,542 INFO L242 Difference]: Finished difference. Result has 320 places, 316 transitions, 638 flow [2022-07-22 21:38:03,545 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} [2022-07-22 21:38:03,548 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, -5 predicate places. [2022-07-22 21:38:03,548 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 316 transitions, 638 flow [2022-07-22 21:38:03,549 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) [2022-07-22 21:38:03,549 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:03,550 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] [2022-07-22 21:38:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:38:03,550 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)] === [2022-07-22 21:38:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1280046237, now seen corresponding path program 1 times [2022-07-22 21:38:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807092970] [2022-07-22 21:38:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:04,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807092970] [2022-07-22 21:38:04,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807092970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:04,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:04,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-22 21:38:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524956025] [2022-07-22 21:38:04,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 21:38:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 21:38:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-07-22 21:38:04,832 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-22 21:38:04,844 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) [2022-07-22 21:38:04,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:04,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-22 21:38:04,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:08,433 INFO L129 PetriNetUnfolder]: 1306/10262 cut-off events. [2022-07-22 21:38:08,434 INFO L130 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2022-07-22 21:38:08,482 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. [2022-07-22 21:38:08,526 INFO L132 encePairwiseOnDemand]: 321/358 looper letters, 222 selfloop transitions, 39 changer transitions 8/498 dead transitions. [2022-07-22 21:38:08,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 498 transitions, 1565 flow [2022-07-22 21:38:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 21:38:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-22 21:38:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8498 transitions. [2022-07-22 21:38:08,544 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.698159710811699 [2022-07-22 21:38:08,545 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8498 transitions. [2022-07-22 21:38:08,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8498 transitions. [2022-07-22 21:38:08,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:08,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8498 transitions. [2022-07-22 21:38:08,599 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) [2022-07-22 21:38:08,624 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) [2022-07-22 21:38:08,630 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) [2022-07-22 21:38:08,630 INFO L186 Difference]: Start difference. First operand has 320 places, 316 transitions, 638 flow. Second operand 34 states and 8498 transitions. [2022-07-22 21:38:08,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 498 transitions, 1565 flow [2022-07-22 21:38:08,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 498 transitions, 1565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:38:08,640 INFO L242 Difference]: Finished difference. Result has 363 places, 343 transitions, 865 flow [2022-07-22 21:38:08,641 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} [2022-07-22 21:38:08,642 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 38 predicate places. [2022-07-22 21:38:08,642 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 343 transitions, 865 flow [2022-07-22 21:38:08,644 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) [2022-07-22 21:38:08,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:08,645 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] [2022-07-22 21:38:08,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:38:08,646 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)] === [2022-07-22 21:38:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash 237870383, now seen corresponding path program 2 times [2022-07-22 21:38:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:08,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156875191] [2022-07-22 21:38:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:09,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156875191] [2022-07-22 21:38:09,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156875191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:09,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:09,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-22 21:38:09,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4329696] [2022-07-22 21:38:09,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:09,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 21:38:09,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 21:38:09,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2022-07-22 21:38:09,611 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 358 [2022-07-22 21:38:09,617 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) [2022-07-22 21:38:09,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:09,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 358 [2022-07-22 21:38:09,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:14,811 INFO L129 PetriNetUnfolder]: 2239/16958 cut-off events. [2022-07-22 21:38:14,812 INFO L130 PetriNetUnfolder]: For 1635/1707 co-relation queries the response was YES. [2022-07-22 21:38:14,935 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. [2022-07-22 21:38:14,986 INFO L132 encePairwiseOnDemand]: 316/358 looper letters, 271 selfloop transitions, 52 changer transitions 8/558 dead transitions. [2022-07-22 21:38:14,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 558 transitions, 2122 flow [2022-07-22 21:38:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 21:38:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-22 21:38:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 10647 transitions. [2022-07-22 21:38:15,011 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.691633103806678 [2022-07-22 21:38:15,012 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 10647 transitions. [2022-07-22 21:38:15,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 10647 transitions. [2022-07-22 21:38:15,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:15,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 10647 transitions. [2022-07-22 21:38:15,055 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) [2022-07-22 