./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/security.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/security.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be --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 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:24:08,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:24:08,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:24:08,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:24:08,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:24:08,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:24:08,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:24:08,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:24:08,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:24:08,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:24:08,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:24:08,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:24:08,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:24:08,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:24:08,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:24:08,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:24:08,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:24:08,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:24:08,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:24:08,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:24:08,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:24:08,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:24:08,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:24:08,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:24:08,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:24:08,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:24:08,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:24:08,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:24:08,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:24:08,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:24:08,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:24:08,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:24:08,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:24:08,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:24:08,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:24:08,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:24:08,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:24:08,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:24:08,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:24:08,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:24:08,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:24:08,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:24:08,423 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:24:08,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:24:08,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:24:08,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:24:08,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:24:08,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:24:08,432 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:24:08,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:24:08,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:24:08,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:24:08,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:24:08,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:24:08,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:24:08,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:24:08,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:24:08,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:24:08,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:24:08,436 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:24:08,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:24:08,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:24:08,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:24:08,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:24:08,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:24:08,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:24:08,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:24:08,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:24:08,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:24:08,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:24:08,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:24:08,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:24:08,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:24:08,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:24:08,441 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2021-10-21 20:24:08,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:24:08,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:24:08,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:24:08,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:24:08,766 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:24:08,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/weaver/security.wvr.c [2021-10-21 20:24:08,856 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/data/cc989dc37/366487136064484c99e53640404a82ed/FLAGc12468a69 [2021-10-21 20:24:09,297 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:24:09,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/sv-benchmarks/c/weaver/security.wvr.c [2021-10-21 20:24:09,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/data/cc989dc37/366487136064484c99e53640404a82ed/FLAGc12468a69 [2021-10-21 20:24:09,689 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/data/cc989dc37/366487136064484c99e53640404a82ed [2021-10-21 20:24:09,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:24:09,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:24:09,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:24:09,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:24:09,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:24:09,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:24:09" (1/1) ... [2021-10-21 20:24:09,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2cab77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:09, skipping insertion in model container [2021-10-21 20:24:09,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:24:09" (1/1) ... [2021-10-21 20:24:09,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:24:09,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:24:09,954 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-10-21 20:24:09,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:24:09,971 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:24:09,989 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-10-21 20:24:09,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:24:10,004 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:24:10,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10 WrapperNode [2021-10-21 20:24:10,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:24:10,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:24:10,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:24:10,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:24:10,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:24:10,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:24:10,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:24:10,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:24:10,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:24:10,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:24:10,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:24:10,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:24:10,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (1/1) ... [2021-10-21 20:24:10,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:24:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:10,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:24:10,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:24:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-21 20:24:10,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-21 20:24:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-21 20:24:10,165 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-21 20:24:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:24:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:24:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:24:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:24:10,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:24:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:24:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:24:10,167 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-21 20:24:10,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:24:10,505 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-21 20:24:10,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:24:10 BoogieIcfgContainer [2021-10-21 20:24:10,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:24:10,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:24:10,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:24:10,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:24:10,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:24:09" (1/3) ... [2021-10-21 20:24:10,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@887b3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:24:10, skipping insertion in model container [2021-10-21 20:24:10,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:10" (2/3) ... [2021-10-21 20:24:10,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@887b3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:24:10, skipping insertion in model container [2021-10-21 20:24:10,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:24:10" (3/3) ... [2021-10-21 20:24:10,519 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2021-10-21 20:24:10,525 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-21 20:24:10,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:24:10,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:24:10,530 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-21 20:24:10,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,585 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,585 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,585 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,586 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,590 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,591 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,591 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,599 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 20:24:10,606 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-21 20:24:10,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:24:10,656 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 [2021-10-21 20:24:10,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-21 20:24:10,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 166 flow [2021-10-21 20:24:10,719 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2021-10-21 20:24:10,719 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-21 20:24:10,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 3/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2021-10-21 20:24:10,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 166 flow [2021-10-21 20:24:10,728 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 65 transitions, 142 flow [2021-10-21 20:24:10,749 INFO L129 PetriNetUnfolder]: 3/64 cut-off events. [2021-10-21 20:24:10,749 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-21 20:24:10,749 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:10,750 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] [2021-10-21 20:24:10,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 928103298, now seen corresponding path program 1 times [2021-10-21 20:24:10,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:10,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337247443] [2021-10-21 20:24:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:10,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:11,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:11,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337247443] [2021-10-21 20:24:11,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337247443] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:11,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:11,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:24:11,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210413020] [2021-10-21 20:24:11,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:24:11,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:24:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:24:11,535 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 75 [2021-10-21 20:24:11,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 142 flow. Second operand has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:11,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:11,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 75 [2021-10-21 20:24:11,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:11,784 INFO L129 PetriNetUnfolder]: 12/120 cut-off events. [2021-10-21 20:24:11,787 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-21 20:24:11,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 120 events. 12/120 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 4 based on Foata normal form. 3/115 useless extension candidates. Maximal degree in co-relation 99. Up to 26 conditions per place. [2021-10-21 20:24:11,798 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-10-21 20:24:11,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 242 flow [2021-10-21 20:24:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 598 transitions. [2021-10-21 20:24:11,827 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7973333333333333 [2021-10-21 20:24:11,828 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 598 transitions. [2021-10-21 20:24:11,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 598 transitions. [2021-10-21 20:24:11,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:11,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 598 transitions. [2021-10-21 20:24:11,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:11,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:11,850 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:11,852 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 142 flow. Second operand 10 states and 598 transitions. [2021-10-21 20:24:11,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 242 flow [2021-10-21 20:24:11,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-21 20:24:11,860 INFO L242 Difference]: Finished difference. Result has 80 places, 64 transitions, 151 flow [2021-10-21 20:24:11,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=151, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2021-10-21 20:24:11,866 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 11 predicate places. [2021-10-21 20:24:11,867 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 151 flow [2021-10-21 20:24:11,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:11,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:11,869 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] [2021-10-21 20:24:11,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:24:11,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361579, now seen corresponding path program 1 times [2021-10-21 20:24:11,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:11,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63396292] [2021-10-21 20:24:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:11,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:12,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:12,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63396292] [2021-10-21 20:24:12,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63396292] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:12,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:12,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:12,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102483082] [2021-10-21 20:24:12,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:12,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:12,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:12,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:12,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:12,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:12,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:12,477 INFO L129 PetriNetUnfolder]: 13/171 cut-off events. [2021-10-21 20:24:12,477 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-21 20:24:12,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 171 events. 