./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-word-symm.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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:02:38,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:02:38,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:02:38,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:02:38,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:02:38,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:02:38,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:02:38,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:02:38,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:02:38,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:02:38,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:02:38,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:02:38,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:02:38,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:02:38,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:02:38,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:02:38,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:02:38,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:02:38,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:02:38,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:02:38,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:02:38,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:02:38,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:02:38,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:02:38,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:02:38,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:02:38,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:02:38,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:02:38,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:02:38,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:02:38,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:02:38,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:02:38,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:02:38,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:02:38,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:02:38,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:02:38,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:02:38,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:02:38,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:02:38,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:02:38,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:02:38,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:02:38,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:02:38,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:02:38,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:02:38,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:02:38,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:02:38,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:02:38,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:02:38,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:02:38,477 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:02:38,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:02:38,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:02:38,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:02:38,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:02:38,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:02:38,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:02:38,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:02:38,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:02:38,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:02:38,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:02:38,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:02:38,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:02:38,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:02:38,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:02:38,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:02:38,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:02:38,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:02:38,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:02:38,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:02:38,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:02:38,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:02:38,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:02:38,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:02:38,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:02:38,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:02:38,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2021-12-16 03:02:38,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:02:38,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:02:38,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:02:38,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:02:38,689 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:02:38,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-12-16 03:02:38,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337da9bf7/246988e9e66a44dd8880d708645901ee/FLAGffef35f01 [2021-12-16 03:02:39,106 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:02:39,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-12-16 03:02:39,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337da9bf7/246988e9e66a44dd8880d708645901ee/FLAGffef35f01 [2021-12-16 03:02:39,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337da9bf7/246988e9e66a44dd8880d708645901ee [2021-12-16 03:02:39,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:02:39,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:02:39,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:02:39,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:02:39,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:02:39,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bb50f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39, skipping insertion in model container [2021-12-16 03:02:39,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:02:39,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:02:39,303 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-word-symm.wvr.c[2848,2861] [2021-12-16 03:02:39,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:02:39,322 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:02:39,357 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-word-symm.wvr.c[2848,2861] [2021-12-16 03:02:39,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:02:39,373 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:02:39,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39 WrapperNode [2021-12-16 03:02:39,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:02:39,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:02:39,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:02:39,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:02:39,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,416 INFO L137 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2021-12-16 03:02:39,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:02:39,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:02:39,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:02:39,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:02:39,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:02:39,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:02:39,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:02:39,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:02:39,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (1/1) ... [2021-12-16 03:02:39,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:02:39,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:39,482 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) [2021-12-16 03:02:39,486 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 [2021-12-16 03:02:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:02:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:02:39,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:02:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:02:39,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:02:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:02:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:02:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:02:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:02:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:02:39,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:02:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:02:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:02:39,509 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:02:39,568 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:02:39,569 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:02:39,804 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:02:39,811 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:02:39,811 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 03:02:39,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:02:39 BoogieIcfgContainer [2021-12-16 03:02:39,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:02:39,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:02:39,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:02:39,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:02:39,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:02:39" (1/3) ... [2021-12-16 03:02:39,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fabb85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:02:39, skipping insertion in model container [2021-12-16 03:02:39,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:39" (2/3) ... [2021-12-16 03:02:39,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fabb85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:02:39, skipping insertion in model container [2021-12-16 03:02:39,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:02:39" (3/3) ... [2021-12-16 03:02:39,818 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2021-12-16 03:02:39,821 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:02:39,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:02:39,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:02:39,821 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:02:39,844 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,844 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,845 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,846 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,846 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,846 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,846 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,846 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,846 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,846 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,847 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,847 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,847 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,847 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,847 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,847 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,848 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,848 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,848 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,848 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,848 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,848 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,848 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,851 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,857 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,857 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,858 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,858 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,861 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,861 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,862 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,865 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,868 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,868 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,868 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,869 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,872 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:39,876 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:02:39,912 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:02:39,916 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:02:39,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:02:39,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2021-12-16 03:02:39,980 INFO L129 PetriNetUnfolder]: 25/244 cut-off events. [2021-12-16 03:02:39,980 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:02:39,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 244 events. 25/244 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 312 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2021-12-16 03:02:39,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2021-12-16 03:02:39,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2021-12-16 03:02:40,034 INFO L129 PetriNetUnfolder]: 25/234 cut-off events. [2021-12-16 03:02:40,034 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:02:40,034 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:40,035 INFO L254 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] [2021-12-16 03:02:40,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:40,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1238378754, now seen corresponding path program 1 times [2021-12-16 03:02:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:40,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231170406] [2021-12-16 03:02:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:40,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:40,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:40,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231170406] [2021-12-16 03:02:40,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231170406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:40,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:40,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:02:40,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153211999] [2021-12-16 03:02:40,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:40,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:02:40,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:02:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:02:40,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2021-12-16 03:02:40,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:40,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2021-12-16 03:02:40,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:40,383 INFO L129 PetriNetUnfolder]: 14/224 cut-off events. [2021-12-16 03:02:40,383 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-16 03:02:40,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 224 events. 14/224 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 291 event pairs, 0 based on Foata normal form. 13/216 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2021-12-16 03:02:40,387 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2021-12-16 03:02:40,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2021-12-16 03:02:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:02:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:02:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2021-12-16 03:02:40,402 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2021-12-16 03:02:40,402 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2021-12-16 03:02:40,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2021-12-16 03:02:40,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:40,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2021-12-16 03:02:40,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,418 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,420 INFO L186 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2021-12-16 03:02:40,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2021-12-16 03:02:40,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:02:40,427 INFO L242 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2021-12-16 03:02:40,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=438, PETRI_PLACES=214, PETRI_TRANSITIONS=217} [2021-12-16 03:02:40,435 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2021-12-16 03:02:40,435 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2021-12-16 03:02:40,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,436 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:40,436 INFO L254 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] [2021-12-16 03:02:40,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:02:40,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1845329235, now seen corresponding path program 1 times [2021-12-16 03:02:40,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:40,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719285094] [2021-12-16 03:02:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:40,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:40,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:40,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719285094] [2021-12-16 03:02:40,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719285094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:40,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:40,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:02:40,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050898977] [2021-12-16 03:02:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:02:40,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:02:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:02:40,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-12-16 03:02:40,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 217 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:40,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-12-16 03:02:40,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:40,620 INFO L129 PetriNetUnfolder]: 26/304 cut-off events. [2021-12-16 03:02:40,620 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-16 03:02:40,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 304 events. 