21:38:15,084 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) [2022-07-22 21:38:15,090 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) [2022-07-22 21:38:15,090 INFO L186 Difference]: Start difference. First operand has 363 places, 343 transitions, 865 flow. Second operand 43 states and 10647 transitions. [2022-07-22 21:38:15,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 558 transitions, 2122 flow [2022-07-22 21:38:15,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 2077 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-07-22 21:38:15,111 INFO L242 Difference]: Finished difference. Result has 408 places, 359 transitions, 1095 flow [2022-07-22 21:38:15,112 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} [2022-07-22 21:38:15,114 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 83 predicate places. [2022-07-22 21:38:15,114 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 359 transitions, 1095 flow [2022-07-22 21:38:15,116 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) [2022-07-22 21:38:15,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:15,116 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] [2022-07-22 21:38:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:38:15,117 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)] === [2022-07-22 21:38:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -30815151, now seen corresponding path program 3 times [2022-07-22 21:38:15,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:15,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796684409] [2022-07-22 21:38:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:15,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:15,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796684409] [2022-07-22 21:38:15,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796684409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:15,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:15,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-22 21:38:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389749351] [2022-07-22 21:38:15,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:38:15,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:38:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:38:15,789 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 358 [2022-07-22 21:38:15,793 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) [2022-07-22 21:38:15,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:15,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 358 [2022-07-22 21:38:15,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:20,232 INFO L129 PetriNetUnfolder]: 2538/19054 cut-off events. [2022-07-22 21:38:20,233 INFO L130 PetriNetUnfolder]: For 6338/6965 co-relation queries the response was YES. [2022-07-22 21:38:20,369 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. [2022-07-22 21:38:20,428 INFO L132 encePairwiseOnDemand]: 318/358 looper letters, 222 selfloop transitions, 58 changer transitions 8/515 dead transitions. [2022-07-22 21:38:20,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 515 transitions, 2254 flow [2022-07-22 21:38:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 21:38:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-22 21:38:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8416 transitions. [2022-07-22 21:38:20,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6914229378902399 [2022-07-22 21:38:20,445 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8416 transitions. [2022-07-22 21:38:20,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8416 transitions. [2022-07-22 21:38:20,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:20,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8416 transitions. [2022-07-22 21:38:20,469 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) [2022-07-22 21:38:20,487 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) [2022-07-22 21:38:20,490 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) [2022-07-22 21:38:20,490 INFO L186 Difference]: Start difference. First operand has 408 places, 359 transitions, 1095 flow. Second operand 34 states and 8416 transitions. [2022-07-22 21:38:20,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 515 transitions, 2254 flow [2022-07-22 21:38:20,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 515 transitions, 2118 flow, removed 36 selfloop flow, removed 32 redundant places. [2022-07-22 21:38:20,511 INFO L242 Difference]: Finished difference. Result has 414 places, 377 transitions, 1337 flow [2022-07-22 21:38:20,512 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} [2022-07-22 21:38:20,515 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 89 predicate places. [2022-07-22 21:38:20,515 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 377 transitions, 1337 flow [2022-07-22 21:38:20,517 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) [2022-07-22 21:38:20,517 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:20,517 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] [2022-07-22 21:38:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:38:20,518 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)] === [2022-07-22 21:38:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash 608820589, now seen corresponding path program 4 times [2022-07-22 21:38:20,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:20,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087359885] [2022-07-22 21:38:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:21,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:21,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087359885] [2022-07-22 21:38:21,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087359885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:21,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:21,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-22 21:38:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471981543] [2022-07-22 21:38:21,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:21,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 21:38:21,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 21:38:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-07-22 21:38:21,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-22 21:38:21,182 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) [2022-07-22 21:38:21,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:21,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-22 21:38:21,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:25,524 INFO L129 PetriNetUnfolder]: 2335/18037 cut-off events. [2022-07-22 21:38:25,524 INFO L130 PetriNetUnfolder]: For 11305/12077 co-relation queries the response was YES. [2022-07-22 21:38:25,641 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. [2022-07-22 21:38:25,702 INFO L132 encePairwiseOnDemand]: 321/358 looper letters, 250 selfloop transitions, 60 changer transitions 8/553 dead transitions. [2022-07-22 21:38:25,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 