13/171 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 644 event pairs, 0 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 275. Up to 28 conditions per place. [2021-10-21 20:24:12,481 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 27 selfloop transitions, 5 changer transitions 5/82 dead transitions. [2021-10-21 20:24:12,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 293 flow [2021-10-21 20:24:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-10-21 20:24:12,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-10-21 20:24:12,485 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-10-21 20:24:12,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-10-21 20:24:12,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:12,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-10-21 20:24:12,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:12,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:12,491 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:12,491 INFO L186 Difference]: Start difference. First operand has 80 places, 64 transitions, 151 flow. Second operand 9 states and 521 transitions. [2021-10-21 20:24:12,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 293 flow [2021-10-21 20:24:12,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 268 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-10-21 20:24:12,496 INFO L242 Difference]: Finished difference. Result has 82 places, 66 transitions, 178 flow [2021-10-21 20:24:12,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2021-10-21 20:24:12,497 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2021-10-21 20:24:12,497 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 178 flow [2021-10-21 20:24:12,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:12,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:12,498 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] [2021-10-21 20:24:12,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:24:12,499 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1211883793, now seen corresponding path program 2 times [2021-10-21 20:24:12,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:12,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791435485] [2021-10-21 20:24:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:12,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:12,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:12,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791435485] [2021-10-21 20:24:12,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791435485] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:12,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:12,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322971651] [2021-10-21 20:24:12,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:12,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:12,687 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:12,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:12,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:12,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:12,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:13,000 INFO L129 PetriNetUnfolder]: 15/260 cut-off events. [2021-10-21 20:24:13,001 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-21 20:24:13,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 260 events. 15/260 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1451 event pairs, 10 based on Foata normal form. 3/255 useless extension candidates. Maximal degree in co-relation 455. Up to 43 conditions per place. [2021-10-21 20:24:13,004 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 30 selfloop transitions, 4 changer transitions 13/92 dead transitions. [2021-10-21 20:24:13,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 404 flow [2021-10-21 20:24:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:24:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-21 20:24:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 745 transitions. [2021-10-21 20:24:13,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764102564102564 [2021-10-21 20:24:13,015 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 745 transitions. [2021-10-21 20:24:13,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 745 transitions. [2021-10-21 20:24:13,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:13,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 745 transitions. [2021-10-21 20:24:13,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 57.30769230769231) internal successors, (745), 13 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,024 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,024 INFO L186 Difference]: Start difference. First operand has 82 places, 66 transitions, 178 flow. Second operand 13 states and 745 transitions. [2021-10-21 20:24:13,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 404 flow [2021-10-21 20:24:13,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 370 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-10-21 20:24:13,034 INFO L242 Difference]: Finished difference. Result has 97 places, 67 transitions, 214 flow [2021-10-21 20:24:13,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=214, PETRI_PLACES=97, PETRI_TRANSITIONS=67} [2021-10-21 20:24:13,035 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-10-21 20:24:13,035 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 67 transitions, 214 flow [2021-10-21 20:24:13,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,036 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:13,037 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] [2021-10-21 20:24:13,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:24:13,037 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1708637851, now seen corresponding path program 3 times [2021-10-21 20:24:13,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:13,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546286808] [2021-10-21 20:24:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:13,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:13,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:13,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546286808] [2021-10-21 20:24:13,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546286808] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:13,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:13,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:13,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696757984] [2021-10-21 20:24:13,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:13,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:13,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:13,295 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:13,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 67 transitions, 214 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:13,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:13,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:13,602 INFO L129 PetriNetUnfolder]: 14/296 cut-off events. [2021-10-21 20:24:13,602 INFO L130 PetriNetUnfolder]: For 372/374 co-relation queries the response was YES. [2021-10-21 20:24:13,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 296 events. 14/296 cut-off events. For 372/374 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1781 event pairs, 12 based on Foata normal form. 3/292 useless extension candidates. Maximal degree in co-relation 611. Up to 43 conditions per place. [2021-10-21 20:24:13,607 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 38 selfloop transitions, 9 changer transitions 8/100 dead transitions. [2021-10-21 20:24:13,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 540 flow [2021-10-21 20:24:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:24:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-21 20:24:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 808 transitions. [2021-10-21 20:24:13,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7695238095238095 [2021-10-21 20:24:13,617 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 808 transitions. [2021-10-21 20:24:13,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 808 transitions. [2021-10-21 20:24:13,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:13,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 808 transitions. [2021-10-21 20:24:13,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.714285714285715) internal successors, (808), 14 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,624 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,624 INFO L186 Difference]: Start difference. First operand has 97 places, 67 transitions, 214 flow. Second operand 14 states and 808 transitions. [2021-10-21 20:24:13,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 540 flow [2021-10-21 20:24:13,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 438 flow, removed 50 selfloop flow, removed 10 redundant places. [2021-10-21 20:24:13,637 INFO L242 Difference]: Finished difference. Result has 103 places, 74 transitions, 296 flow [2021-10-21 20:24:13,638 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=296, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2021-10-21 20:24:13,638 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 34 predicate places. [2021-10-21 20:24:13,638 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 296 flow [2021-10-21 20:24:13,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,639 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:13,640 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] [2021-10-21 20:24:13,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:24:13,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash -567228287, now seen corresponding path program 4 times [2021-10-21 20:24:13,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:13,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356326112] [2021-10-21 20:24:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:13,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:13,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:13,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356326112] [2021-10-21 20:24:13,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356326112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:13,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:13,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:13,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532104676] [2021-10-21 20:24:13,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:13,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:13,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:13,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:13,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 296 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:13,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:13,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:13,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:14,088 INFO L129 PetriNetUnfolder]: 12/279 cut-off events. [2021-10-21 20:24:14,088 INFO L130 PetriNetUnfolder]: For 408/415 co-relation queries the response was YES. [2021-10-21 20:24:14,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 279 events. 12/279 cut-off events. For 408/415 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1657 event pairs, 1 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 605. Up to 52 conditions per place. [2021-10-21 20:24:14,091 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 42 selfloop transitions, 6 changer transitions 8/101 dead transitions. [2021-10-21 20:24:14,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 589 flow [2021-10-21 20:24:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-10-21 20:24:14,094 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851851851851852 [2021-10-21 20:24:14,095 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-10-21 20:24:14,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-10-21 20:24:14,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:14,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-10-21 20:24:14,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,103 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,103 INFO L186 Difference]: Start difference. First operand has 103 places, 74 transitions, 296 flow. Second operand 9 states and 530 transitions. [2021-10-21 20:24:14,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 589 flow [2021-10-21 20:24:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 525 flow, removed 32 selfloop flow, removed 6 redundant places. [2021-10-21 20:24:14,112 INFO L242 Difference]: Finished difference. Result has 106 places, 75 transitions, 321 flow [2021-10-21 20:24:14,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2021-10-21 20:24:14,112 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 37 predicate places. [2021-10-21 20:24:14,113 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 321 flow [2021-10-21 20:24:14,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,114 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:14,114 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] [2021-10-21 20:24:14,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:24:14,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash -623879787, now seen corresponding path program 5 times [2021-10-21 20:24:14,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:14,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022905942] [2021-10-21 20:24:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:14,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:14,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:14,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022905942] [2021-10-21 20:24:14,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022905942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:14,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:14,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:14,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892939970] [2021-10-21 20:24:14,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:14,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:14,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:14,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 321 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:14,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:14,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:14,487 INFO L129 PetriNetUnfolder]: 11/266 cut-off events. [2021-10-21 20:24:14,487 INFO L130 PetriNetUnfolder]: For 513/530 co-relation queries the response was YES. [2021-10-21 20:24:14,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 266 events. 