26/304 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 685 event pairs, 1 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 333. Up to 14 conditions per place. [2021-12-16 03:02:40,623 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2021-12-16 03:02:40,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2021-12-16 03:02:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:02:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 03:02:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2021-12-16 03:02:40,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2021-12-16 03:02:40,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2021-12-16 03:02:40,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2021-12-16 03:02:40,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:40,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2021-12-16 03:02:40,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,629 INFO L186 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2021-12-16 03:02:40,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2021-12-16 03:02:40,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:02:40,637 INFO L242 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2021-12-16 03:02:40,637 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2021-12-16 03:02:40,637 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2021-12-16 03:02:40,638 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2021-12-16 03:02:40,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,638 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:40,638 INFO L254 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] [2021-12-16 03:02:40,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:02:40,639 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -523798231, now seen corresponding path program 1 times [2021-12-16 03:02:40,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:40,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789829331] [2021-12-16 03:02:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:40,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:40,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789829331] [2021-12-16 03:02:40,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789829331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:40,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:40,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:02:40,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341270657] [2021-12-16 03:02:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:40,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:02:40,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:02:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:02:40,738 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-16 03:02:40,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:40,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-16 03:02:40,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:40,802 INFO L129 PetriNetUnfolder]: 53/486 cut-off events. [2021-12-16 03:02:40,803 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-12-16 03:02:40,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 486 events. 53/486 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1855 event pairs, 17 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 579. Up to 57 conditions per place. [2021-12-16 03:02:40,805 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2021-12-16 03:02:40,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 222 transitions, 501 flow [2021-12-16 03:02:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:02:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 03:02:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-12-16 03:02:40,811 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-12-16 03:02:40,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-12-16 03:02:40,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-12-16 03:02:40,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:40,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-12-16 03:02:40,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,816 INFO L186 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 677 transitions. [2021-12-16 03:02:40,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 222 transitions, 501 flow [2021-12-16 03:02:40,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 222 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 03:02:40,819 INFO L242 Difference]: Finished difference. Result has 212 places, 219 transitions, 462 flow [2021-12-16 03:02:40,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=212, PETRI_TRANSITIONS=219} [2021-12-16 03:02:40,821 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -5 predicate places. [2021-12-16 03:02:40,821 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 219 transitions, 462 flow [2021-12-16 03:02:40,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:40,822 INFO L254 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] [2021-12-16 03:02:40,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:02:40,822 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -837697581, now seen corresponding path program 2 times [2021-12-16 03:02:40,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711978131] [2021-12-16 03:02:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:40,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:40,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:40,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711978131] [2021-12-16 03:02:40,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711978131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:40,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:40,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:02:40,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831999098] [2021-12-16 03:02:40,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:40,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:02:40,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:02:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:02:40,883 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-16 03:02:40,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 219 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:40,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-16 03:02:40,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:40,940 INFO L129 PetriNetUnfolder]: 47/435 cut-off events. [2021-12-16 03:02:40,940 INFO L130 PetriNetUnfolder]: For 41/42 co-relation queries the response was YES. [2021-12-16 03:02:40,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 435 events. 47/435 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1417 event pairs, 14 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 521. Up to 45 conditions per place. [2021-12-16 03:02:40,948 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-12-16 03:02:40,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 224 transitions, 525 flow [2021-12-16 03:02:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:02:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 03:02:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-12-16 03:02:40,952 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-12-16 03:02:40,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-12-16 03:02:40,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-12-16 03:02:40,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:40,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-12-16 03:02:40,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,955 INFO L186 Difference]: Start difference. First operand has 212 places, 219 transitions, 462 flow. Second operand 3 states and 677 transitions. [2021-12-16 03:02:40,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 224 transitions, 525 flow [2021-12-16 03:02:40,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 224 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 03:02:40,959 INFO L242 Difference]: Finished difference. Result has 215 places, 221 transitions, 484 flow [2021-12-16 03:02:40,959 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=215, PETRI_TRANSITIONS=221} [2021-12-16 03:02:40,960 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -2 predicate places. [2021-12-16 03:02:40,960 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 221 transitions, 484 flow [2021-12-16 03:02:40,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:40,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:40,961 INFO L254 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] [2021-12-16 03:02:40,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:02:40,961 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash 345914545, now seen corresponding path program 1 times [2021-12-16 03:02:40,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579144459] [2021-12-16 03:02:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:40,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:41,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:41,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579144459] [2021-12-16 03:02:41,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579144459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:41,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:41,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:02:41,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137809829] [2021-12-16 03:02:41,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:41,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:02:41,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:02:41,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:02:41,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-12-16 03:02:41,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 221 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:41,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-12-16 03:02:41,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:41,062 INFO L129 PetriNetUnfolder]: 29/404 cut-off events. [2021-12-16 03:02:41,062 INFO L130 PetriNetUnfolder]: For 30/38 co-relation queries the response was YES. [2021-12-16 03:02:41,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 404 events. 29/404 cut-off events. For 30/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1292 event pairs, 2 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 467. Up to 26 conditions per place. [2021-12-16 03:02:41,064 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-12-16 03:02:41,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 224 transitions, 514 flow [2021-12-16 03:02:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:02:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 03:02:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2021-12-16 03:02:41,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2021-12-16 03:02:41,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2021-12-16 03:02:41,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2021-12-16 03:02:41,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:41,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2021-12-16 03:02:41,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,069 INFO L186 Difference]: Start difference. First operand has 215 places, 221 transitions, 484 flow. Second operand 3 states and 690 transitions. [2021-12-16 03:02:41,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 224 transitions, 514 flow [2021-12-16 03:02:41,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 224 transitions, 508 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-16 03:02:41,073 INFO L242 Difference]: Finished difference. Result has 217 places, 221 transitions, 486 flow [2021-12-16 03:02:41,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=486, PETRI_PLACES=217, PETRI_TRANSITIONS=221} [2021-12-16 03:02:41,074 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 0 predicate places. [2021-12-16 03:02:41,074 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 221 transitions, 486 flow [2021-12-16 03:02:41,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:41,074 INFO L254 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] [2021-12-16 03:02:41,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:02:41,075 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:41,075 INFO L85 PathProgramCache]: Analyzing trace with hash -118142017, now seen corresponding path program 1 times [2021-12-16 03:02:41,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:41,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258142886] [2021-12-16 03:02:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:41,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:41,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:41,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258142886] [2021-12-16 03:02:41,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258142886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:41,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:41,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:02:41,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527995973] [2021-12-16 03:02:41,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:41,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:02:41,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:02:41,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:02:41,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-16 03:02:41,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 221 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:41,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-16 03:02:41,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:41,181 INFO L129 PetriNetUnfolder]: 41/577 cut-off events. [2021-12-16 03:02:41,181 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-12-16 03:02:41,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 577 events. 41/577 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2376 event pairs, 8 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 697. Up to 23 conditions per place. [2021-12-16 03:02:41,183 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/231 dead transitions. [2021-12-16 03:02:41,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 231 transitions, 576 flow [2021-12-16 03:02:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:02:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-16 03:02:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-12-16 03:02:41,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-12-16 03:02:41,185 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-12-16 03:02:41,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-12-16 03:02:41,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:41,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-12-16 03:02:41,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,188 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,189 INFO L186 Difference]: Start difference. First operand has 217 places, 221 transitions, 486 flow. Second operand 4 states and 902 transitions. [2021-12-16 03:02:41,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 231 transitions, 576 flow [2021-12-16 03:02:41,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 231 transitions, 572 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 03:02:41,192 INFO L242 Difference]: Finished difference. Result has 220 places, 223 transitions, 508 flow [2021-12-16 03:02:41,192 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=508, PETRI_PLACES=220, PETRI_TRANSITIONS=223} [2021-12-16 03:02:41,193 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 3 predicate places. [2021-12-16 03:02:41,193 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 223 transitions, 508 flow [2021-12-16 03:02:41,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,193 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:41,193 INFO L254 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] [2021-12-16 03:02:41,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:02:41,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:41,194 INFO L85 PathProgramCache]: Analyzing trace with hash 577100317, now seen corresponding path program 2 times [2021-12-16 03:02:41,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:41,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944370444] [2021-12-16 03:02:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:41,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:41,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:41,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944370444] [2021-12-16 03:02:41,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944370444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:41,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:41,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:02:41,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696859] [2021-12-16 03:02:41,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:41,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:02:41,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:02:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:02:41,227 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-12-16 03:02:41,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 223 transitions, 508 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:41,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-12-16 03:02:41,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:41,292 INFO L129 PetriNetUnfolder]: 38/581 cut-off events. [2021-12-16 03:02:41,292 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2021-12-16 03:02:41,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 581 events. 38/581 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2401 event pairs, 8 based on Foata normal form. 3/557 useless extension candidates. Maximal degree in co-relation 713. Up to 23 conditions per place. [2021-12-16 03:02:41,295 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 28 selfloop transitions, 4 changer transitions 0/233 dead transitions. [2021-12-16 03:02:41,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 233 transitions, 606 flow [2021-12-16 03:02:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:02:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-16 03:02:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-12-16 03:02:41,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-12-16 03:02:41,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-12-16 03:02:41,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-12-16 03:02:41,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:41,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-12-16 03:02:41,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,300 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,300 INFO L186 Difference]: Start difference. First operand has 220 places, 223 transitions, 508 flow. Second operand 4 states and 902 transitions. [2021-12-16 03:02:41,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 233 transitions, 606 flow [2021-12-16 03:02:41,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 233 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 03:02:41,305 INFO L242 Difference]: Finished difference. Result has 224 places, 225 transitions, 536 flow [2021-12-16 03:02:41,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=536, PETRI_PLACES=224, PETRI_TRANSITIONS=225} [2021-12-16 03:02:41,305 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 7 predicate places. [2021-12-16 03:02:41,306 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 225 transitions, 536 flow [2021-12-16 03:02:41,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:41,306 INFO L254 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] [2021-12-16 03:02:41,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:02:41,306 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1246874527, now seen corresponding path program 1 times [2021-12-16 03:02:41,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:41,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284907049] [2021-12-16 03:02:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:41,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:41,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:41,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284907049] [2021-12-16 03:02:41,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284907049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:41,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:41,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:41,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370095139] [2021-12-16 03:02:41,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:41,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:41,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:41,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:41,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 225 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:41,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:41,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:41,682 INFO L129 PetriNetUnfolder]: 72/669 cut-off events. [2021-12-16 03:02:41,683 INFO L130 PetriNetUnfolder]: For 66/79 co-relation queries the response was YES. [2021-12-16 03:02:41,684 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 669 events. 