553 transitions, 2605 flow [2022-07-22 21:38:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 21:38:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-22 21:38:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 9737 transitions. [2022-07-22 21:38:25,713 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6973929236499069 [2022-07-22 21:38:25,713 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 9737 transitions. [2022-07-22 21:38:25,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 9737 transitions. [2022-07-22 21:38:25,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:25,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 9737 transitions. [2022-07-22 21:38:25,728 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) [2022-07-22 21:38:25,936 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) [2022-07-22 21:38:25,939 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) [2022-07-22 21:38:25,940 INFO L186 Difference]: Start difference. First operand has 414 places, 377 transitions, 1337 flow. Second operand 39 states and 9737 transitions. [2022-07-22 21:38:25,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 553 transitions, 2605 flow [2022-07-22 21:38:25,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 553 transitions, 2455 flow, removed 46 selfloop flow, removed 25 redundant places. [2022-07-22 21:38:25,974 INFO L242 Difference]: Finished difference. Result has 426 places, 381 transitions, 1439 flow [2022-07-22 21:38:25,975 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} [2022-07-22 21:38:25,977 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 101 predicate places. [2022-07-22 21:38:25,978 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 381 transitions, 1439 flow [2022-07-22 21:38:25,979 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) [2022-07-22 21:38:25,979 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:25,980 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] [2022-07-22 21:38:25,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:38:25,980 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)] === [2022-07-22 21:38:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 477865303, now seen corresponding path program 1 times [2022-07-22 21:38:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:25,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331440403] [2022-07-22 21:38:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:26,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:26,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331440403] [2022-07-22 21:38:26,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331440403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:26,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492142346] [2022-07-22 21:38:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:26,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:26,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:26,182 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) [2022-07-22 21:38:26,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:38:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:38:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:26,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:27,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492142346] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:27,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:27,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-07-22 21:38:27,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456443036] [2022-07-22 21:38:27,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:27,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:38:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:38:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-07-22 21:38:27,117 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 358 [2022-07-22 21:38:27,119 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) [2022-07-22 21:38:27,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:27,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 358 [2022-07-22 21:38:27,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:30,600 INFO L129 PetriNetUnfolder]: 2463/20707 cut-off events. [2022-07-22 21:38:30,601 INFO L130 PetriNetUnfolder]: For 11281/11815 co-relation queries the response was YES. [2022-07-22 21:38:30,777 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. [2022-07-22 21:38:30,840 INFO L132 encePairwiseOnDemand]: 336/358 looper letters, 193 selfloop transitions, 35 changer transitions 6/485 dead transitions. [2022-07-22 21:38:30,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 485 transitions, 2248 flow [2022-07-22 21:38:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:38:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:38:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4632 transitions. [2022-07-22 21:38:30,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7188081936685289 [2022-07-22 21:38:30,851 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4632 transitions. [2022-07-22 21:38:30,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4632 transitions. [2022-07-22 21:38:30,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:30,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4632 transitions. [2022-07-22 21:38:30,860 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) [2022-07-22 21:38:30,870 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) [2022-07-22 21:38:30,872 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) [2022-07-22 21:38:30,873 INFO L186 Difference]: Start difference. First operand has 426 places, 381 transitions, 1439 flow. Second operand 18 states and 4632 transitions. [2022-07-22 21:38:30,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 485 transitions, 2248 flow [2022-07-22 21:38:30,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 485 transitions, 2139 flow, removed 8 selfloop flow, removed 35 redundant places. [2022-07-22 21:38:30,907 INFO L242 Difference]: Finished difference. Result has 413 places, 396 transitions, 1522 flow [2022-07-22 21:38:30,908 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} [2022-07-22 21:38:30,910 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 88 predicate places. [2022-07-22 21:38:30,911 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 396 transitions, 1522 flow [2022-07-22 21:38:30,914 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) [2022-07-22 21:38:30,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:30,914 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] [2022-07-22 21:38:30,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:31,128 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 [2022-07-22 21:38:31,128 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)] === [2022-07-22 21:38:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:31,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1947793187, now seen corresponding path program 1 times [2022-07-22 