11/266 cut-off events. For 513/530 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1523 event pairs, 10 based on Foata normal form. 4/263 useless extension candidates. Maximal degree in co-relation 576. Up to 43 conditions per place. [2021-10-21 20:24:14,489 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 8/92 dead transitions. [2021-10-21 20:24:14,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 92 transitions, 521 flow [2021-10-21 20:24:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2021-10-21 20:24:14,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7792592592592592 [2021-10-21 20:24:14,493 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2021-10-21 20:24:14,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2021-10-21 20:24:14,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:14,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2021-10-21 20:24:14,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,498 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,498 INFO L186 Difference]: Start difference. First operand has 106 places, 75 transitions, 321 flow. Second operand 9 states and 526 transitions. [2021-10-21 20:24:14,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 92 transitions, 521 flow [2021-10-21 20:24:14,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 479 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-10-21 20:24:14,507 INFO L242 Difference]: Finished difference. Result has 108 places, 73 transitions, 300 flow [2021-10-21 20:24:14,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=300, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2021-10-21 20:24:14,508 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-21 20:24:14,509 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 300 flow [2021-10-21 20:24:14,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:14,510 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] [2021-10-21 20:24:14,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:24:14,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash -95163099, now seen corresponding path program 6 times [2021-10-21 20:24:14,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:14,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844045378] [2021-10-21 20:24:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:14,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:14,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:14,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844045378] [2021-10-21 20:24:14,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844045378] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:14,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:14,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:14,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753205662] [2021-10-21 20:24:14,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:14,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:14,703 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:14,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 300 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:14,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:14,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:14,875 INFO L129 PetriNetUnfolder]: 11/232 cut-off events. [2021-10-21 20:24:14,875 INFO L130 PetriNetUnfolder]: For 427/445 co-relation queries the response was YES. [2021-10-21 20:24:14,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 232 events. 11/232 cut-off events. For 427/445 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1208 event pairs, 10 based on Foata normal form. 3/229 useless extension candidates. Maximal degree in co-relation 498. Up to 43 conditions per place. [2021-10-21 20:24:14,877 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 28 selfloop transitions, 2 changer transitions 10/85 dead transitions. [2021-10-21 20:24:14,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 459 flow [2021-10-21 20:24:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-10-21 20:24:14,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-10-21 20:24:14,880 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-10-21 20:24:14,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-10-21 20:24:14,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:14,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-10-21 20:24:14,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,886 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,886 INFO L186 Difference]: Start difference. First operand has 108 places, 73 transitions, 300 flow. Second operand 9 states and 521 transitions. [2021-10-21 20:24:14,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 459 flow [2021-10-21 20:24:14,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 85 transitions, 415 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-10-21 20:24:14,892 INFO L242 Difference]: Finished difference. Result has 108 places, 69 transitions, 250 flow [2021-10-21 20:24:14,892 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=108, PETRI_TRANSITIONS=69} [2021-10-21 20:24:14,893 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-21 20:24:14,893 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 69 transitions, 250 flow [2021-10-21 20:24:14,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:14,893 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:14,894 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] [2021-10-21 20:24:14,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:24:14,894 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:14,895 INFO L82 PathProgramCache]: Analyzing trace with hash -607430529, now seen corresponding path program 7 times [2021-10-21 20:24:14,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:14,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126183041] [2021-10-21 20:24:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:14,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:15,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:15,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126183041] [2021-10-21 20:24:15,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126183041] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:15,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:15,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:15,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766985360] [2021-10-21 20:24:15,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:15,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:15,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:15,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:15,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:15,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 69 transitions, 250 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:15,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:15,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:15,180 INFO L129 PetriNetUnfolder]: 11/192 cut-off events. [2021-10-21 20:24:15,180 INFO L130 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2021-10-21 20:24:15,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 192 events. 11/192 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 830 event pairs, 0 based on Foata normal form. 1/186 useless extension candidates. Maximal degree in co-relation 404. Up to 33 conditions per place. [2021-10-21 20:24:15,182 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 5 changer transitions 6/82 dead transitions. [2021-10-21 20:24:15,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 82 transitions, 390 flow [2021-10-21 20:24:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2021-10-21 20:24:15,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7688888888888888 [2021-10-21 20:24:15,185 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2021-10-21 20:24:15,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2021-10-21 20:24:15,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:15,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2021-10-21 20:24:15,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,190 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,191 INFO L186 Difference]: Start difference. First operand has 108 places, 69 transitions, 250 flow. Second operand 9 states and 519 transitions. [2021-10-21 20:24:15,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 82 transitions, 390 flow [2021-10-21 20:24:15,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 351 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-10-21 20:24:15,195 INFO L242 Difference]: Finished difference. Result has 101 places, 68 transitions, 237 flow [2021-10-21 20:24:15,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=237, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2021-10-21 20:24:15,196 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 32 predicate places. [2021-10-21 20:24:15,196 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 237 flow [2021-10-21 20:24:15,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:15,197 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] [2021-10-21 20:24:15,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:24:15,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1515168241, now seen corresponding path program 8 times [2021-10-21 20:24:15,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:15,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073348330] [2021-10-21 20:24:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:15,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:15,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:15,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073348330] [2021-10-21 20:24:15,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073348330] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:15,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:15,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:15,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970221546] [2021-10-21 20:24:15,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:15,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:15,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:15,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 237 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:15,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:15,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:15,480 INFO L129 PetriNetUnfolder]: 11/175 cut-off events. [2021-10-21 20:24:15,481 INFO L130 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2021-10-21 20:24:15,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 175 events. 11/175 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 692 event pairs, 0 based on Foata normal form. 1/169 useless extension candidates. Maximal degree in co-relation 369. Up to 33 conditions per place. [2021-10-21 20:24:15,482 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-10-21 20:24:15,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 81 transitions, 380 flow [2021-10-21 20:24:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2021-10-21 20:24:15,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-10-21 20:24:15,485 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2021-10-21 20:24:15,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2021-10-21 20:24:15,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:15,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2021-10-21 20:24:15,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,490 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,490 INFO L186 Difference]: Start difference. First operand has 101 places, 68 transitions, 237 flow. Second operand 9 states and 520 transitions. [2021-10-21 20:24:15,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 81 transitions, 380 flow [2021-10-21 20:24:15,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 81 transitions, 329 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-10-21 20:24:15,495 INFO L242 Difference]: Finished difference. Result has 97 places, 65 transitions, 189 flow [2021-10-21 20:24:15,495 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=189, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2021-10-21 20:24:15,495 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-10-21 20:24:15,495 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 189 flow [2021-10-21 20:24:15,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,496 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:15,496 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] [2021-10-21 20:24:15,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:24:15,496 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1185092991, now seen corresponding path program 9 times [2021-10-21 20:24:15,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:15,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417819791] [2021-10-21 20:24:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:15,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:15,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:15,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417819791] [2021-10-21 20:24:15,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417819791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:15,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:15,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:15,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602722135] [2021-10-21 20:24:15,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:15,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:15,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:15,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 189 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:15,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:15,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:15,778 INFO L129 PetriNetUnfolder]: 10/166 cut-off events. [2021-10-21 20:24:15,778 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-21 20:24:15,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 166 events. 10/166 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 623 event pairs, 0 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 325. Up to 30 conditions per place. [2021-10-21 20:24:15,780 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 21 selfloop transitions, 5 changer transitions 6/77 dead transitions. [2021-10-21 20:24:15,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 77 transitions, 313 flow [2021-10-21 20:24:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 516 transitions. [2021-10-21 20:24:15,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7644444444444445 [2021-10-21 20:24:15,783 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 516 transitions. [2021-10-21 20:24:15,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 516 transitions. [2021-10-21 20:24:15,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:15,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 516 transitions. [2021-10-21 20:24:15,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.333333333333336) internal successors, (516), 9 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,788 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,788 INFO L186 Difference]: Start difference. First operand has 97 places, 65 transitions, 189 flow. Second operand 9 states and 516 transitions. [2021-10-21 20:24:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 77 transitions, 313 flow [2021-10-21 20:24:15,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 280 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-10-21 20:24:15,792 INFO L242 Difference]: Finished difference. Result has 92 places, 65 transitions, 187 flow [2021-10-21 20:24:15,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=187, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2021-10-21 20:24:15,792 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-10-21 20:24:15,792 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 187 flow [2021-10-21 20:24:15,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:15,793 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] [2021-10-21 20:24:15,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:24:15,794 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash 678766821, now seen corresponding path program 10 times [2021-10-21 20:24:15,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:15,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867016470] [2021-10-21 20:24:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:15,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:15,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:15,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867016470] [2021-10-21 20:24:15,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867016470] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:15,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:15,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 20:24:15,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343871097] [2021-10-21 20:24:15,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:24:15,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:24:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:15,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-21 20:24:15,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 187 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:15,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:15,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-21 20:24:15,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:16,068 INFO L129 PetriNetUnfolder]: 10/150 cut-off events. [2021-10-21 20:24:16,068 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-10-21 20:24:16,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 150 events. 