72/669 cut-off events. For 66/79 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3275 event pairs, 27 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 988. Up to 185 conditions per place. [2021-12-16 03:02:41,686 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 3 changer transitions 22/271 dead transitions. [2021-12-16 03:02:41,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 271 transitions, 821 flow [2021-12-16 03:02:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:02:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-16 03:02:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2446 transitions. [2021-12-16 03:02:41,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7648530331457161 [2021-12-16 03:02:41,691 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2446 transitions. [2021-12-16 03:02:41,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2446 transitions. [2021-12-16 03:02:41,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:41,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2446 transitions. [2021-12-16 03:02:41,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,701 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,701 INFO L186 Difference]: Start difference. First operand has 224 places, 225 transitions, 536 flow. Second operand 13 states and 2446 transitions. [2021-12-16 03:02:41,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 271 transitions, 821 flow [2021-12-16 03:02:41,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 271 transitions, 815 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-16 03:02:41,710 INFO L242 Difference]: Finished difference. Result has 246 places, 227 transitions, 573 flow [2021-12-16 03:02:41,711 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=573, PETRI_PLACES=246, PETRI_TRANSITIONS=227} [2021-12-16 03:02:41,713 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-12-16 03:02:41,713 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 227 transitions, 573 flow [2021-12-16 03:02:41,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,714 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:41,714 INFO L254 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] [2021-12-16 03:02:41,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:02:41,714 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1587805225, now seen corresponding path program 1 times [2021-12-16 03:02:41,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:41,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253226557] [2021-12-16 03:02:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:41,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:41,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253226557] [2021-12-16 03:02:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253226557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:41,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:41,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:41,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389061368] [2021-12-16 03:02:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:41,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:41,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:41,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:41,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 227 transitions, 573 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:41,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:41,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:41,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:42,003 INFO L129 PetriNetUnfolder]: 73/661 cut-off events. [2021-12-16 03:02:42,003 INFO L130 PetriNetUnfolder]: For 223/242 co-relation queries the response was YES. [2021-12-16 03:02:42,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 661 events. 73/661 cut-off events. For 223/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3205 event pairs, 31 based on Foata normal form. 1/632 useless extension candidates. Maximal degree in co-relation 1150. Up to 211 conditions per place. [2021-12-16 03:02:42,006 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 8 changer transitions 12/252 dead transitions. [2021-12-16 03:02:42,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 252 transitions, 850 flow [2021-12-16 03:02:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:02:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 03:02:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2063 transitions. [2021-12-16 03:02:42,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7623798965262379 [2021-12-16 03:02:42,010 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2063 transitions. [2021-12-16 03:02:42,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2063 transitions. [2021-12-16 03:02:42,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:42,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2063 transitions. [2021-12-16 03:02:42,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.54545454545453) internal successors, (2063), 11 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,018 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,018 INFO L186 Difference]: Start difference. First operand has 246 places, 227 transitions, 573 flow. Second operand 11 states and 2063 transitions. [2021-12-16 03:02:42,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 252 transitions, 850 flow [2021-12-16 03:02:42,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 252 transitions, 809 flow, removed 20 selfloop flow, removed 7 redundant places. [2021-12-16 03:02:42,023 INFO L242 Difference]: Finished difference. Result has 249 places, 234 transitions, 637 flow [2021-12-16 03:02:42,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=637, PETRI_PLACES=249, PETRI_TRANSITIONS=234} [2021-12-16 03:02:42,024 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2021-12-16 03:02:42,024 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 234 transitions, 637 flow [2021-12-16 03:02:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,025 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:42,025 INFO L254 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] [2021-12-16 03:02:42,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:02:42,025 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash 358324959, now seen corresponding path program 2 times [2021-12-16 03:02:42,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:42,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660709100] [2021-12-16 03:02:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:42,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:42,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:42,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660709100] [2021-12-16 03:02:42,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660709100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:42,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:42,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:42,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564437446] [2021-12-16 03:02:42,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:42,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:42,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:42,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:42,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 234 transitions, 637 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:42,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:42,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:42,372 INFO L129 PetriNetUnfolder]: 71/667 cut-off events. [2021-12-16 03:02:42,373 INFO L130 PetriNetUnfolder]: For 302/325 co-relation queries the response was YES. [2021-12-16 03:02:42,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 667 events. 71/667 cut-off events. For 302/325 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3264 event pairs, 27 based on Foata normal form. 1/638 useless extension candidates. Maximal degree in co-relation 1221. Up to 183 conditions per place. [2021-12-16 03:02:42,376 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 17/274 dead transitions. [2021-12-16 03:02:42,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 274 transitions, 1039 flow [2021-12-16 03:02:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:02:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-16 03:02:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2440 transitions. [2021-12-16 03:02:42,381 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7629768605378362 [2021-12-16 03:02:42,381 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2440 transitions. [2021-12-16 03:02:42,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2440 transitions. [2021-12-16 03:02:42,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:42,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2440 transitions. [2021-12-16 03:02:42,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.69230769230768) internal successors, (2440), 13 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,391 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,391 INFO L186 Difference]: Start difference. First operand has 249 places, 234 transitions, 637 flow. Second operand 13 states and 2440 transitions. [2021-12-16 03:02:42,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 274 transitions, 1039 flow [2021-12-16 03:02:42,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 274 transitions, 963 flow, removed 38 selfloop flow, removed 5 redundant places. [2021-12-16 03:02:42,397 INFO L242 Difference]: Finished difference. Result has 261 places, 235 transitions, 660 flow [2021-12-16 03:02:42,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=660, PETRI_PLACES=261, PETRI_TRANSITIONS=235} [2021-12-16 03:02:42,399 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 44 predicate places. [2021-12-16 03:02:42,399 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 235 transitions, 660 flow [2021-12-16 03:02:42,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:42,400 INFO L254 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] [2021-12-16 03:02:42,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:02:42,400 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash -689111047, now seen corresponding path program 3 times [2021-12-16 03:02:42,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:42,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540367571] [2021-12-16 03:02:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:42,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:42,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:42,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540367571] [2021-12-16 03:02:42,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540367571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:42,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:42,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:42,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796900505] [2021-12-16 03:02:42,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:42,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:42,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:42,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:42,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:42,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 235 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:42,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:42,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:42,687 INFO L129 PetriNetUnfolder]: 70/671 cut-off events. [2021-12-16 03:02:42,688 INFO L130 PetriNetUnfolder]: For 410/433 co-relation queries the response was YES. [2021-12-16 03:02:42,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 671 events. 70/671 cut-off events. For 410/433 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3363 event pairs, 24 based on Foata normal form. 1/647 useless extension candidates. Maximal degree in co-relation 1266. Up to 182 conditions per place. [2021-12-16 03:02:42,691 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 18/275 dead transitions. [2021-12-16 03:02:42,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 275 transitions, 1078 flow [2021-12-16 03:02:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:02:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-16 03:02:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2442 transitions. [2021-12-16 03:02:42,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7636022514071295 [2021-12-16 03:02:42,695 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2442 transitions. [2021-12-16 03:02:42,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2442 transitions. [2021-12-16 03:02:42,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:42,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2442 transitions. [2021-12-16 03:02:42,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.84615384615384) internal successors, (2442), 13 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,704 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,704 INFO L186 Difference]: Start difference. First operand has 261 places, 235 transitions, 660 flow. Second operand 13 states and 2442 transitions. [2021-12-16 03:02:42,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 275 transitions, 1078 flow [2021-12-16 03:02:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 275 transitions, 1044 flow, removed 15 selfloop flow, removed 8 redundant places. [2021-12-16 03:02:42,710 INFO L242 Difference]: Finished difference. Result has 266 places, 235 transitions, 681 flow [2021-12-16 03:02:42,710 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=681, PETRI_PLACES=266, PETRI_TRANSITIONS=235} [2021-12-16 03:02:42,711 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-12-16 03:02:42,711 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 235 transitions, 681 flow [2021-12-16 03:02:42,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,711 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:42,712 INFO L254 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] [2021-12-16 03:02:42,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 03:02:42,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 408929291, now seen corresponding path program 4 times [2021-12-16 03:02:42,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:42,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864856323] [2021-12-16 03:02:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:42,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:42,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:42,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864856323] [2021-12-16 03:02:42,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864856323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:42,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:42,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:42,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155708745] [2021-12-16 03:02:42,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:42,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:42,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:42,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:42,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:42,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:42,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 235 transitions, 681 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:42,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:42,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:42,955 INFO L129 PetriNetUnfolder]: 65/673 cut-off events. [2021-12-16 03:02:42,956 INFO L130 PetriNetUnfolder]: For 582/606 co-relation queries the response was YES. [2021-12-16 03:02:42,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 673 events. 