21:38:31,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:31,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953319231] [2022-07-22 21:38:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:31,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:31,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953319231] [2022-07-22 21:38:31,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953319231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459090927] [2022-07-22 21:38:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:31,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:31,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:31,431 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) [2022-07-22 21:38:31,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:38:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:38:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:32,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:33,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459090927] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:33,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:33,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19, 18] total 36 [2022-07-22 21:38:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396563401] [2022-07-22 21:38:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:38:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:38:33,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 21:38:33,389 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-22 21:38:33,393 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) [2022-07-22 21:38:33,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:33,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-22 21:38:33,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:37,473 INFO L129 PetriNetUnfolder]: 2778/21706 cut-off events. [2022-07-22 21:38:37,474 INFO L130 PetriNetUnfolder]: For 15030/16056 co-relation queries the response was YES. [2022-07-22 21:38:37,707 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. [2022-07-22 21:38:37,766 INFO L132 encePairwiseOnDemand]: 328/358 looper letters, 237 selfloop transitions, 52 changer transitions 8/533 dead transitions. [2022-07-22 21:38:37,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 533 transitions, 2621 flow [2022-07-22 21:38:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:38:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:38:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7520 transitions. [2022-07-22 21:38:37,776 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7001862197392924 [2022-07-22 21:38:37,776 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7520 transitions. [2022-07-22 21:38:37,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7520 transitions. [2022-07-22 21:38:37,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:37,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7520 transitions. [2022-07-22 21:38:37,791 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) [2022-07-22 21:38:37,802 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) [2022-07-22 21:38:37,804 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) [2022-07-22 21:38:37,804 INFO L186 Difference]: Start difference. First operand has 413 places, 396 transitions, 1522 flow. Second operand 30 states and 7520 transitions. [2022-07-22 21:38:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 533 transitions, 2621 flow [2022-07-22 21:38:37,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 533 transitions, 2555 flow, removed 23 selfloop flow, removed 8 redundant places. [2022-07-22 21:38:37,843 INFO L242 Difference]: Finished difference. Result has 440 places, 406 transitions, 1715 flow [2022-07-22 21:38:37,844 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} [2022-07-22 21:38:37,844 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 115 predicate places. [2022-07-22 21:38:37,845 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 406 transitions, 1715 flow [2022-07-22 21:38:37,846 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) [2022-07-22 21:38:37,846 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:37,846 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] [2022-07-22 21:38:37,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:38,055 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 [2022-07-22 21:38:38,056 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)] === [2022-07-22 21:38:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:38,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1532582343, now seen corresponding path program 2 times [2022-07-22 21:38:38,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:38,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113876411] [2022-07-22 21:38:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:38,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:38,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113876411] [2022-07-22 21:38:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113876411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932921750] [2022-07-22 21:38:38,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:38:38,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:38,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:38,376 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) [2022-07-22 21:38:38,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:38:38,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:38:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:38:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:38:38,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:38,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:38:38,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932921750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:38,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:38:38,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 25 [2022-07-22 21:38:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656057508] [2022-07-22 21:38:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:38:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:38:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-22 21:38:38,713 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 358 [2022-07-22 21:38:38,715 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) [2022-07-22 21:38:38,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:38,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 358 [2022-07-22 21:38:38,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:44,213 INFO L129 PetriNetUnfolder]: 4588/33990 cut-off events. [2022-07-22 21:38:44,214 INFO L130 PetriNetUnfolder]: For 34351/36547 co-relation queries the response was YES. [2022-07-22 21:38:44,629 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. [2022-07-22 21:38:44,716 INFO L132 encePairwiseOnDemand]: 345/358 looper letters, 155 selfloop transitions, 42 changer transitions 8/493 dead transitions. [2022-07-22 21:38:44,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 