10/150 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 511 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 296. Up to 28 conditions per place. [2021-10-21 20:24:16,069 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 19 selfloop transitions, 3 changer transitions 10/75 dead transitions. [2021-10-21 20:24:16,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 75 transitions, 299 flow [2021-10-21 20:24:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 20:24:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 515 transitions. [2021-10-21 20:24:16,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2021-10-21 20:24:16,072 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 515 transitions. [2021-10-21 20:24:16,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 515 transitions. [2021-10-21 20:24:16,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:16,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 515 transitions. [2021-10-21 20:24:16,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.22222222222222) internal successors, (515), 9 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,078 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,078 INFO L186 Difference]: Start difference. First operand has 92 places, 65 transitions, 187 flow. Second operand 9 states and 515 transitions. [2021-10-21 20:24:16,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 75 transitions, 299 flow [2021-10-21 20:24:16,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 271 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-10-21 20:24:16,081 INFO L242 Difference]: Finished difference. Result has 92 places, 61 transitions, 161 flow [2021-10-21 20:24:16,081 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=161, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2021-10-21 20:24:16,082 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-10-21 20:24:16,082 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 161 flow [2021-10-21 20:24:16,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:16,083 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] [2021-10-21 20:24:16,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 20:24:16,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash -436103984, now seen corresponding path program 1 times [2021-10-21 20:24:16,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:16,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833370033] [2021-10-21 20:24:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:16,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:16,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:16,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833370033] [2021-10-21 20:24:16,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833370033] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:16,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:16,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:16,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961027438] [2021-10-21 20:24:16,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:16,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:16,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:16,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 161 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:16,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:16,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:16,504 INFO L129 PetriNetUnfolder]: 13/165 cut-off events. [2021-10-21 20:24:16,504 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-10-21 20:24:16,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 165 events. 13/165 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 627 event pairs, 0 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 324. Up to 17 conditions per place. [2021-10-21 20:24:16,505 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 30 selfloop transitions, 3 changer transitions 13/87 dead transitions. [2021-10-21 20:24:16,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 428 flow [2021-10-21 20:24:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:24:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-21 20:24:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 771 transitions. [2021-10-21 20:24:16,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7342857142857143 [2021-10-21 20:24:16,509 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 771 transitions. [2021-10-21 20:24:16,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 771 transitions. [2021-10-21 20:24:16,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:16,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 771 transitions. [2021-10-21 20:24:16,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.07142857142857) internal successors, (771), 14 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,515 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,515 INFO L186 Difference]: Start difference. First operand has 92 places, 61 transitions, 161 flow. Second operand 14 states and 771 transitions. [2021-10-21 20:24:16,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 428 flow [2021-10-21 20:24:16,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 339 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-10-21 20:24:16,519 INFO L242 Difference]: Finished difference. Result has 91 places, 61 transitions, 172 flow [2021-10-21 20:24:16,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=172, PETRI_PLACES=91, PETRI_TRANSITIONS=61} [2021-10-21 20:24:16,519 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 22 predicate places. [2021-10-21 20:24:16,519 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 61 transitions, 172 flow [2021-10-21 20:24:16,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:16,520 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] [2021-10-21 20:24:16,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:24:16,521 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -693633984, now seen corresponding path program 2 times [2021-10-21 20:24:16,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:16,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700334951] [2021-10-21 20:24:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:16,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:16,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:16,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700334951] [2021-10-21 20:24:16,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700334951] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:16,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:16,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:16,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933863728] [2021-10-21 20:24:16,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:16,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:16,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:16,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 61 transitions, 172 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:16,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:16,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:16,851 INFO L129 PetriNetUnfolder]: 11/156 cut-off events. [2021-10-21 20:24:16,852 INFO L130 PetriNetUnfolder]: For 86/88 co-relation queries the response was YES. [2021-10-21 20:24:16,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 156 events. 11/156 cut-off events. For 86/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 537 event pairs, 0 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 314. Up to 20 conditions per place. [2021-10-21 20:24:16,853 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 22 selfloop transitions, 5 changer transitions 7/75 dead transitions. [2021-10-21 20:24:16,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 302 flow [2021-10-21 20:24:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-21 20:24:16,855 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-21 20:24:16,855 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-21 20:24:16,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-21 20:24:16,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:16,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-21 20:24:16,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,860 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,860 INFO L186 Difference]: Start difference. First operand has 91 places, 61 transitions, 172 flow. Second operand 10 states and 554 transitions. [2021-10-21 20:24:16,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 302 flow [2021-10-21 20:24:16,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 249 flow, removed 15 selfloop flow, removed 12 redundant places. [2021-10-21 20:24:16,863 INFO L242 Difference]: Finished difference. Result has 85 places, 61 transitions, 169 flow [2021-10-21 20:24:16,863 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=169, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2021-10-21 20:24:16,864 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2021-10-21 20:24:16,864 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 169 flow [2021-10-21 20:24:16,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:16,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:16,865 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] [2021-10-21 20:24:16,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 20:24:16,865 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:16,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1829380162, now seen corresponding path program 3 times [2021-10-21 20:24:16,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:16,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949651294] [2021-10-21 20:24:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:16,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:17,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:17,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949651294] [2021-10-21 20:24:17,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949651294] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:17,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:17,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:17,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273760753] [2021-10-21 20:24:17,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:17,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:17,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:17,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 169 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:17,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:17,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:17,219 INFO L129 PetriNetUnfolder]: 12/198 cut-off events. [2021-10-21 20:24:17,219 INFO L130 PetriNetUnfolder]: For 120/122 co-relation queries the response was YES. [2021-10-21 20:24:17,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 198 events. 12/198 cut-off events. For 120/122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 851 event pairs, 0 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 393. Up to 27 conditions per place. [2021-10-21 20:24:17,221 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 4 changer transitions 7/87 dead transitions. [2021-10-21 20:24:17,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 433 flow [2021-10-21 20:24:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 562 transitions. [2021-10-21 20:24:17,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7493333333333333 [2021-10-21 20:24:17,223 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 562 transitions. [2021-10-21 20:24:17,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 562 transitions. [2021-10-21 20:24:17,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:17,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 562 transitions. [2021-10-21 20:24:17,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,227 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,228 INFO L186 Difference]: Start difference. First operand has 85 places, 61 transitions, 169 flow. Second operand 10 states and 562 transitions. [2021-10-21 20:24:17,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 433 flow [2021-10-21 20:24:17,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 376 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-10-21 20:24:17,231 INFO L242 Difference]: Finished difference. Result has 88 places, 63 transitions, 186 flow [2021-10-21 20:24:17,231 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2021-10-21 20:24:17,232 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 19 predicate places. [2021-10-21 20:24:17,232 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 186 flow [2021-10-21 20:24:17,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:17,233 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] [2021-10-21 20:24:17,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 20:24:17,233 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1575729550, now seen corresponding path program 4 times [2021-10-21 20:24:17,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:17,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225394209] [2021-10-21 20:24:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:17,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:17,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:17,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225394209] [2021-10-21 20:24:17,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225394209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:17,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:17,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:17,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355961446] [2021-10-21 20:24:17,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:17,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:17,391 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:17,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:17,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:17,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:17,606 INFO L129 PetriNetUnfolder]: 12/259 cut-off events. [2021-10-21 20:24:17,606 INFO L130 PetriNetUnfolder]: For 170/178 co-relation queries the response was YES. [2021-10-21 20:24:17,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 259 events. 12/259 cut-off events. For 170/178 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1388 event pairs, 3 based on Foata normal form. 2/257 useless extension candidates. Maximal degree in co-relation 525. Up to 49 conditions per place. [2021-10-21 20:24:17,608 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 29 selfloop transitions, 7 changer transitions 7/84 dead transitions. [2021-10-21 20:24:17,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 383 flow [2021-10-21 20:24:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2021-10-21 20:24:17,610 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7453333333333333 [2021-10-21 20:24:17,610 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 559 transitions. [2021-10-21 20:24:17,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 559 transitions. [2021-10-21 20:24:17,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:17,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 559 transitions. [2021-10-21 20:24:17,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.9) internal successors, (559), 10 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,615 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,615 INFO L186 Difference]: Start difference. First operand has 88 places, 63 transitions, 186 flow. Second operand 10 states and 559 transitions. [2021-10-21 20:24:17,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 383 flow [2021-10-21 20:24:17,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 352 flow, removed 10 selfloop flow, removed 6 redundant places. [2021-10-21 20:24:17,618 INFO L242 Difference]: Finished difference. Result has 94 places, 66 transitions, 232 flow [2021-10-21 20:24:17,619 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=94, PETRI_TRANSITIONS=66} [2021-10-21 20:24:17,619 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 25 predicate places. [2021-10-21 20:24:17,619 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 66 transitions, 232 flow [2021-10-21 20:24:17,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,620 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:17,620 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] [2021-10-21 20:24:17,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 20:24:17,620 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2058148696, now seen corresponding path program 5 times [2021-10-21 20:24:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:17,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840524716] [2021-10-21 20:24:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:17,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:17,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:17,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840524716] [2021-10-21 20:24:17,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840524716] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:17,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:17,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:17,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908844465] [2021-10-21 20:24:17,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:17,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:17,775 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:17,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 66 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:17,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:17,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:17,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:18,056 INFO L129 PetriNetUnfolder]: 9/283 cut-off events. [2021-10-21 20:24:18,056 INFO L130 PetriNetUnfolder]: For 306/316 co-relation queries the response was YES. [2021-10-21 20:24:18,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 283 events. 9/283 cut-off events. For 306/316 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1615 event pairs, 2 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 614. Up to 44 conditions per place. [2021-10-21 20:24:18,059 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 36 selfloop transitions, 10 changer transitions 13/100 dead transitions. [2021-10-21 20:24:18,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 100 transitions, 588 flow [2021-10-21 20:24:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 20:24:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-21 20:24:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 832 transitions. [2021-10-21 20:24:18,062 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7395555555555555 [2021-10-21 20:24:18,062 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 832 transitions. [2021-10-21 20:24:18,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 832 transitions. [2021-10-21 20:24:18,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:18,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 832 transitions. [2021-10-21 20:24:18,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.46666666666667) internal successors, (832), 15 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,068 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,068 INFO L186 Difference]: Start difference. First operand has 94 places, 66 transitions, 232 flow. Second operand 15 states and 832 transitions. [2021-10-21 20:24:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 100 transitions, 588 flow [2021-10-21 20:24:18,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 542 flow, removed 16 selfloop flow, removed 6 redundant places. [2021-10-21 20:24:18,073 INFO L242 Difference]: Finished difference. Result has 110 places, 72 transitions, 338 flow [2021-10-21 20:24:18,074 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=338, PETRI_PLACES=110, PETRI_TRANSITIONS=72} [2021-10-21 20:24:18,074 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-10-21 20:24:18,074 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 72 transitions, 338 flow [2021-10-21 20:24:18,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,075 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:18,075 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] [2021-10-21 20:24:18,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 20:24:18,075 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:18,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1161562930, now seen corresponding path program 6 times [2021-10-21 20:24:18,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:18,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423483866] [2021-10-21 20:24:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:18,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:18,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:18,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423483866] [2021-10-21 20:24:18,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423483866] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:18,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:18,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:18,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558554904] [2021-10-21 20:24:18,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:18,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:18,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:18,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:18,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:18,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 72 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:18,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:18,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:18,567 INFO L129 PetriNetUnfolder]: 11/354 cut-off events. [2021-10-21 20:24:18,568 INFO L130 PetriNetUnfolder]: For 692/706 co-relation queries the response was YES. [2021-10-21 20:24:18,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 354 events. 11/354 cut-off events. For 692/706 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2330 event pairs, 6 based on Foata normal form. 4/355 useless extension candidates. Maximal degree in co-relation 908. Up to 42 conditions per place. [2021-10-21 20:24:18,571 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 38 selfloop transitions, 18 changer transitions 13/110 dead transitions. [2021-10-21 20:24:18,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 787 flow [2021-10-21 20:24:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:24:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-21 20:24:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 887 transitions. [2021-10-21 20:24:18,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7391666666666666 [2021-10-21 20:24:18,574 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 887 transitions. [2021-10-21 20:24:18,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 887 transitions. [2021-10-21 20:24:18,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:18,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 887 transitions. [2021-10-21 20:24:18,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.4375) internal successors, (887), 16 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,581 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,581 INFO L186 Difference]: Start difference. First operand has 110 places, 72 transitions, 338 flow. Second operand 16 states and 887 transitions. [2021-10-21 20:24:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 787 flow [2021-10-21 20:24:18,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 710 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-10-21 20:24:18,589 INFO L242 Difference]: Finished difference. Result has 123 places, 80 transitions, 502 flow [2021-10-21 20:24:18,589 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=502, PETRI_PLACES=123, PETRI_TRANSITIONS=80} [2021-10-21 20:24:18,590 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 54 predicate places. [2021-10-21 20:24:18,590 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 80 transitions, 502 flow [2021-10-21 20:24:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,591 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:18,591 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] [2021-10-21 20:24:18,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 20:24:18,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -265714934, now seen corresponding path program 7 times [2021-10-21 20:24:18,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:18,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536607010] [2021-10-21 20:24:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:18,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:18,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:18,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536607010] [2021-10-21 20:24:18,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536607010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:18,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:18,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:18,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453626162] [2021-10-21 20:24:18,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:18,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:18,732 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:18,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 80 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:18,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:18,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:18,965 INFO L129 PetriNetUnfolder]: 10/343 cut-off events. [2021-10-21 20:24:18,965 INFO L130 PetriNetUnfolder]: For 1123/1143 co-relation queries the response was YES. [2021-10-21 20:24:18,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 343 events. 10/343 cut-off events. For 1123/1143 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2240 event pairs, 4 based on Foata normal form. 3/343 useless extension candidates. Maximal degree in co-relation 955. Up to 57 conditions per place. [2021-10-21 20:24:18,968 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 47 selfloop transitions, 7 changer transitions 11/106 dead transitions. [2021-10-21 20:24:18,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 106 transitions, 904 flow [2021-10-21 20:24:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-21 20:24:18,970 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-21 20:24:18,971 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-21 20:24:18,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-21 20:24:18,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:18,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-21 20:24:18,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,976 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,976 INFO L186 Difference]: Start difference. First operand has 123 places, 80 transitions, 502 flow. Second operand 10 states and 561 transitions. [2021-10-21 20:24:18,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 106 transitions, 904 flow [2021-10-21 20:24:18,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 842 flow, removed 31 selfloop flow, removed 8 redundant places. [2021-10-21 20:24:18,986 INFO L242 Difference]: Finished difference. Result has 124 places, 83 transitions, 545 flow [2021-10-21 20:24:18,986 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2021-10-21 20:24:18,986 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 55 predicate places. [2021-10-21 20:24:18,987 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 545 flow [2021-10-21 20:24:18,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:18,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:18,987 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] [2021-10-21 20:24:18,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 20:24:18,988 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash -391569458, now seen corresponding path program 8 times [2021-10-21 20:24:18,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:18,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870721670] [2021-10-21 20:24:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:18,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:19,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:19,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870721670] [2021-10-21 20:24:19,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870721670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:19,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:19,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:19,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902733860] [2021-10-21 20:24:19,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:19,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:19,123 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:19,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 545 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:19,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:19,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:19,401 INFO L129 PetriNetUnfolder]: 10/317 cut-off events. [2021-10-21 20:24:19,402 INFO L130 PetriNetUnfolder]: For 1160/1192 co-relation queries the response was YES. [2021-10-21 20:24:19,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 317 events. 10/317 cut-off events. For 1160/1192 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 5 based on Foata normal form. 12/326 useless extension candidates. Maximal degree in co-relation 909. Up to 64 conditions per place. [2021-10-21 20:24:19,404 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 31 selfloop transitions, 5 changer transitions 29/106 dead transitions. [2021-10-21 20:24:19,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 106 transitions, 926 flow [2021-10-21 20:24:19,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 20:24:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-21 20:24:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2021-10-21 20:24:19,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7324444444444445 [2021-10-21 20:24:19,407 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2021-10-21 20:24:19,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2021-10-21 20:24:19,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:19,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2021-10-21 20:24:19,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,413 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,414 INFO L186 Difference]: Start difference. First operand has 124 places, 83 transitions, 545 flow. Second operand 15 states and 824 transitions. [2021-10-21 20:24:19,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 106 transitions, 926 flow [2021-10-21 20:24:19,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 106 transitions, 891 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-10-21 20:24:19,424 INFO L242 Difference]: Finished difference. Result has 136 places, 73 transitions, 396 flow [2021-10-21 20:24:19,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=396, PETRI_PLACES=136, PETRI_TRANSITIONS=73} [2021-10-21 20:24:19,425 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 67 predicate places. [2021-10-21 20:24:19,425 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 73 transitions, 396 flow [2021-10-21 20:24:19,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:19,426 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] [2021-10-21 20:24:19,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 20:24:19,426 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash -657014896, now seen corresponding path program 9 times [2021-10-21 20:24:19,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:19,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115981534] [2021-10-21 20:24:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:19,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:19,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115981534] [2021-10-21 20:24:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115981534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:19,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:19,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:19,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944203324] [2021-10-21 20:24:19,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:19,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:19,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:19,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 73 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:19,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:19,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:19,866 INFO L129 PetriNetUnfolder]: 7/278 cut-off events. [2021-10-21 20:24:19,866 INFO L130 PetriNetUnfolder]: For 993/1015 co-relation queries the response was YES. [2021-10-21 20:24:19,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 278 events. 7/278 cut-off events. For 993/1015 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1601 event pairs, 5 based on Foata normal form. 7/283 useless extension candidates. Maximal degree in co-relation 813. Up to 41 conditions per place. [2021-10-21 20:24:19,869 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 40 selfloop transitions, 11 changer transitions 14/106 dead transitions. [2021-10-21 20:24:19,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 106 transitions, 816 flow [2021-10-21 20:24:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:24:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-21 20:24:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 890 transitions. [2021-10-21 20:24:19,872 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7416666666666667 [2021-10-21 20:24:19,872 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 890 transitions. [2021-10-21 20:24:19,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 890 transitions. [2021-10-21 20:24:19,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:19,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 890 transitions. [2021-10-21 20:24:19,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,896 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,897 INFO L186 Difference]: Start difference. First operand has 136 places, 73 transitions, 396 flow. Second operand 16 states and 890 transitions. [2021-10-21 20:24:19,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 106 transitions, 816 flow [2021-10-21 20:24:19,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 106 transitions, 667 flow, removed 69 selfloop flow, removed 15 redundant places. [2021-10-21 20:24:19,905 INFO L242 Difference]: Finished difference. Result has 130 places, 77 transitions, 445 flow [2021-10-21 20:24:19,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=445, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-10-21 20:24:19,905 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-10-21 20:24:19,905 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 445 flow [2021-10-21 20:24:19,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:19,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:19,906 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] [2021-10-21 20:24:19,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 20:24:19,906 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:19,907 INFO L82 PathProgramCache]: Analyzing trace with hash -760491658, now seen corresponding path program 10 times [2021-10-21 20:24:19,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:19,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624101857] [2021-10-21 20:24:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:19,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:20,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:20,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624101857] [2021-10-21 20:24:20,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624101857] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:20,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:20,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:20,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801505149] [2021-10-21 20:24:20,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:20,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:20,056 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:20,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 77 transitions, 445 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:20,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:20,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:20,247 INFO L129 PetriNetUnfolder]: 6/270 cut-off events. [2021-10-21 20:24:20,247 INFO L130 PetriNetUnfolder]: For 802/823 co-relation queries the response was YES. [2021-10-21 20:24:20,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 270 events. 6/270 cut-off events. For 802/823 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1531 event pairs, 5 based on Foata normal form. 5/273 useless extension candidates. Maximal degree in co-relation 758. Up to 51 conditions per place. [2021-10-21 20:24:20,249 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 8 changer transitions 10/94 dead transitions. [2021-10-21 20:24:20,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 94 transitions, 709 flow [2021-10-21 20:24:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-21 20:24:20,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-21 20:24:20,255 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-21 20:24:20,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-21 20:24:20,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:20,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-21 20:24:20,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,260 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,260 INFO L186 Difference]: Start difference. First operand has 130 places, 77 transitions, 445 flow. Second operand 10 states and 561 transitions. [2021-10-21 20:24:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 94 transitions, 709 flow [2021-10-21 20:24:20,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 654 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-10-21 20:24:20,267 INFO L242 Difference]: Finished difference. Result has 129 places, 77 transitions, 440 flow [2021-10-21 20:24:20,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=440, PETRI_PLACES=129, PETRI_TRANSITIONS=77} [2021-10-21 20:24:20,268 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 60 predicate places. [2021-10-21 20:24:20,268 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 77 transitions, 440 flow [2021-10-21 20:24:20,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:20,269 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] [2021-10-21 20:24:20,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 20:24:20,269 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:20,270 INFO L82 PathProgramCache]: Analyzing trace with hash -617420912, now seen corresponding path program 11 times [2021-10-21 20:24:20,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:20,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413461456] [2021-10-21 20:24:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:20,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:20,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:20,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413461456] [2021-10-21 20:24:20,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413461456] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:20,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:20,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:20,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565283681] [2021-10-21 20:24:20,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:20,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:20,423 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:20,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 77 transitions, 440 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:20,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:20,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:20,629 INFO L129 PetriNetUnfolder]: 5/261 cut-off events. [2021-10-21 20:24:20,629 INFO L130 PetriNetUnfolder]: For 698/711 co-relation queries the response was YES. [2021-10-21 20:24:20,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 261 events. 5/261 cut-off events. For 698/711 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1432 event pairs, 5 based on Foata normal form. 5/264 useless extension candidates. Maximal degree in co-relation 705. Up to 49 conditions per place. [2021-10-21 20:24:20,631 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 39 selfloop transitions, 8 changer transitions 8/96 dead transitions. [2021-10-21 20:24:20,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 96 transitions, 689 flow [2021-10-21 20:24:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 565 transitions. [2021-10-21 20:24:20,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2021-10-21 20:24:20,634 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 565 transitions. [2021-10-21 20:24:20,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 565 transitions. [2021-10-21 20:24:20,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:20,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 565 transitions. [2021-10-21 20:24:20,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,638 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,638 INFO L186 Difference]: Start difference. First operand has 129 places, 77 transitions, 440 flow. Second operand 10 states and 565 transitions. [2021-10-21 20:24:20,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 96 transitions, 689 flow [2021-10-21 20:24:20,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 96 transitions, 612 flow, removed 24 selfloop flow, removed 10 redundant places. [2021-10-21 20:24:20,648 INFO L242 Difference]: Finished difference. Result has 130 places, 79 transitions, 450 flow [2021-10-21 20:24:20,648 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=450, PETRI_PLACES=130, PETRI_TRANSITIONS=79} [2021-10-21 20:24:20,648 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-10-21 20:24:20,649 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 79 transitions, 450 flow [2021-10-21 20:24:20,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,649 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:20,649 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] [2021-10-21 20:24:20,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 20:24:20,650 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2143425732, now seen corresponding path program 12 times [2021-10-21 20:24:20,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:20,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351989876] [2021-10-21 20:24:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:20,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:20,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:20,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351989876] [2021-10-21 20:24:20,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351989876] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:20,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:20,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:20,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640515429] [2021-10-21 20:24:20,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:20,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:20,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:20,804 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:20,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 79 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:20,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:20,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:20,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:20,997 INFO L129 PetriNetUnfolder]: 5/248 cut-off events. [2021-10-21 20:24:20,997 INFO L130 PetriNetUnfolder]: For 542/555 co-relation queries the response was YES. [2021-10-21 20:24:20,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 248 events. 5/248 cut-off events. For 542/555 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1320 event pairs, 5 based on Foata normal form. 5/251 useless extension candidates. Maximal degree in co-relation 658. Up to 49 conditions per place. [2021-10-21 20:24:20,999 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 12/92 dead transitions. [2021-10-21 20:24:20,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 92 transitions, 653 flow [2021-10-21 20:24:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-21 20:24:21,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-21 20:24:21,002 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-21 20:24:21,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-21 20:24:21,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:21,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-21 20:24:21,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,007 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,007 INFO L186 Difference]: Start difference. First operand has 130 places, 79 transitions, 450 flow. Second operand 10 states and 561 transitions. [2021-10-21 20:24:21,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 92 transitions, 653 flow [2021-10-21 20:24:21,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 92 transitions, 617 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-10-21 20:24:21,014 INFO L242 Difference]: Finished difference. Result has 133 places, 75 transitions, 391 flow [2021-10-21 20:24:21,014 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=133, PETRI_TRANSITIONS=75} [2021-10-21 20:24:21,014 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-10-21 20:24:21,015 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 75 transitions, 391 flow [2021-10-21 20:24:21,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:21,015 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] [2021-10-21 20:24:21,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 20:24:21,016 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 159473990, now seen corresponding path program 13 times [2021-10-21 20:24:21,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:21,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529897661] [2021-10-21 20:24:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:21,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:21,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:21,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529897661] [2021-10-21 20:24:21,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529897661] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:21,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:21,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:21,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631231962] [2021-10-21 20:24:21,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:21,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:21,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:21,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:21,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:21,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 75 transitions, 391 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:21,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:21,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:21,434 INFO L129 PetriNetUnfolder]: 5/217 cut-off events. [2021-10-21 20:24:21,435 INFO L130 PetriNetUnfolder]: For 469/482 co-relation queries the response was YES. [2021-10-21 20:24:21,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 217 events. 5/217 cut-off events. For 469/482 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1040 event pairs, 5 based on Foata normal form. 7/222 useless extension candidates. Maximal degree in co-relation 573. Up to 39 conditions per place. [2021-10-21 20:24:21,437 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 21 selfloop transitions, 2 changer transitions 24/88 dead transitions. [2021-10-21 20:24:21,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 88 transitions, 588 flow [2021-10-21 20:24:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:24:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-21 20:24:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 875 transitions. [2021-10-21 20:24:21,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2021-10-21 20:24:21,446 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 875 transitions. [2021-10-21 20:24:21,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 875 transitions. [2021-10-21 20:24:21,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:21,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 875 transitions. [2021-10-21 20:24:21,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.6875) internal successors, (875), 16 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,456 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,456 INFO L186 Difference]: Start difference. First operand has 133 places, 75 transitions, 391 flow. Second operand 16 states and 875 transitions. [2021-10-21 20:24:21,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 88 transitions, 588 flow [2021-10-21 20:24:21,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 88 transitions, 532 flow, removed 14 selfloop flow, removed 14 redundant places. [2021-10-21 20:24:21,462 INFO L242 Difference]: Finished difference. Result has 133 places, 63 transitions, 231 flow [2021-10-21 20:24:21,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=231, PETRI_PLACES=133, PETRI_TRANSITIONS=63} [2021-10-21 20:24:21,462 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-10-21 20:24:21,463 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 63 transitions, 231 flow [2021-10-21 20:24:21,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:21,463 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] [2021-10-21 20:24:21,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 20:24:21,464 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:21,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1717179428, now seen corresponding path program 14 times [2021-10-21 20:24:21,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:21,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878619580] [2021-10-21 20:24:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:21,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:21,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:21,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878619580] [2021-10-21 20:24:21,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878619580] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:21,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:21,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:21,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395054925] [2021-10-21 20:24:21,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:21,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:21,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:21,617 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:21,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 63 transitions, 231 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:21,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:21,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:21,785 INFO L129 PetriNetUnfolder]: 4/165 cut-off events. [2021-10-21 20:24:21,785 INFO L130 PetriNetUnfolder]: For 277/283 co-relation queries the response was YES. [2021-10-21 20:24:21,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 165 events. 4/165 cut-off events. For 277/283 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 616 event pairs, 2 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 413. Up to 30 conditions per place. [2021-10-21 20:24:21,786 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 25 selfloop transitions, 6 changer transitions 7/79 dead transitions. [2021-10-21 20:24:21,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 79 transitions, 435 flow [2021-10-21 20:24:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-21 20:24:21,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-21 20:24:21,789 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-21 20:24:21,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-21 20:24:21,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:21,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-21 20:24:21,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,793 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,793 INFO L186 Difference]: Start difference. First operand has 133 places, 63 transitions, 231 flow. Second operand 10 states and 554 transitions. [2021-10-21 20:24:21,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 79 transitions, 435 flow [2021-10-21 20:24:21,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 79 transitions, 363 flow, removed 29 selfloop flow, removed 17 redundant places. [2021-10-21 20:24:21,797 INFO L242 Difference]: Finished difference. Result has 104 places, 65 transitions, 235 flow [2021-10-21 20:24:21,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=235, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2021-10-21 20:24:21,797 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 35 predicate places. [2021-10-21 20:24:21,797 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 235 flow [2021-10-21 20:24:21,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,798 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:21,798 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] [2021-10-21 20:24:21,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-21 20:24:21,798 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1692819958, now seen corresponding path program 15 times [2021-10-21 20:24:21,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:21,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287794631] [2021-10-21 20:24:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:21,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:21,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:21,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287794631] [2021-10-21 20:24:21,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287794631] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:21,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:21,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:21,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524703209] [2021-10-21 20:24:21,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:21,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:21,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:21,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:21,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:21,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:21,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:22,126 INFO L129 PetriNetUnfolder]: 3/167 cut-off events. [2021-10-21 20:24:22,126 INFO L130 PetriNetUnfolder]: For 177/183 co-relation queries the response was YES. [2021-10-21 20:24:22,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 167 events. 3/167 cut-off events. For 177/183 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 648 event pairs, 2 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-10-21 20:24:22,129 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 26 selfloop transitions, 6 changer transitions 7/80 dead transitions. [2021-10-21 20:24:22,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 80 transitions, 406 flow [2021-10-21 20:24:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 555 transitions. [2021-10-21 20:24:22,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.74 [2021-10-21 20:24:22,131 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 555 transitions. [2021-10-21 20:24:22,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 555 transitions. [2021-10-21 20:24:22,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:22,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 555 transitions. [2021-10-21 20:24:22,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.5) internal successors, (555), 10 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,135 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,135 INFO L186 Difference]: Start difference. First operand has 104 places, 65 transitions, 235 flow. Second operand 10 states and 555 transitions. [2021-10-21 20:24:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 80 transitions, 406 flow [2021-10-21 20:24:22,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 80 transitions, 381 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-10-21 20:24:22,139 INFO L242 Difference]: Finished difference. Result has 110 places, 66 transitions, 261 flow [2021-10-21 20:24:22,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=261, PETRI_PLACES=110, PETRI_TRANSITIONS=66} [2021-10-21 20:24:22,140 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-10-21 20:24:22,140 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 66 transitions, 261 flow [2021-10-21 20:24:22,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:22,141 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] [2021-10-21 20:24:22,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 20:24:22,141 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:22,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1241301456, now seen corresponding path program 16 times [2021-10-21 20:24:22,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:22,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237721031] [2021-10-21 20:24:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:22,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:22,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:22,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237721031] [2021-10-21 20:24:22,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237721031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:22,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:22,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:22,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361625953] [2021-10-21 20:24:22,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:22,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:22,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:22,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:22,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:22,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 66 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:22,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:22,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:22,477 INFO L129 PetriNetUnfolder]: 2/162 cut-off events. [2021-10-21 20:24:22,477 INFO L130 PetriNetUnfolder]: For 228/236 co-relation queries the response was YES. [2021-10-21 20:24:22,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 162 events. 2/162 cut-off events. For 228/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 611 event pairs, 2 based on Foata normal form. 4/165 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-10-21 20:24:22,478 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 29 selfloop transitions, 7 changer transitions 4/81 dead transitions. [2021-10-21 20:24:22,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 81 transitions, 426 flow [2021-10-21 20:24:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 558 transitions. [2021-10-21 20:24:22,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.744 [2021-10-21 20:24:22,484 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 558 transitions. [2021-10-21 20:24:22,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 558 transitions. [2021-10-21 20:24:22,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:22,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 558 transitions. [2021-10-21 20:24:22,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.8) internal successors, (558), 10 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,489 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,490 INFO L186 Difference]: Start difference. First operand has 110 places, 66 transitions, 261 flow. Second operand 10 states and 558 transitions. [2021-10-21 20:24:22,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 81 transitions, 426 flow [2021-10-21 20:24:22,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 81 transitions, 363 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-10-21 20:24:22,493 INFO L242 Difference]: Finished difference. Result has 112 places, 68 transitions, 277 flow [2021-10-21 20:24:22,494 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=277, PETRI_PLACES=112, PETRI_TRANSITIONS=68} [2021-10-21 20:24:22,494 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 43 predicate places. [2021-10-21 20:24:22,494 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 68 transitions, 277 flow [2021-10-21 20:24:22,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:22,495 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] [2021-10-21 20:24:22,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-21 20:24:22,495 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash 544611928, now seen corresponding path program 17 times [2021-10-21 20:24:22,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:22,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355014838] [2021-10-21 20:24:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:22,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:22,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:22,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355014838] [2021-10-21 20:24:22,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355014838] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:22,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:22,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:22,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625120966] [2021-10-21 20:24:22,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:22,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:22,626 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:22,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 68 transitions, 277 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:22,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:22,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:22,777 INFO L129 PetriNetUnfolder]: 2/152 cut-off events. [2021-10-21 20:24:22,777 INFO L130 PetriNetUnfolder]: For 166/174 co-relation queries the response was YES. [2021-10-21 20:24:22,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 152 events. 2/152 cut-off events. For 166/174 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 534 event pairs, 2 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 365. Up to 25 conditions per place. [2021-10-21 20:24:22,779 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 4 changer transitions 8/77 dead transitions. [2021-10-21 20:24:22,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 77 transitions, 394 flow [2021-10-21 20:24:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-21 20:24:22,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-21 20:24:22,781 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-21 20:24:22,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-21 20:24:22,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:22,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-21 20:24:22,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,785 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,785 INFO L186 Difference]: Start difference. First operand has 112 places, 68 transitions, 277 flow. Second operand 10 states and 554 transitions. [2021-10-21 20:24:22,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 77 transitions, 394 flow [2021-10-21 20:24:22,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 77 transitions, 364 flow, removed 11 selfloop flow, removed 6 redundant places. [2021-10-21 20:24:22,789 INFO L242 Difference]: Finished difference. Result has 116 places, 65 transitions, 240 flow [2021-10-21 20:24:22,790 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=240, PETRI_PLACES=116, PETRI_TRANSITIONS=65} [2021-10-21 20:24:22,790 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 47 predicate places. [2021-10-21 20:24:22,790 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 65 transitions, 240 flow [2021-10-21 20:24:22,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,791 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:22,791 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] [2021-10-21 20:24:22,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 20:24:22,791 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1503460560, now seen corresponding path program 18 times [2021-10-21 20:24:22,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:22,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593866035] [2021-10-21 20:24:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:22,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:22,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:22,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593866035] [2021-10-21 20:24:22,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593866035] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:22,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:22,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:22,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946956191] [2021-10-21 20:24:22,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:22,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:22,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:22,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:22,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 65 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:22,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:22,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:22,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:23,079 INFO L129 PetriNetUnfolder]: 2/125 cut-off events. [2021-10-21 20:24:23,079 INFO L130 PetriNetUnfolder]: For 123/129 co-relation queries the response was YES. [2021-10-21 20:24:23,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 125 events. 2/125 cut-off events. For 123/129 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 2 based on Foata normal form. 3/127 useless extension candidates. Maximal degree in co-relation 293. Up to 20 conditions per place. [2021-10-21 20:24:23,080 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 17 selfloop transitions, 3 changer transitions 10/71 dead transitions. [2021-10-21 20:24:23,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 71 transitions, 336 flow [2021-10-21 20:24:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 548 transitions. [2021-10-21 20:24:23,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7306666666666667 [2021-10-21 20:24:23,083 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 548 transitions. [2021-10-21 20:24:23,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 548 transitions. [2021-10-21 20:24:23,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:23,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 548 transitions. [2021-10-21 20:24:23,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.8) internal successors, (548), 10 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,087 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,087 INFO L186 Difference]: Start difference. First operand has 116 places, 65 transitions, 240 flow. Second operand 10 states and 548 transitions. [2021-10-21 20:24:23,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 71 transitions, 336 flow [2021-10-21 20:24:23,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 71 transitions, 300 flow, removed 11 selfloop flow, removed 13 redundant places. [2021-10-21 20:24:23,090 INFO L242 Difference]: Finished difference. Result has 108 places, 61 transitions, 182 flow [2021-10-21 20:24:23,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=108, PETRI_TRANSITIONS=61} [2021-10-21 20:24:23,091 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-21 20:24:23,091 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 61 transitions, 182 flow [2021-10-21 20:24:23,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,091 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:23,092 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] [2021-10-21 20:24:23,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 20:24:23,092 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:23,093 INFO L82 PathProgramCache]: Analyzing trace with hash -616209836, now seen corresponding path program 19 times [2021-10-21 20:24:23,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:23,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189459745] [2021-10-21 20:24:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:23,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:23,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:23,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189459745] [2021-10-21 20:24:23,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189459745] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:23,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:23,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:23,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130732304] [2021-10-21 20:24:23,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:23,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:23,214 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:23,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 61 transitions, 182 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:23,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:23,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:23,364 INFO L129 PetriNetUnfolder]: 0/114 cut-off events. [2021-10-21 20:24:23,364 INFO L130 PetriNetUnfolder]: For 47/49 co-relation queries the response was YES. [2021-10-21 20:24:23,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 114 events. 0/114 cut-off events. For 47/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-10-21 20:24:23,365 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 14 selfloop transitions, 6 changer transitions 7/68 dead transitions. [2021-10-21 20:24:23,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 68 transitions, 280 flow [2021-10-21 20:24:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 545 transitions. [2021-10-21 20:24:23,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2021-10-21 20:24:23,368 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 545 transitions. [2021-10-21 20:24:23,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 545 transitions. [2021-10-21 20:24:23,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:23,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 545 transitions. [2021-10-21 20:24:23,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.5) internal successors, (545), 10 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,372 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,373 INFO L186 Difference]: Start difference. First operand has 108 places, 61 transitions, 182 flow. Second operand 10 states and 545 transitions. [2021-10-21 20:24:23,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 68 transitions, 280 flow [2021-10-21 20:24:23,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 68 transitions, 249 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-10-21 20:24:23,375 INFO L242 Difference]: Finished difference. Result has 98 places, 61 transitions, 178 flow [2021-10-21 20:24:23,375 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2021-10-21 20:24:23,376 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 29 predicate places. [2021-10-21 20:24:23,376 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 178 flow [2021-10-21 20:24:23,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 20:24:23,377 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] [2021-10-21 20:24:23,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-21 20:24:23,378 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 20:24:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 367647626, now seen corresponding path program 20 times [2021-10-21 20:24:23,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:23,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175199359] [2021-10-21 20:24:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:23,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:23,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:23,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175199359] [2021-10-21 20:24:23,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175199359] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:23,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:23,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:24:23,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763606053] [2021-10-21 20:24:23,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:23,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:23,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:23,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-21 20:24:23,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 20:24:23,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-21 20:24:23,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 20:24:23,666 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2021-10-21 20:24:23,667 INFO L130 PetriNetUnfolder]: For 27/29 co-relation queries the response was YES. [2021-10-21 20:24:23,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 94 events. 0/94 cut-off events. For 27/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-10-21 20:24:23,667 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2021-10-21 20:24:23,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 62 transitions, 244 flow [2021-10-21 20:24:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 20:24:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 541 transitions. [2021-10-21 20:24:23,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7213333333333334 [2021-10-21 20:24:23,669 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 541 transitions. [2021-10-21 20:24:23,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 541 transitions. [2021-10-21 20:24:23,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:24:23,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 541 transitions. [2021-10-21 20:24:23,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.1) internal successors, (541), 10 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,673 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,673 INFO L186 Difference]: Start difference. First operand has 98 places, 61 transitions, 178 flow. Second operand 10 states and 541 transitions. [2021-10-21 20:24:23,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 62 transitions, 244 flow [2021-10-21 20:24:23,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 62 transitions, 228 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-10-21 20:24:23,675 INFO L242 Difference]: Finished difference. Result has 95 places, 0 transitions, 0 flow [2021-10-21 20:24:23,676 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=95, PETRI_TRANSITIONS=0} [2021-10-21 20:24:23,676 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 26 predicate places. [2021-10-21 20:24:23,676 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 0 transitions, 0 flow [2021-10-21 20:24:23,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:23,678 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:24:23,679 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-21 20:24:23,679 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-21 20:24:23,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 20:24:23,687 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-21 20:24:23,687 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:24:23,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:24:23 BasicIcfg [2021-10-21 20:24:23,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:24:23,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:24:23,690 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:24:23,690 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:24:23,691 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:24:10" (3/4) ... [2021-10-21 20:24:23,693 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:24:23,699 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-21 20:24:23,699 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-21 20:24:23,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-21 20:24:23,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:24:23,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:24:23,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:24:23,748 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:24:23,751 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:24:23,752 INFO L168 Benchmark]: Toolchain (without parser) took 14056.53 ms. Allocated memory was 92.3 MB in the beginning and 195.0 MB in the end (delta: 102.8 MB). Free memory was 57.9 MB in the beginning and 124.3 MB in the end (delta: -66.5 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:24:23,753 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 92.3 MB. Free memory was 64.1 MB in the beginning and 64.0 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:24:23,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.71 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 67.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:24:23,754 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.78 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 66.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:24:23,755 INFO L168 Benchmark]: Boogie Preprocessor took 32.16 ms. Allocated memory is still 92.3 MB. Free memory was 66.1 MB in the beginning and 65.2 MB in the end (delta: 893.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:24:23,755 INFO L168 Benchmark]: RCFGBuilder took 427.95 ms. Allocated memory is still 92.3 MB. Free memory was 65.2 MB in the beginning and 54.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:24:23,756 INFO L168 Benchmark]: TraceAbstraction took 13180.41 ms. Allocated memory was 92.3 MB in the beginning and 195.0 MB in the end (delta: 102.8 MB). Free memory was 54.0 MB in the beginning and 126.4 MB in the end (delta: -72.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:24:23,756 INFO L168 Benchmark]: Witness Printer took 60.86 ms. Allocated memory is still 195.0 MB. Free memory was 126.4 MB in the beginning and 124.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:24:23,758 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 92.3 MB. Free memory was 64.1 MB in the beginning and 64.0 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.71 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 67.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.78 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 66.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.16 ms. Allocated memory is still 92.3 MB. Free memory was 66.1 MB in the beginning and 65.2 MB in the end (delta: 893.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 427.95 ms. Allocated memory is still 92.3 MB. Free memory was 65.2 MB in the beginning and 54.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13180.41 ms. Allocated memory was 92.3 MB in the beginning and 195.0 MB in the end (delta: 102.8 MB). Free memory was 54.0 MB in the beginning and 126.4 MB in the end (delta: -72.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. * Witness Printer took 60.86 ms. Allocated memory is still 195.0 MB. Free memory was 126.4 MB in the beginning and 124.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 20.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13036.9ms, OverallIterations: 31, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 7255.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 72.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 686 SDtfs, 1285 SDslu, 3094 SDs, 0 SdLazy, 2345 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1327.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 523 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 4838.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=545occurred in iteration=18, InterpolantAutomatonStates: 341, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 90.5ms SsaConstructionTime, 670.9ms SatisfiabilityAnalysisTime, 4491.1ms InterpolantComputationTime, 1767 NumberOfCodeBlocks, 1767 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1736 ConstructedInterpolants, 0 QuantifiedInterpolants, 10171 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 20:24:23,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434c79a7-8b45-4f61-aaff-4746053a0500/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...