65/673 cut-off events. For 582/606 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3391 event pairs, 27 based on Foata normal form. 2/648 useless extension candidates. Maximal degree in co-relation 1306. Up to 216 conditions per place. [2021-12-16 03:02:42,960 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 10 changer transitions 11/255 dead transitions. [2021-12-16 03:02:42,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 255 transitions, 1023 flow [2021-12-16 03:02:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:02:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 03:02:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2061 transitions. [2021-12-16 03:02:42,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.761640798226164 [2021-12-16 03:02:42,964 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2061 transitions. [2021-12-16 03:02:42,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2061 transitions. [2021-12-16 03:02:42,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:42,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2061 transitions. [2021-12-16 03:02:42,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,972 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,972 INFO L186 Difference]: Start difference. First operand has 266 places, 235 transitions, 681 flow. Second operand 11 states and 2061 transitions. [2021-12-16 03:02:42,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 255 transitions, 1023 flow [2021-12-16 03:02:42,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 255 transitions, 938 flow, removed 29 selfloop flow, removed 11 redundant places. [2021-12-16 03:02:42,980 INFO L242 Difference]: Finished difference. Result has 265 places, 241 transitions, 757 flow [2021-12-16 03:02:42,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=757, PETRI_PLACES=265, PETRI_TRANSITIONS=241} [2021-12-16 03:02:42,980 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 48 predicate places. [2021-12-16 03:02:42,981 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 241 transitions, 757 flow [2021-12-16 03:02:42,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:42,981 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:42,981 INFO L254 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] [2021-12-16 03:02:42,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 03:02:42,982 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:42,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1378763287, now seen corresponding path program 5 times [2021-12-16 03:02:42,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:42,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095150568] [2021-12-16 03:02:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:42,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:43,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095150568] [2021-12-16 03:02:43,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095150568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:43,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:43,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:43,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759866600] [2021-12-16 03:02:43,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:43,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:43,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:43,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:43,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:43,077 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:43,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 241 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:43,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:43,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:43,207 INFO L129 PetriNetUnfolder]: 61/665 cut-off events. [2021-12-16 03:02:43,207 INFO L130 PetriNetUnfolder]: For 479/507 co-relation queries the response was YES. [2021-12-16 03:02:43,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 665 events. 61/665 cut-off events. For 479/507 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3331 event pairs, 25 based on Foata normal form. 4/643 useless extension candidates. Maximal degree in co-relation 1245. Up to 207 conditions per place. [2021-12-16 03:02:43,211 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 3 changer transitions 20/255 dead transitions. [2021-12-16 03:02:43,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 255 transitions, 1011 flow [2021-12-16 03:02:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:02:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:02:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2242 transitions. [2021-12-16 03:02:43,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7594850948509485 [2021-12-16 03:02:43,216 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2242 transitions. [2021-12-16 03:02:43,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2242 transitions. [2021-12-16 03:02:43,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:43,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2242 transitions. [2021-12-16 03:02:43,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.83333333333334) internal successors, (2242), 12 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,223 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,224 INFO L186 Difference]: Start difference. First operand has 265 places, 241 transitions, 757 flow. Second operand 12 states and 2242 transitions. [2021-12-16 03:02:43,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 255 transitions, 1011 flow [2021-12-16 03:02:43,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 255 transitions, 962 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-12-16 03:02:43,230 INFO L242 Difference]: Finished difference. Result has 272 places, 234 transitions, 673 flow [2021-12-16 03:02:43,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=272, PETRI_TRANSITIONS=234} [2021-12-16 03:02:43,230 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 55 predicate places. [2021-12-16 03:02:43,231 INFO L470 AbstractCegarLoop]: Abstraction has has 272 places, 234 transitions, 673 flow [2021-12-16 03:02:43,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:43,231 INFO L254 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] [2021-12-16 03:02:43,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 03:02:43,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash -42250989, now seen corresponding path program 6 times [2021-12-16 03:02:43,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:43,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543548791] [2021-12-16 03:02:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:43,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:43,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:43,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543548791] [2021-12-16 03:02:43,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543548791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:43,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:43,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:43,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326106249] [2021-12-16 03:02:43,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:43,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:43,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:43,321 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:43,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 234 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:43,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:43,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:43,470 INFO L129 PetriNetUnfolder]: 54/590 cut-off events. [2021-12-16 03:02:43,470 INFO L130 PetriNetUnfolder]: For 304/323 co-relation queries the response was YES. [2021-12-16 03:02:43,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 590 events. 54/590 cut-off events. For 304/323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2684 event pairs, 24 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1027. Up to 176 conditions per place. [2021-12-16 03:02:43,473 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 45 selfloop transitions, 2 changer transitions 21/244 dead transitions. [2021-12-16 03:02:43,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 244 transitions, 859 flow [2021-12-16 03:02:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:02:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:02:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2238 transitions. [2021-12-16 03:02:43,477 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.758130081300813 [2021-12-16 03:02:43,478 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2238 transitions. [2021-12-16 03:02:43,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2238 transitions. [2021-12-16 03:02:43,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:43,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2238 transitions. [2021-12-16 03:02:43,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.5) internal successors, (2238), 12 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,485 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,485 INFO L186 Difference]: Start difference. First operand has 272 places, 234 transitions, 673 flow. Second operand 12 states and 2238 transitions. [2021-12-16 03:02:43,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 244 transitions, 859 flow [2021-12-16 03:02:43,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 244 transitions, 789 flow, removed 19 selfloop flow, removed 18 redundant places. [2021-12-16 03:02:43,491 INFO L242 Difference]: Finished difference. Result has 257 places, 223 transitions, 561 flow [2021-12-16 03:02:43,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=561, PETRI_PLACES=257, PETRI_TRANSITIONS=223} [2021-12-16 03:02:43,492 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-12-16 03:02:43,492 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 223 transitions, 561 flow [2021-12-16 03:02:43,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:43,493 INFO L254 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] [2021-12-16 03:02:43,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 03:02:43,493 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1569864439, now seen corresponding path program 2 times [2021-12-16 03:02:43,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:43,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624074843] [2021-12-16 03:02:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:43,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:43,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624074843] [2021-12-16 03:02:43,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624074843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:43,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:43,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:43,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712447983] [2021-12-16 03:02:43,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:43,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:43,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:43,576 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:43,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 223 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:43,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:43,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:43,745 INFO L129 PetriNetUnfolder]: 57/598 cut-off events. [2021-12-16 03:02:43,745 INFO L130 PetriNetUnfolder]: For 161/174 co-relation queries the response was YES. [2021-12-16 03:02:43,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 598 events. 57/598 cut-off events. For 161/174 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2703 event pairs, 19 based on Foata normal form. 1/575 useless extension candidates. Maximal degree in co-relation 976. Up to 164 conditions per place. [2021-12-16 03:02:43,747 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 8 changer transitions 16/250 dead transitions. [2021-12-16 03:02:43,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 250 transitions, 816 flow [2021-12-16 03:02:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:02:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 03:02:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2066 transitions. [2021-12-16 03:02:43,750 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7634885439763488 [2021-12-16 03:02:43,750 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2066 transitions. [2021-12-16 03:02:43,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2066 transitions. [2021-12-16 03:02:43,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:43,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2066 transitions. [2021-12-16 03:02:43,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,756 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,756 INFO L186 Difference]: Start difference. First operand has 257 places, 223 transitions, 561 flow. Second operand 11 states and 2066 transitions. [2021-12-16 03:02:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 250 transitions, 816 flow [2021-12-16 03:02:43,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 250 transitions, 768 flow, removed 17 selfloop flow, removed 12 redundant places. [2021-12-16 03:02:43,761 INFO L242 Difference]: Finished difference. Result has 247 places, 229 transitions, 598 flow [2021-12-16 03:02:43,761 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=598, PETRI_PLACES=247, PETRI_TRANSITIONS=229} [2021-12-16 03:02:43,762 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-12-16 03:02:43,762 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 229 transitions, 598 flow [2021-12-16 03:02:43,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,762 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:43,762 INFO L254 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] [2021-12-16 03:02:43,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 03:02:43,762 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:43,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1125693919, now seen corresponding path program 3 times [2021-12-16 03:02:43,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:43,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222167806] [2021-12-16 03:02:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:43,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:43,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222167806] [2021-12-16 03:02:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222167806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:43,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:43,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:43,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918758102] [2021-12-16 03:02:43,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:43,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:43,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:43,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 229 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:43,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:43,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:43,976 INFO L129 PetriNetUnfolder]: 55/598 cut-off events. [2021-12-16 03:02:43,976 INFO L130 PetriNetUnfolder]: For 194/211 co-relation queries the response was YES. [2021-12-16 03:02:43,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 598 events. 55/598 cut-off events. For 194/211 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2735 event pairs, 15 based on Foata normal form. 1/575 useless extension candidates. Maximal degree in co-relation 1020. Up to 136 conditions per place. [2021-12-16 03:02:43,980 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 6 changer transitions 23/272 dead transitions. [2021-12-16 03:02:43,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 272 transitions, 978 flow [2021-12-16 03:02:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:02:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-16 03:02:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2443 transitions. [2021-12-16 03:02:43,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7639149468417761 [2021-12-16 03:02:43,983 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2443 transitions. [2021-12-16 03:02:43,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2443 transitions. [2021-12-16 03:02:43,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:43,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2443 transitions. [2021-12-16 03:02:43,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.92307692307693) internal successors, (2443), 13 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,989 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,989 INFO L186 Difference]: Start difference. First operand has 247 places, 229 transitions, 598 flow. Second operand 13 states and 2443 transitions. [2021-12-16 03:02:43,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 272 transitions, 978 flow [2021-12-16 03:02:43,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 272 transitions, 928 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-12-16 03:02:43,995 INFO L242 Difference]: Finished difference. Result has 257 places, 229 transitions, 614 flow [2021-12-16 03:02:43,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=614, PETRI_PLACES=257, PETRI_TRANSITIONS=229} [2021-12-16 03:02:43,995 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-12-16 03:02:43,995 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 229 transitions, 614 flow [2021-12-16 03:02:43,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:43,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:43,996 INFO L254 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] [2021-12-16 03:02:43,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 03:02:43,997 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1170519399, now seen corresponding path program 4 times [2021-12-16 03:02:43,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:43,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2306142] [2021-12-16 03:02:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:43,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:44,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:44,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2306142] [2021-12-16 03:02:44,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2306142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:44,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:44,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:44,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561612907] [2021-12-16 03:02:44,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:44,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:44,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:44,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:44,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:44,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 229 transitions, 614 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:44,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:44,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:44,242 INFO L129 PetriNetUnfolder]: 52/593 cut-off events. [2021-12-16 03:02:44,243 INFO L130 PetriNetUnfolder]: For 277/294 co-relation queries the response was YES. [2021-12-16 03:02:44,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 593 events. 52/593 cut-off events. For 277/294 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2728 event pairs, 13 based on Foata normal form. 1/572 useless extension candidates. Maximal degree in co-relation 1023. Up to 162 conditions per place. [2021-12-16 03:02:44,246 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 10 changer transitions 16/255 dead transitions. [2021-12-16 03:02:44,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 255 transitions, 933 flow [2021-12-16 03:02:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:02:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:02:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2245 transitions. [2021-12-16 03:02:44,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7605013550135501 [2021-12-16 03:02:44,249 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2245 transitions. [2021-12-16 03:02:44,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2245 transitions. [2021-12-16 03:02:44,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:44,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2245 transitions. [2021-12-16 03:02:44,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.08333333333334) internal successors, (2245), 12 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,255 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,255 INFO L186 Difference]: Start difference. First operand has 257 places, 229 transitions, 614 flow. Second operand 12 states and 2245 transitions. [2021-12-16 03:02:44,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 255 transitions, 933 flow [2021-12-16 03:02:44,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 255 transitions, 868 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-12-16 03:02:44,260 INFO L242 Difference]: Finished difference. Result has 256 places, 235 transitions, 676 flow [2021-12-16 03:02:44,261 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=676, PETRI_PLACES=256, PETRI_TRANSITIONS=235} [2021-12-16 03:02:44,261 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 39 predicate places. [2021-12-16 03:02:44,261 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 235 transitions, 676 flow [2021-12-16 03:02:44,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,262 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:44,262 INFO L254 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] [2021-12-16 03:02:44,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 03:02:44,262 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1860783933, now seen corresponding path program 5 times [2021-12-16 03:02:44,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:44,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992241673] [2021-12-16 03:02:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:44,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:44,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992241673] [2021-12-16 03:02:44,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992241673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:44,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:44,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:44,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677817389] [2021-12-16 03:02:44,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:44,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:44,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:44,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:44,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 235 transitions, 676 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:44,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:44,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:44,465 INFO L129 PetriNetUnfolder]: 47/590 cut-off events. [2021-12-16 03:02:44,465 INFO L130 PetriNetUnfolder]: For 264/284 co-relation queries the response was YES. [2021-12-16 03:02:44,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 590 events. 47/590 cut-off events. For 264/284 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2703 event pairs, 13 based on Foata normal form. 4/572 useless extension candidates. Maximal degree in co-relation 1009. Up to 162 conditions per place. [2021-12-16 03:02:44,484 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 3 changer transitions 22/251 dead transitions. [2021-12-16 03:02:44,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 251 transitions, 912 flow [2021-12-16 03:02:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:02:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 03:02:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2060 transitions. [2021-12-16 03:02:44,486 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7612712490761271 [2021-12-16 03:02:44,486 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2060 transitions. [2021-12-16 03:02:44,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2060 transitions. [2021-12-16 03:02:44,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:44,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2060 transitions. [2021-12-16 03:02:44,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.27272727272728) internal successors, (2060), 11 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,492 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,492 INFO L186 Difference]: Start difference. First operand has 256 places, 235 transitions, 676 flow. Second operand 11 states and 2060 transitions. [2021-12-16 03:02:44,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 251 transitions, 912 flow [2021-12-16 03:02:44,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 251 transitions, 892 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-12-16 03:02:44,497 INFO L242 Difference]: Finished difference. Result has 262 places, 228 transitions, 613 flow [2021-12-16 03:02:44,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=613, PETRI_PLACES=262, PETRI_TRANSITIONS=228} [2021-12-16 03:02:44,497 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 45 predicate places. [2021-12-16 03:02:44,497 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 228 transitions, 613 flow [2021-12-16 03:02:44,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:44,498 INFO L254 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] [2021-12-16 03:02:44,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 03:02:44,498 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash -541321939, now seen corresponding path program 6 times [2021-12-16 03:02:44,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377773731] [2021-12-16 03:02:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:44,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:44,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377773731] [2021-12-16 03:02:44,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377773731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:44,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:44,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:02:44,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679879354] [2021-12-16 03:02:44,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:44,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:02:44,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:02:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:02:44,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-12-16 03:02:44,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 228 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:44,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-12-16 03:02:44,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:44,711 INFO L129 PetriNetUnfolder]: 41/520 cut-off events. [2021-12-16 03:02:44,711 INFO L130 PetriNetUnfolder]: For 184/194 co-relation queries the response was YES. [2021-12-16 03:02:44,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 520 events. 41/520 cut-off events. For 184/194 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2089 event pairs, 12 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 830. Up to 129 conditions per place. [2021-12-16 03:02:44,714 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 38 selfloop transitions, 0 changer transitions 37/242 dead transitions. [2021-12-16 03:02:44,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 242 transitions, 809 flow [2021-12-16 03:02:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:02:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:02:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2239 transitions. [2021-12-16 03:02:44,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7584688346883469 [2021-12-16 03:02:44,717 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2239 transitions. [2021-12-16 03:02:44,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2239 transitions. [2021-12-16 03:02:44,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:44,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2239 transitions. [2021-12-16 03:02:44,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.58333333333334) internal successors, (2239), 12 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,723 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,723 INFO L186 Difference]: Start difference. First operand has 262 places, 228 transitions, 613 flow. Second operand 12 states and 2239 transitions. [2021-12-16 03:02:44,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 242 transitions, 809 flow [2021-12-16 03:02:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 242 transitions, 739 flow, removed 17 selfloop flow, removed 17 redundant places. [2021-12-16 03:02:44,727 INFO L242 Difference]: Finished difference. Result has 248 places, 205 transitions, 442 flow [2021-12-16 03:02:44,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=248, PETRI_TRANSITIONS=205} [2021-12-16 03:02:44,728 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2021-12-16 03:02:44,728 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 205 transitions, 442 flow [2021-12-16 03:02:44,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:44,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:44,729 INFO L254 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] [2021-12-16 03:02:44,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 03:02:44,729 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 46791359, now seen corresponding path program 1 times [2021-12-16 03:02:44,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:44,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349645285] [2021-12-16 03:02:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:44,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:45,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:45,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349645285] [2021-12-16 03:02:45,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349645285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:45,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:45,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-16 03:02:45,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137015416] [2021-12-16 03:02:45,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:45,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:02:45,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:02:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:02:45,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-16 03:02:45,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 205 transitions, 442 flow. Second operand has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:45,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:45,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-16 03:02:45,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:46,263 INFO L129 PetriNetUnfolder]: 197/1694 cut-off events. [2021-12-16 03:02:46,263 INFO L130 PetriNetUnfolder]: For 84/87 co-relation queries the response was YES. [2021-12-16 03:02:46,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1694 events. 197/1694 cut-off events. For 84/87 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12164 event pairs, 38 based on Foata normal form. 4/1573 useless extension candidates. Maximal degree in co-relation 2470. Up to 127 conditions per place. [2021-12-16 03:02:46,269 INFO L132 encePairwiseOnDemand]: 217/246 looper letters, 152 selfloop transitions, 37 changer transitions 13/341 dead transitions. [2021-12-16 03:02:46,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 341 transitions, 1158 flow [2021-12-16 03:02:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 03:02:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-16 03:02:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4655 transitions. [2021-12-16 03:02:46,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6758130081300813 [2021-12-16 03:02:46,273 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4655 transitions. [2021-12-16 03:02:46,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4655 transitions. [2021-12-16 03:02:46,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:46,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4655 transitions. [2021-12-16 03:02:46,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 166.25) internal successors, (4655), 28 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:46,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:46,284 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:46,284 INFO L186 Difference]: Start difference. First operand has 248 places, 205 transitions, 442 flow. Second operand 28 states and 4655 transitions. [2021-12-16 03:02:46,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 341 transitions, 1158 flow [2021-12-16 03:02:46,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 341 transitions, 1124 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-12-16 03:02:46,288 INFO L242 Difference]: Finished difference. Result has 251 places, 230 transitions, 641 flow [2021-12-16 03:02:46,289 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=641, PETRI_PLACES=251, PETRI_TRANSITIONS=230} [2021-12-16 03:02:46,289 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 34 predicate places. [2021-12-16 03:02:46,289 INFO L470 AbstractCegarLoop]: Abstraction has has 251 places, 230 transitions, 641 flow [2021-12-16 03:02:46,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:46,290 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:46,290 INFO L254 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] [2021-12-16 03:02:46,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 03:02:46,290 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1289123226, now seen corresponding path program 1 times [2021-12-16 03:02:46,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:46,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516423752] [2021-12-16 03:02:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:46,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:46,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:46,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516423752] [2021-12-16 03:02:46,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516423752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:46,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537058828] [2021-12-16 03:02:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:46,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:46,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:46,425 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) [2021-12-16 03:02:46,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:02:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:46,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 03:02:46,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:47,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:47,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537058828] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:47,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:02:47,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-12-16 03:02:47,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117891759] [2021-12-16 03:02:47,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:47,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:02:47,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:47,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:02:47,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-12-16 03:02:47,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-16 03:02:47,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 230 transitions, 641 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:47,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:47,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-16 03:02:47,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:48,090 INFO L129 PetriNetUnfolder]: 206/1858 cut-off events. [2021-12-16 03:02:48,090 INFO L130 PetriNetUnfolder]: For 659/667 co-relation queries the response was YES. [2021-12-16 03:02:48,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 1858 events. 206/1858 cut-off events. For 659/667 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 13896 event pairs, 81 based on Foata normal form. 6/1719 useless extension candidates. Maximal degree in co-relation 3076. Up to 224 conditions per place. [2021-12-16 03:02:48,101 INFO L132 encePairwiseOnDemand]: 226/246 looper letters, 145 selfloop transitions, 22 changer transitions 7/313 dead transitions. [2021-12-16 03:02:48,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 313 transitions, 1238 flow [2021-12-16 03:02:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 03:02:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-16 03:02:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3341 transitions. [2021-12-16 03:02:48,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6790650406504065 [2021-12-16 03:02:48,106 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3341 transitions. [2021-12-16 03:02:48,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3341 transitions. [2021-12-16 03:02:48,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:48,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3341 transitions. [2021-12-16 03:02:48,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 167.05) internal successors, (3341), 20 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,119 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,120 INFO L186 Difference]: Start difference. First operand has 251 places, 230 transitions, 641 flow. Second operand 20 states and 3341 transitions. [2021-12-16 03:02:48,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 313 transitions, 1238 flow [2021-12-16 03:02:48,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 313 transitions, 1206 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-12-16 03:02:48,126 INFO L242 Difference]: Finished difference. Result has 266 places, 236 transitions, 725 flow [2021-12-16 03:02:48,127 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=725, PETRI_PLACES=266, PETRI_TRANSITIONS=236} [2021-12-16 03:02:48,127 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-12-16 03:02:48,127 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 236 transitions, 725 flow [2021-12-16 03:02:48,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:48,128 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:48,128 INFO L254 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] [2021-12-16 03:02:48,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:48,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 03:02:48,344 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1113965941, now seen corresponding path program 1 times [2021-12-16 03:02:48,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:48,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444326577] [2021-12-16 03:02:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:48,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:48,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444326577] [2021-12-16 03:02:48,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444326577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596869793] [2021-12-16 03:02:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:48,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:48,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:48,494 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) [2021-12-16 03:02:48,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:02:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 03:02:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:49,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:49,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596869793] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:49,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:02:49,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-12-16 03:02:49,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406625090] [2021-12-16 03:02:49,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:49,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:02:49,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:49,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:02:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-12-16 03:02:49,504 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-12-16 03:02:49,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 236 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:49,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:49,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-12-16 03:02:49,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:50,057 INFO L129 PetriNetUnfolder]: 269/2431 cut-off events. [2021-12-16 03:02:50,058 INFO L130 PetriNetUnfolder]: For 1264/1282 co-relation queries the response was YES. [2021-12-16 03:02:50,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4217 conditions, 2431 events. 269/2431 cut-off events. For 1264/1282 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 20059 event pairs, 111 based on Foata normal form. 6/2242 useless extension candidates. Maximal degree in co-relation 4182. Up to 410 conditions per place. [2021-12-16 03:02:50,072 INFO L132 encePairwiseOnDemand]: 229/246 looper letters, 152 selfloop transitions, 23 changer transitions 11/325 dead transitions. [2021-12-16 03:02:50,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 325 transitions, 1399 flow [2021-12-16 03:02:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 03:02:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-16 03:02:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2021-12-16 03:02:50,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6836043360433605 [2021-12-16 03:02:50,075 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2021-12-16 03:02:50,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2021-12-16 03:02:50,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:50,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2021-12-16 03:02:50,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,082 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,082 INFO L186 Difference]: Start difference. First operand has 266 places, 236 transitions, 725 flow. Second operand 18 states and 3027 transitions. [2021-12-16 03:02:50,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 325 transitions, 1399 flow [2021-12-16 03:02:50,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 325 transitions, 1338 flow, removed 20 selfloop flow, removed 11 redundant places. [2021-12-16 03:02:50,090 INFO L242 Difference]: Finished difference. Result has 276 places, 240 transitions, 791 flow [2021-12-16 03:02:50,090 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=791, PETRI_PLACES=276, PETRI_TRANSITIONS=240} [2021-12-16 03:02:50,091 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-12-16 03:02:50,091 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 240 transitions, 791 flow [2021-12-16 03:02:50,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:50,091 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:50,092 INFO L254 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] [2021-12-16 03:02:50,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:50,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 03:02:50,312 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -447164831, now seen corresponding path program 2 times [2021-12-16 03:02:50,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:50,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216840596] [2021-12-16 03:02:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:50,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:50,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:50,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216840596] [2021-12-16 03:02:50,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216840596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:50,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031279322] [2021-12-16 03:02:50,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:02:50,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:50,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:50,477 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) [2021-12-16 03:02:50,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:02:50,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 03:02:50,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:02:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 03:02:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:51,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:02:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031279322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:51,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:02:51,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2021-12-16 03:02:51,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56916063] [2021-12-16 03:02:51,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:51,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 03:02:51,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 03:02:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-12-16 03:02:51,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 246 [2021-12-16 03:02:51,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 240 transitions, 791 flow. Second operand has 12 states, 12 states have (on average 180.66666666666666) internal successors, (2168), 12 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:51,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 246 [2021-12-16 03:02:51,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:51,652 INFO L129 PetriNetUnfolder]: 248/2642 cut-off events. [2021-12-16 03:02:51,652 INFO L130 PetriNetUnfolder]: For 1569/1615 co-relation queries the response was YES. [2021-12-16 03:02:51,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4677 conditions, 2642 events. 248/2642 cut-off events. For 1569/1615 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22466 event pairs, 101 based on Foata normal form. 22/2483 useless extension candidates. Maximal degree in co-relation 4637. Up to 495 conditions per place. [2021-12-16 03:02:51,665 INFO L132 encePairwiseOnDemand]: 233/246 looper letters, 83 selfloop transitions, 4 changer transitions 18/276 dead transitions. [2021-12-16 03:02:51,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 276 transitions, 1135 flow [2021-12-16 03:02:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:02:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:02:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2558 transitions. [2021-12-16 03:02:51,667 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2021-12-16 03:02:51,667 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2558 transitions. [2021-12-16 03:02:51,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2558 transitions. [2021-12-16 03:02:51,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:51,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2558 transitions. [2021-12-16 03:02:51,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 182.71428571428572) internal successors, (2558), 14 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,672 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,672 INFO L186 Difference]: Start difference. First operand has 276 places, 240 transitions, 791 flow. Second operand 14 states and 2558 transitions. [2021-12-16 03:02:51,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 276 transitions, 1135 flow [2021-12-16 03:02:51,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 276 transitions, 1082 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-12-16 03:02:51,681 INFO L242 Difference]: Finished difference. Result has 288 places, 240 transitions, 796 flow [2021-12-16 03:02:51,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=796, PETRI_PLACES=288, PETRI_TRANSITIONS=240} [2021-12-16 03:02:51,681 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 71 predicate places. [2021-12-16 03:02:51,681 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 240 transitions, 796 flow [2021-12-16 03:02:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.66666666666666) internal successors, (2168), 12 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:51,682 INFO L254 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] [2021-12-16 03:02:51,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:51,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:51,899 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1463331462, now seen corresponding path program 1 times [2021-12-16 03:02:51,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:51,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713897599] [2021-12-16 03:02:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:51,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:51,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713897599] [2021-12-16 03:02:51,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713897599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:51,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:51,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:02:51,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861496601] [2021-12-16 03:02:51,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:51,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:02:51,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:02:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:02:51,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-16 03:02:51,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 240 transitions, 796 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:51,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:51,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-16 03:02:51,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:52,202 INFO L129 PetriNetUnfolder]: 211/1604 cut-off events. [2021-12-16 03:02:52,202 INFO L130 PetriNetUnfolder]: For 2071/2107 co-relation queries the response was YES. [2021-12-16 03:02:52,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 1604 events. 211/1604 cut-off events. For 2071/2107 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 11218 event pairs, 116 based on Foata normal form. 2/1467 useless extension candidates. Maximal degree in co-relation 2977. Up to 321 conditions per place. [2021-12-16 03:02:52,212 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 73 selfloop transitions, 12 changer transitions 4/257 dead transitions. [2021-12-16 03:02:52,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 257 transitions, 1045 flow [2021-12-16 03:02:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:02:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-16 03:02:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1985 transitions. [2021-12-16 03:02:52,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2021-12-16 03:02:52,218 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1985 transitions. [2021-12-16 03:02:52,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1985 transitions. [2021-12-16 03:02:52,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:52,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1985 transitions. [2021-12-16 03:02:52,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,226 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,226 INFO L186 Difference]: Start difference. First operand has 288 places, 240 transitions, 796 flow. Second operand 10 states and 1985 transitions. [2021-12-16 03:02:52,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 257 transitions, 1045 flow [2021-12-16 03:02:52,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 257 transitions, 1011 flow, removed 13 selfloop flow, removed 13 redundant places. [2021-12-16 03:02:52,235 INFO L242 Difference]: Finished difference. Result has 274 places, 236 transitions, 774 flow [2021-12-16 03:02:52,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=774, PETRI_PLACES=274, PETRI_TRANSITIONS=236} [2021-12-16 03:02:52,236 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 57 predicate places. [2021-12-16 03:02:52,236 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 236 transitions, 774 flow [2021-12-16 03:02:52,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:52,236 INFO L254 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] [2021-12-16 03:02:52,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 03:02:52,237 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:52,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1027993710, now seen corresponding path program 1 times [2021-12-16 03:02:52,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:52,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877988507] [2021-12-16 03:02:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:52,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:52,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:52,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877988507] [2021-12-16 03:02:52,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877988507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:52,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:52,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:02:52,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806703074] [2021-12-16 03:02:52,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:52,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:02:52,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:02:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:02:52,282 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-16 03:02:52,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 236 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:52,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-16 03:02:52,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:52,479 INFO L129 PetriNetUnfolder]: 272/1644 cut-off events. [2021-12-16 03:02:52,479 INFO L130 PetriNetUnfolder]: For 1479/1503 co-relation queries the response was YES. [2021-12-16 03:02:52,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 1644 events. 272/1644 cut-off events. For 1479/1503 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 10966 event pairs, 139 based on Foata normal form. 8/1515 useless extension candidates. Maximal degree in co-relation 2924. Up to 430 conditions per place. [2021-12-16 03:02:52,486 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 45 selfloop transitions, 8 changer transitions 34/251 dead transitions. [2021-12-16 03:02:52,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 251 transitions, 993 flow [2021-12-16 03:02:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:02:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-16 03:02:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1983 transitions. [2021-12-16 03:02:52,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8060975609756098 [2021-12-16 03:02:52,493 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1983 transitions. [2021-12-16 03:02:52,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1983 transitions. [2021-12-16 03:02:52,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:52,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1983 transitions. [2021-12-16 03:02:52,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,496 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,496 INFO L186 Difference]: Start difference. First operand has 274 places, 236 transitions, 774 flow. Second operand 10 states and 1983 transitions. [2021-12-16 03:02:52,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 251 transitions, 993 flow [2021-12-16 03:02:52,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 251 transitions, 968 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-12-16 03:02:52,502 INFO L242 Difference]: Finished difference. Result has 276 places, 215 transitions, 628 flow [2021-12-16 03:02:52,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=628, PETRI_PLACES=276, PETRI_TRANSITIONS=215} [2021-12-16 03:02:52,503 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-12-16 03:02:52,503 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 215 transitions, 628 flow [2021-12-16 03:02:52,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:52,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:52,503 INFO L254 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] [2021-12-16 03:02:52,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 03:02:52,504 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1921923888, now seen corresponding path program 1 times [2021-12-16 03:02:52,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:52,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604978287] [2021-12-16 03:02:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:52,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:52,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:52,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604978287] [2021-12-16 03:02:52,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604978287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:52,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459731412] [2021-12-16 03:02:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:52,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:52,611 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) [2021-12-16 03:02:52,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:02:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 03:02:52,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:53,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:53,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459731412] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:53,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:02:53,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-12-16 03:02:53,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64140789] [2021-12-16 03:02:53,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:53,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:02:53,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:02:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-12-16 03:02:53,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-12-16 03:02:53,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 215 transitions, 628 flow. Second operand has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:53,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:53,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-12-16 03:02:53,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:53,878 INFO L129 PetriNetUnfolder]: 251/1472 cut-off events. [2021-12-16 03:02:53,878 INFO L130 PetriNetUnfolder]: For 1093/1104 co-relation queries the response was YES. [2021-12-16 03:02:53,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1472 events. 251/1472 cut-off events. For 1093/1104 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9650 event pairs, 51 based on Foata normal form. 9/1375 useless extension candidates. Maximal degree in co-relation 2553. Up to 147 conditions per place. [2021-12-16 03:02:53,886 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 70 selfloop transitions, 15 changer transitions 0/247 dead transitions. [2021-12-16 03:02:53,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 247 transitions, 949 flow [2021-12-16 03:02:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:02:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-16 03:02:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2725 transitions. [2021-12-16 03:02:53,889 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7912311265969802 [2021-12-16 03:02:53,889 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2725 transitions. [2021-12-16 03:02:53,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2725 transitions. [2021-12-16 03:02:53,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:53,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2725 transitions. [2021-12-16 03:02:53,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.64285714285714) internal successors, (2725), 14 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:53,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:53,893 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:53,893 INFO L186 Difference]: Start difference. First operand has 276 places, 215 transitions, 628 flow. Second operand 14 states and 2725 transitions. [2021-12-16 03:02:53,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 247 transitions, 949 flow [2021-12-16 03:02:53,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 247 transitions, 839 flow, removed 30 selfloop flow, removed 25 redundant places. [2021-12-16 03:02:53,899 INFO L242 Difference]: Finished difference. Result has 246 places, 219 transitions, 599 flow [2021-12-16 03:02:53,899 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=599, PETRI_PLACES=246, PETRI_TRANSITIONS=219} [2021-12-16 03:02:53,899 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-12-16 03:02:53,900 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 219 transitions, 599 flow [2021-12-16 03:02:53,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:53,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:53,900 INFO L254 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] [2021-12-16 03:02:53,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:54,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 03:02:54,117 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:54,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:54,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1696586148, now seen corresponding path program 1 times [2021-12-16 03:02:54,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:54,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945893921] [2021-12-16 03:02:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:54,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:54,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945893921] [2021-12-16 03:02:54,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945893921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:54,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:54,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:02:54,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045111111] [2021-12-16 03:02:54,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:54,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:02:54,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:54,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:02:54,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:02:54,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-16 03:02:54,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 219 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:54,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-16 03:02:54,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:54,290 INFO L129 PetriNetUnfolder]: 118/871 cut-off events. [2021-12-16 03:02:54,290 INFO L130 PetriNetUnfolder]: For 413/449 co-relation queries the response was YES. [2021-12-16 03:02:54,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 871 events. 118/871 cut-off events. For 413/449 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4438 event pairs, 66 based on Foata normal form. 22/823 useless extension candidates. Maximal degree in co-relation 1476. Up to 174 conditions per place. [2021-12-16 03:02:54,295 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 59 selfloop transitions, 8 changer transitions 3/236 dead transitions. [2021-12-16 03:02:54,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 236 transitions, 810 flow [2021-12-16 03:02:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:02:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:02:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1591 transitions. [2021-12-16 03:02:54,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8084349593495935 [2021-12-16 03:02:54,313 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1591 transitions. [2021-12-16 03:02:54,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1591 transitions. [2021-12-16 03:02:54,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:54,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1591 transitions. [2021-12-16 03:02:54,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,318 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,318 INFO L186 Difference]: Start difference. First operand has 246 places, 219 transitions, 599 flow. Second operand 8 states and 1591 transitions. [2021-12-16 03:02:54,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 236 transitions, 810 flow [2021-12-16 03:02:54,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 236 transitions, 788 flow, removed 1 selfloop flow, removed 9 redundant places. [2021-12-16 03:02:54,322 INFO L242 Difference]: Finished difference. Result has 247 places, 221 transitions, 613 flow [2021-12-16 03:02:54,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=247, PETRI_TRANSITIONS=221} [2021-12-16 03:02:54,323 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-12-16 03:02:54,323 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 221 transitions, 613 flow [2021-12-16 03:02:54,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:54,323 INFO L254 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] [2021-12-16 03:02:54,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 03:02:54,323 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1201599220, now seen corresponding path program 1 times [2021-12-16 03:02:54,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:54,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115864845] [2021-12-16 03:02:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:54,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:54,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:54,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115864845] [2021-12-16 03:02:54,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115864845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:54,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:54,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:02:54,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376342634] [2021-12-16 03:02:54,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:54,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:02:54,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:02:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:02:54,379 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-12-16 03:02:54,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 221 transitions, 613 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:54,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-12-16 03:02:54,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:54,504 INFO L129 PetriNetUnfolder]: 137/851 cut-off events. [2021-12-16 03:02:54,504 INFO L130 PetriNetUnfolder]: For 413/417 co-relation queries the response was YES. [2021-12-16 03:02:54,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 851 events. 137/851 cut-off events. For 413/417 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4098 event pairs, 66 based on Foata normal form. 9/806 useless extension candidates. Maximal degree in co-relation 1483. Up to 225 conditions per place. [2021-12-16 03:02:54,508 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 46 selfloop transitions, 6 changer transitions 13/229 dead transitions. [2021-12-16 03:02:54,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 229 transitions, 763 flow [2021-12-16 03:02:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:02:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:02:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1588 transitions. [2021-12-16 03:02:54,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2021-12-16 03:02:54,510 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1588 transitions. [2021-12-16 03:02:54,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1588 transitions. [2021-12-16 03:02:54,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:54,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1588 transitions. [2021-12-16 03:02:54,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.5) internal successors, (1588), 8 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,513 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,513 INFO L186 Difference]: Start difference. First operand has 247 places, 221 transitions, 613 flow. Second operand 8 states and 1588 transitions. [2021-12-16 03:02:54,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 229 transitions, 763 flow [2021-12-16 03:02:54,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 229 transitions, 748 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-16 03:02:54,517 INFO L242 Difference]: Finished difference. Result has 248 places, 214 transitions, 563 flow [2021-12-16 03:02:54,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=563, PETRI_PLACES=248, PETRI_TRANSITIONS=214} [2021-12-16 03:02:54,518 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2021-12-16 03:02:54,518 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 214 transitions, 563 flow [2021-12-16 03:02:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:54,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:54,519 INFO L254 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] [2021-12-16 03:02:54,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-16 03:02:54,519 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash 506138029, now seen corresponding path program 1 times [2021-12-16 03:02:54,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:54,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638512446] [2021-12-16 03:02:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:54,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:54,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:54,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638512446] [2021-12-16 03:02:54,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638512446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:54,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400275522] [2021-12-16 03:02:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:54,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:54,631 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) [2021-12-16 03:02:54,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:02:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 03:02:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:55,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:55,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400275522] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:55,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:02:55,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-12-16 03:02:55,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714849983] [2021-12-16 03:02:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:55,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:02:55,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:02:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-12-16 03:02:55,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-12-16 03:02:55,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 214 transitions, 563 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:55,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-12-16 03:02:55,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:55,754 INFO L129 PetriNetUnfolder]: 103/789 cut-off events. [2021-12-16 03:02:55,754 INFO L130 PetriNetUnfolder]: For 353/374 co-relation queries the response was YES. [2021-12-16 03:02:55,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 789 events. 103/789 cut-off events. For 353/374 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3919 event pairs, 44 based on Foata normal form. 23/760 useless extension candidates. Maximal degree in co-relation 1318. Up to 115 conditions per place. [2021-12-16 03:02:55,758 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 49 selfloop transitions, 13 changer transitions 0/224 dead transitions. [2021-12-16 03:02:55,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 224 transitions, 737 flow [2021-12-16 03:02:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:02:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-16 03:02:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2513 transitions. [2021-12-16 03:02:55,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7858036272670419 [2021-12-16 03:02:55,760 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2513 transitions. [2021-12-16 03:02:55,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2513 transitions. [2021-12-16 03:02:55,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:55,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2513 transitions. [2021-12-16 03:02:55,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.30769230769232) internal successors, (2513), 13 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,764 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,764 INFO L186 Difference]: Start difference. First operand has 248 places, 214 transitions, 563 flow. Second operand 13 states and 2513 transitions. [2021-12-16 03:02:55,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 224 transitions, 737 flow [2021-12-16 03:02:55,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 224 transitions, 704 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-12-16 03:02:55,768 INFO L242 Difference]: Finished difference. Result has 246 places, 215 transitions, 576 flow [2021-12-16 03:02:55,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=576, PETRI_PLACES=246, PETRI_TRANSITIONS=215} [2021-12-16 03:02:55,769 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-12-16 03:02:55,769 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 215 transitions, 576 flow [2021-12-16 03:02:55,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:55,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:55,769 INFO L254 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] [2021-12-16 03:02:55,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:02:55,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 03:02:55,987 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1333987860, now seen corresponding path program 1 times [2021-12-16 03:02:55,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:55,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271925011] [2021-12-16 03:02:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:55,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:02:56,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:56,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271925011] [2021-12-16 03:02:56,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271925011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:56,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350728258] [2021-12-16 03:02:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:56,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:56,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:56,337 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) [2021-12-16 03:02:56,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:02:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 03:02:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:02:57,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:02:58,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350728258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:02:58,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:02:58,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2021-12-16 03:02:58,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107945580] [2021-12-16 03:02:58,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:02:58,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 03:02:58,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 03:02:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 03:02:58,497 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2021-12-16 03:02:58,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 215 transitions, 576 flow. Second operand has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:02:58,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:58,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2021-12-16 03:02:58,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:00,302 INFO L129 PetriNetUnfolder]: 421/2591 cut-off events. [2021-12-16 03:03:00,302 INFO L130 PetriNetUnfolder]: For 1107/1224 co-relation queries the response was YES. [2021-12-16 03:03:00,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4884 conditions, 2591 events. 421/2591 cut-off events. For 1107/1224 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 21363 event pairs, 226 based on Foata normal form. 116/2520 useless extension candidates. Maximal degree in co-relation 4858. Up to 284 conditions per place. [2021-12-16 03:03:00,313 INFO L132 encePairwiseOnDemand]: 222/246 looper letters, 225 selfloop transitions, 38 changer transitions 30/423 dead transitions. [2021-12-16 03:03:00,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 423 transitions, 1811 flow [2021-12-16 03:03:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-16 03:03:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-16 03:03:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5670 transitions. [2021-12-16 03:03:00,317 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2021-12-16 03:03:00,317 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5670 transitions. [2021-12-16 03:03:00,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5670 transitions. [2021-12-16 03:03:00,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:00,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5670 transitions. [2021-12-16 03:03:00,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 157.5) internal successors, (5670), 36 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:00,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:00,327 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:00,327 INFO L186 Difference]: Start difference. First operand has 246 places, 215 transitions, 576 flow. Second operand 36 states and 5670 transitions. [2021-12-16 03:03:00,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 423 transitions, 1811 flow [2021-12-16 03:03:00,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 423 transitions, 1771 flow, removed 0 selfloop flow, removed 11 redundant places. [2021-12-16 03:03:00,333 INFO L242 Difference]: Finished difference. Result has 286 places, 239 transitions, 805 flow [2021-12-16 03:03:00,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=805, PETRI_PLACES=286, PETRI_TRANSITIONS=239} [2021-12-16 03:03:00,334 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 69 predicate places. [2021-12-16 03:03:00,334 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 239 transitions, 805 flow [2021-12-16 03:03:00,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:00,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:00,335 INFO L254 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, 1] [2021-12-16 03:03:00,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 03:03:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:00,555 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:03:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash 442798214, now seen corresponding path program 1 times [2021-12-16 03:03:00,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428833838] [2021-12-16 03:03:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:00,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:03:00,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428833838] [2021-12-16 03:03:00,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428833838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666155498] [2021-12-16 03:03:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:00,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:00,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:00,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:03:00,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:03:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-16 03:03:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:01,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 03:03:01,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-16 03:03:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:03:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:01,692 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-12-16 03:03:01,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2021-12-16 03:03:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:03:01,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666155498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:01,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:01,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 29 [2021-12-16 03:03:01,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53531354] [2021-12-16 03:03:01,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:01,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 03:03:01,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:01,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 03:03:01,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-12-16 03:03:01,828 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2021-12-16 03:03:01,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 239 transitions, 805 flow. Second operand has 29 states, 29 states have (on average 174.31034482758622) internal successors, (5055), 29 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:01,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:01,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2021-12-16 03:03:01,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:05,510 INFO L129 PetriNetUnfolder]: 9406/24737 cut-off events. [2021-12-16 03:03:05,511 INFO L130 PetriNetUnfolder]: For 8471/8552 co-relation queries the response was YES. [2021-12-16 03:03:05,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48767 conditions, 24737 events. 9406/24737 cut-off events. For 8471/8552 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 276819 event pairs, 2123 based on Foata normal form. 2/23396 useless extension candidates. Maximal degree in co-relation 48725. Up to 4318 conditions per place. [2021-12-16 03:03:05,706 INFO L132 encePairwiseOnDemand]: 215/246 looper letters, 304 selfloop transitions, 93 changer transitions 0/568 dead transitions. [2021-12-16 03:03:05,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 568 transitions, 2484 flow [2021-12-16 03:03:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 03:03:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-16 03:03:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6370 transitions. [2021-12-16 03:03:05,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7398373983739838 [2021-12-16 03:03:05,712 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6370 transitions. [2021-12-16 03:03:05,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6370 transitions. [2021-12-16 03:03:05,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:05,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6370 transitions. [2021-12-16 03:03:05,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 182.0) internal successors, (6370), 35 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:05,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 246.0) internal successors, (8856), 36 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:05,728 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 246.0) internal successors, (8856), 36 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:05,729 INFO L186 Difference]: Start difference. First operand has 286 places, 239 transitions, 805 flow. Second operand 35 states and 6370 transitions. [2021-12-16 03:03:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 568 transitions, 2484 flow [2021-12-16 03:03:05,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 568 transitions, 2445 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-16 03:03:05,763 INFO L242 Difference]: Finished difference. Result has 328 places, 313 transitions, 1458 flow [2021-12-16 03:03:05,763 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1458, PETRI_PLACES=328, PETRI_TRANSITIONS=313} [2021-12-16 03:03:05,763 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 111 predicate places. [2021-12-16 03:03:05,764 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 313 transitions, 1458 flow [2021-12-16 03:03:05,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 174.31034482758622) internal successors, (5055), 29 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:05,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:05,764 INFO L254 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, 1] [2021-12-16 03:03:05,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-16 03:03:05,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:05,983 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:03:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:05,983 INFO L85 PathProgramCache]: Analyzing trace with hash 687785676, now seen corresponding path program 2 times [2021-12-16 03:03:05,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:05,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249845997] [2021-12-16 03:03:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:05,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:03:06,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249845997] [2021-12-16 03:03:06,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249845997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317583465] [2021-12-16 03:03:06,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:03:06,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:06,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:06,324 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:03:06,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:03:06,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:03:06,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:03:06,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-16 03:03:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:06,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:06,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 03:03:06,851 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 03:03:06,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 03:03:06,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:07,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:07,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:07,573 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-16 03:03:07,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 23 [2021-12-16 03:03:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:07,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:03:08,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317583465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:08,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:08,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 12] total 55 [2021-12-16 03:03:08,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664463628] [2021-12-16 03:03:08,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:08,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-16 03:03:08,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-16 03:03:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2731, Unknown=0, NotChecked=0, Total=2970 [2021-12-16 03:03:08,206 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 246 [2021-12-16 03:03:08,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 313 transitions, 1458 flow. Second operand has 55 states, 55 states have (on average 150.27272727272728) internal successors, (8265), 55 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:08,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:08,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 246 [2021-12-16 03:03:08,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:18,834 INFO L129 PetriNetUnfolder]: 18611/47105 cut-off events. [2021-12-16 03:03:18,834 INFO L130 PetriNetUnfolder]: For 62325/62510 co-relation queries the response was YES. [2021-12-16 03:03:19,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122129 conditions, 47105 events. 18611/47105 cut-off events. For 62325/62510 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 561695 event pairs, 760 based on Foata normal form. 148/45949 useless extension candidates. Maximal degree in co-relation 122068. Up to 12600 conditions per place. [2021-12-16 03:03:19,363 INFO L132 encePairwiseOnDemand]: 204/246 looper letters, 440 selfloop transitions, 191 changer transitions 0/764 dead transitions. [2021-12-16 03:03:19,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 764 transitions, 5219 flow [2021-12-16 03:03:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-16 03:03:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-16 03:03:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 7927 transitions. [2021-12-16 03:03:19,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6318348477602423 [2021-12-16 03:03:19,370 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 7927 transitions. [2021-12-16 03:03:19,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 7927 transitions. [2021-12-16 03:03:19,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:19,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 7927 transitions. [2021-12-16 03:03:19,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 155.4313725490196) internal successors, (7927), 51 states have internal predecessors, (7927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:19,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 246.0) internal successors, (12792), 52 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:19,390 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 246.0) internal successors, (12792), 52 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:19,391 INFO L186 Difference]: Start difference. First operand has 328 places, 313 transitions, 1458 flow. Second operand 51 states and 7927 transitions. [2021-12-16 03:03:19,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 764 transitions, 5219 flow [2021-12-16 03:03:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 764 transitions, 5192 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-16 03:03:20,269 INFO L242 Difference]: Finished difference. Result has 399 places, 451 transitions, 3300 flow [2021-12-16 03:03:20,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3300, PETRI_PLACES=399, PETRI_TRANSITIONS=451} [2021-12-16 03:03:20,270 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 182 predicate places. [2021-12-16 03:03:20,270 INFO L470 AbstractCegarLoop]: Abstraction has has 399 places, 451 transitions, 3300 flow [2021-12-16 03:03:20,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 150.27272727272728) internal successors, (8265), 55 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:20,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:20,272 INFO L254 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, 1] [2021-12-16 03:03:20,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:03:20,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-16 03:03:20,486 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:03:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash 792877422, now seen corresponding path program 1 times [2021-12-16 03:03:20,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328035915] [2021-12-16 03:03:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:20,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:03:20,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:20,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328035915] [2021-12-16 03:03:20,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328035915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:20,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880836130] [2021-12-16 03:03:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:20,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:20,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:20,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:03:20,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:03:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:20,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 03:03:20,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:20,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:21,038 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 03:03:21,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 03:03:21,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 03:03:21,389 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-16 03:03:21,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 03:03:21,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:21,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:21,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:03:21,910 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 03:03:21,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-16 03:03:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:21,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:03:22,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880836130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:22,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:22,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 9] total 49 [2021-12-16 03:03:22,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953796961] [2021-12-16 03:03:22,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:22,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-16 03:03:22,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-16 03:03:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2162, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 03:03:22,307 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 246 [2021-12-16 03:03:22,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 451 transitions, 3300 flow. Second operand has 49 states, 49 states have (on average 154.44897959183675) internal successors, (7568), 49 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:22,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:22,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 246 [2021-12-16 03:03:22,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:36,838 INFO L129 PetriNetUnfolder]: 24152/60218 cut-off events. [2021-12-16 03:03:36,838 INFO L130 PetriNetUnfolder]: For 260007/261284 co-relation queries the response was YES. [2021-12-16 03:03:38,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203821 conditions, 60218 events. 24152/60218 cut-off events. For 260007/261284 co-relation queries the response was YES. Maximal size of possible extension queue 2052. Compared 738349 event pairs, 7057 based on Foata normal form. 381/59679 useless extension candidates. Maximal degree in co-relation 203731. Up to 8243 conditions per place. [2021-12-16 03:03:38,244 INFO L132 encePairwiseOnDemand]: 207/246 looper letters, 549 selfloop transitions, 307 changer transitions 0/1006 dead transitions. [2021-12-16 03:03:38,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1006 transitions, 9832 flow [2021-12-16 03:03:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-16 03:03:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-16 03:03:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7681 transitions. [2021-12-16 03:03:38,250 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6504911924119241 [2021-12-16 03:03:38,250 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7681 transitions. [2021-12-16 03:03:38,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7681 transitions. [2021-12-16 03:03:38,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:38,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7681 transitions. [2021-12-16 03:03:38,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 160.02083333333334) internal successors, (7681), 48 states have internal predecessors, (7681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:38,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 246.0) internal successors, (12054), 49 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:38,265 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 246.0) internal successors, (12054), 49 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:38,266 INFO L186 Difference]: Start difference. First operand has 399 places, 451 transitions, 3300 flow. Second operand 48 states and 7681 transitions. [2021-12-16 03:03:38,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1006 transitions, 9832 flow