493 transitions, 2717 flow [2022-07-22 21:38:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:38:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:38:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3062 transitions. [2022-07-22 21:38:44,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7775520568816658 [2022-07-22 21:38:44,720 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3062 transitions. [2022-07-22 21:38:44,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3062 transitions. [2022-07-22 21:38:44,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:44,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3062 transitions. [2022-07-22 21:38:44,725 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) [2022-07-22 21:38:44,729 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) [2022-07-22 21:38:44,729 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) [2022-07-22 21:38:44,730 INFO L186 Difference]: Start difference. First operand has 440 places, 406 transitions, 1715 flow. Second operand 11 states and 3062 transitions. [2022-07-22 21:38:44,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 493 transitions, 2717 flow [2022-07-22 21:38:44,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 493 transitions, 2604 flow, removed 40 selfloop flow, removed 15 redundant places. [2022-07-22 21:38:44,801 INFO L242 Difference]: Finished difference. Result has 442 places, 430 transitions, 2090 flow [2022-07-22 21:38:44,802 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} [2022-07-22 21:38:44,803 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 117 predicate places. [2022-07-22 21:38:44,803 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 430 transitions, 2090 flow [2022-07-22 21:38:44,803 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) [2022-07-22 21:38:44,804 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:44,804 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] [2022-07-22 21:38:44,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:45,019 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 [2022-07-22 21:38:45,020 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)] === [2022-07-22 21:38:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1171108207, now seen corresponding path program 3 times [2022-07-22 21:38:45,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:45,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802027696] [2022-07-22 21:38:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:45,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802027696] [2022-07-22 21:38:45,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802027696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412386674] [2022-07-22 21:38:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:38:45,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:45,308 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) [2022-07-22 21:38:45,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:38:45,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-22 21:38:45,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:38:45,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:38:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:45,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:38:45,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412386674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:45,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:38:45,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 25 [2022-07-22 21:38:45,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599007415] [2022-07-22 21:38:45,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:45,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:38:45,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:38:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-22 21:38:45,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 358 [2022-07-22 21:38:45,647 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) [2022-07-22 21:38:45,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:45,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 358 [2022-07-22 21:38:45,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:51,937 INFO L129 PetriNetUnfolder]: 4914/36468 cut-off events. [2022-07-22 21:38:51,937 INFO L130 PetriNetUnfolder]: For 53839/57184 co-relation queries the response was YES. [2022-07-22 21:38:52,535 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. [2022-07-22 21:38:52,831 INFO L132 encePairwiseOnDemand]: 345/358 looper letters, 166 selfloop transitions, 51 changer transitions 8/513 dead transitions. [2022-07-22 21:38:52,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 513 transitions, 3164 flow [2022-07-22 21:38:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:38:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:38:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3061 transitions. [2022-07-22 21:38:52,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772981208735399 [2022-07-22 21:38:52,836 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3061 transitions. [2022-07-22 21:38:52,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3061 transitions. [2022-07-22 21:38:52,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:52,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3061 transitions. [2022-07-22 21:38:52,840 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) [2022-07-22 21:38:52,843 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) [2022-07-22 21:38:52,844 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) [2022-07-22 21:38:52,844 INFO L186 Difference]: Start difference. First operand has 442 places, 430 transitions, 2090 flow. Second operand 11 states and 3061 transitions. [2022-07-22 21:38:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 513 transitions, 3164 flow [2022-07-22 21:38:52,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 513 transitions, 3049 flow, removed 41 selfloop flow, removed 7 redundant places. [2022-07-22 21:38:52,969 INFO L242 Difference]: Finished difference. Result has 448 places, 456 transitions, 2554 flow [2022-07-22 21:38:52,970 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} [2022-07-22 21:38:52,971 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 123 predicate places. [2022-07-22 21:38:52,971 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 456 transitions, 2554 flow [2022-07-22 21:38:52,972 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) [2022-07-22 21:38:52,972 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:52,972 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] [2022-07-22 21:38:52,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:53,172 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 [2022-07-22 21:38:53,173 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)] === [2022-07-22 21:38:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash -670238449, now seen corresponding path program 4 times [2022-07-22 21:38:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:53,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296587821] [2022-07-22 21:38:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:53,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296587821] [2022-07-22 21:38:53,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296587821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164078382] [2022-07-22 21:38:53,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:38:53,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:53,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:53,410 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) [2022-07-22 21:38:53,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:38:53,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:38:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:38:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:38:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:54,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:54,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164078382] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:54,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:54,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19, 18] total 36 [2022-07-22 21:38:54,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456953946] [2022-07-22 21:38:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:38:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:38:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 21:38:54,969 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-22 21:38:55,067 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) [2022-07-22 21:38:55,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:55,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-22 21:38:55,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:39:01,966 INFO L129 PetriNetUnfolder]: 4742/37746 cut-off events. [2022-07-22 21:39:01,966 INFO L130 PetriNetUnfolder]: For 66491/69757 co-relation queries the response was YES. [2022-07-22 21:39:02,568 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. [2022-07-22 21:39:02,927 INFO L132 encePairwiseOnDemand]: 328/358 looper letters, 275 selfloop transitions, 67 changer transitions 8/603 dead transitions. [2022-07-22 21:39:02,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 603 transitions, 4125 flow [2022-07-22 21:39:02,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:39:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:39:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7521 transitions. [2022-07-22 21:39:02,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7002793296089386 [2022-07-22 21:39:02,937 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7521 transitions. [2022-07-22 21:39:02,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7521 transitions. [2022-07-22 21:39:02,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:39:02,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7521 transitions. [2022-07-22 21:39:02,949 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) [2022-07-22 21:39:02,958 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) [2022-07-22 21:39:02,959 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) [2022-07-22 21:39:02,959 INFO L186 Difference]: Start difference. First operand has 448 places, 456 transitions, 2554 flow. Second operand 30 states and 7521 transitions. [2022-07-22 21:39:02,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 603 transitions, 4125 flow [2022-07-22 21:39:03,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 603 transitions, 3953 flow, removed 86 selfloop flow, removed 6 redundant places. [2022-07-22 21:39:03,140 INFO L242 Difference]: Finished difference. Result has 470 places, 467 transitions, 2840 flow [2022-07-22 21:39:03,141 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} [2022-07-22 21:39:03,142 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 145 predicate places. [2022-07-22 21:39:03,142 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 467 transitions, 2840 flow [2022-07-22 21:39:03,143 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) [2022-07-22 21:39:03,143 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:39:03,143 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] [2022-07-22 21:39:03,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:39:03,368 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 [2022-07-22 21:39:03,368 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)] === [2022-07-22 21:39:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:39:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash -546337380, now seen corresponding path program 1 times [2022-07-22 21:39:03,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:39:03,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695841029] [2022-07-22 21:39:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:39:03,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:39:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:39:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:39:03,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:39:03,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695841029] [2022-07-22 21:39:03,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695841029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:39:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739382095] [2022-07-22 21:39:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:39:03,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:39:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:39:03,551 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) [2022-07-22 21:39:03,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:39:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:39:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:39:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:39:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:39:04,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:39:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:39:04,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739382095] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:39:04,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:39:04,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-07-22 21:39:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282618199] [2022-07-22 21:39:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:39:04,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:39:04,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:39:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:39:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-07-22 21:39:04,285 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 358 [2022-07-22 21:39:04,287 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) [2022-07-22 21:39:04,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:39:04,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 358 [2022-07-22 21:39:04,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand