./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa --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 c361ebc03d879240d418527d643e8a7b3c7ac084ceb3e66857b21a687a1c7f90 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:09:54,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:09:54,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:09:54,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:09:54,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:09:54,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:09:54,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:09:54,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:09:54,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:09:54,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:09:54,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:09:54,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:09:54,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:09:54,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:09:54,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:09:54,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:09:54,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:09:54,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:09:54,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:09:54,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:09:54,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:09:54,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:09:54,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:09:54,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:09:54,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:09:54,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:09:54,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:09:54,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:09:54,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:09:54,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:09:54,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:09:54,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:09:54,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:09:54,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:09:54,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:09:54,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:09:54,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:09:54,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:09:54,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:09:54,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:09:54,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:09:54,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:09:54,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:09:54,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:09:54,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:09:54,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:09:54,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:09:54,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:09:54,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:09:54,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:09:54,592 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:09:54,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:09:54,592 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:09:54,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:09:54,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:09:54,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:09:54,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:09:54,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:09:54,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:09:54,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:09:54,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:09:54,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:09:54,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:09:54,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:09:54,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:09:54,594 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:09:54,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:09:54,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:09:54,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:09:54,595 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_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c361ebc03d879240d418527d643e8a7b3c7ac084ceb3e66857b21a687a1c7f90 [2021-12-06 18:09:54,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:09:54,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:09:54,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:09:54,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:09:54,797 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:09:54,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-06 18:09:54,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/data/70de1373a/50d6d33d15fe4452a3023f57032c2be5/FLAG5cec111ea [2021-12-06 18:09:55,209 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:09:55,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-06 18:09:55,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/data/70de1373a/50d6d33d15fe4452a3023f57032c2be5/FLAG5cec111ea [2021-12-06 18:09:55,226 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/data/70de1373a/50d6d33d15fe4452a3023f57032c2be5 [2021-12-06 18:09:55,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:09:55,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:09:55,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:09:55,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:09:55,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:09:55,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a1d2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55, skipping insertion in model container [2021-12-06 18:09:55,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:09:55,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:09:55,386 WARN L230 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_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c[2133,2146] [2021-12-06 18:09:55,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:09:55,394 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:09:55,407 WARN L230 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_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c[2133,2146] [2021-12-06 18:09:55,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:09:55,418 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:09:55,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55 WrapperNode [2021-12-06 18:09:55,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:09:55,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:09:55,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:09:55,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:09:55,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,443 INFO L137 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2021-12-06 18:09:55,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:09:55,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:09:55,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:09:55,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:09:55,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:09:55,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:09:55,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:09:55,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:09:55,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (1/1) ... [2021-12-06 18:09:55,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:09:55,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:09:55,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:09:55,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:09:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:09:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 18:09:55,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 18:09:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 18:09:55,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 18:09:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:09:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:09:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:09:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:09:55,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:09:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:09:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:09:55,530 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 18:09:55,587 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:09:55,588 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:09:55,703 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:09:55,709 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:09:55,709 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 18:09:55,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:09:55 BoogieIcfgContainer [2021-12-06 18:09:55,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:09:55,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:09:55,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:09:55,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:09:55,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:09:55" (1/3) ... [2021-12-06 18:09:55,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15462aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:09:55, skipping insertion in model container [2021-12-06 18:09:55,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:55" (2/3) ... [2021-12-06 18:09:55,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15462aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:09:55, skipping insertion in model container [2021-12-06 18:09:55,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:09:55" (3/3) ... [2021-12-06 18:09:55,717 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-sre-symm.wvr.c [2021-12-06 18:09:55,720 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 18:09:55,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:09:55,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:09:55,721 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 18:09:55,742 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,743 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,744 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,745 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,746 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,747 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,748 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,749 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,751 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,753 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,754 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,754 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,754 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:09:55,756 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 18:09:55,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:09:55,798 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:09:55,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 18:09:55,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 102 transitions, 220 flow [2021-12-06 18:09:55,846 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2021-12-06 18:09:55,846 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 18:09:55,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 7/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-06 18:09:55,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 102 transitions, 220 flow [2021-12-06 18:09:55,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 194 flow [2021-12-06 18:09:55,872 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2021-12-06 18:09:55,872 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 18:09:55,872 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:55,872 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:55,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1122200234, now seen corresponding path program 1 times [2021-12-06 18:09:55,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:55,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911680681] [2021-12-06 18:09:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:55,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:56,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:56,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911680681] [2021-12-06 18:09:56,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911680681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:56,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:56,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:09:56,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983020128] [2021-12-06 18:09:56,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:56,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:09:56,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:09:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:09:56,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 102 [2021-12-06 18:09:56,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:56,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 102 [2021-12-06 18:09:56,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:56,404 INFO L129 PetriNetUnfolder]: 55/294 cut-off events. [2021-12-06 18:09:56,404 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-12-06 18:09:56,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 294 events. 55/294 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1134 event pairs, 11 based on Foata normal form. 9/287 useless extension candidates. Maximal degree in co-relation 265. Up to 44 conditions per place. [2021-12-06 18:09:56,409 INFO L132 encePairwiseOnDemand]: 86/102 looper letters, 52 selfloop transitions, 10 changer transitions 34/155 dead transitions. [2021-12-06 18:09:56,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 541 flow [2021-12-06 18:09:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:09:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 18:09:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1141 transitions. [2021-12-06 18:09:56,428 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7457516339869281 [2021-12-06 18:09:56,428 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1141 transitions. [2021-12-06 18:09:56,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1141 transitions. [2021-12-06 18:09:56,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:56,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1141 transitions. [2021-12-06 18:09:56,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 76.06666666666666) internal successors, (1141), 15 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 102.0) internal successors, (1632), 16 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,447 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 102.0) internal successors, (1632), 16 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,449 INFO L186 Difference]: Start difference. First operand has 91 places, 91 transitions, 194 flow. Second operand 15 states and 1141 transitions. [2021-12-06 18:09:56,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 541 flow [2021-12-06 18:09:56,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 515 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 18:09:56,457 INFO L242 Difference]: Finished difference. Result has 111 places, 93 transitions, 253 flow [2021-12-06 18:09:56,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=253, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2021-12-06 18:09:56,461 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 20 predicate places. [2021-12-06 18:09:56,462 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 253 flow [2021-12-06 18:09:56,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:56,463 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:56,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:09:56,463 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:56,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash 697994717, now seen corresponding path program 1 times [2021-12-06 18:09:56,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:56,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325008828] [2021-12-06 18:09:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:56,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:56,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:56,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325008828] [2021-12-06 18:09:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325008828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:56,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:56,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:09:56,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909418982] [2021-12-06 18:09:56,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:56,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:09:56,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:09:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:09:56,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-06 18:09:56,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:56,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-06 18:09:56,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:56,605 INFO L129 PetriNetUnfolder]: 41/290 cut-off events. [2021-12-06 18:09:56,605 INFO L130 PetriNetUnfolder]: For 107/112 co-relation queries the response was YES. [2021-12-06 18:09:56,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 290 events. 41/290 cut-off events. For 107/112 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1157 event pairs, 13 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 482. Up to 52 conditions per place. [2021-12-06 18:09:56,608 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 18 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2021-12-06 18:09:56,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 308 flow [2021-12-06 18:09:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:09:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 18:09:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-06 18:09:56,609 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-06 18:09:56,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-06 18:09:56,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-06 18:09:56,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:56,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-06 18:09:56,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,612 INFO L186 Difference]: Start difference. First operand has 111 places, 93 transitions, 253 flow. Second operand 3 states and 269 transitions. [2021-12-06 18:09:56,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 308 flow [2021-12-06 18:09:56,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 297 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-06 18:09:56,617 INFO L242 Difference]: Finished difference. Result has 100 places, 95 transitions, 262 flow [2021-12-06 18:09:56,617 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2021-12-06 18:09:56,618 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2021-12-06 18:09:56,618 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 262 flow [2021-12-06 18:09:56,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,619 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:56,619 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:56,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:09:56,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1049557055, now seen corresponding path program 2 times [2021-12-06 18:09:56,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:56,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301283680] [2021-12-06 18:09:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:56,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:56,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:56,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301283680] [2021-12-06 18:09:56,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301283680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:56,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:56,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:09:56,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847328738] [2021-12-06 18:09:56,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:56,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:09:56,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:09:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:09:56,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-06 18:09:56,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:56,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-06 18:09:56,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:56,747 INFO L129 PetriNetUnfolder]: 28/218 cut-off events. [2021-12-06 18:09:56,748 INFO L130 PetriNetUnfolder]: For 59/60 co-relation queries the response was YES. [2021-12-06 18:09:56,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 218 events. 28/218 cut-off events. For 59/60 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 701 event pairs, 16 based on Foata normal form. 3/202 useless extension candidates. Maximal degree in co-relation 313. Up to 46 conditions per place. [2021-12-06 18:09:56,749 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 16 selfloop transitions, 0 changer transitions 13/96 dead transitions. [2021-12-06 18:09:56,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 307 flow [2021-12-06 18:09:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:09:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 18:09:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-06 18:09:56,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-06 18:09:56,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-06 18:09:56,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-06 18:09:56,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:56,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-06 18:09:56,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,754 INFO L186 Difference]: Start difference. First operand has 100 places, 95 transitions, 262 flow. Second operand 3 states and 269 transitions. [2021-12-06 18:09:56,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 307 flow [2021-12-06 18:09:56,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 18:09:56,757 INFO L242 Difference]: Finished difference. Result has 101 places, 83 transitions, 202 flow [2021-12-06 18:09:56,758 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2021-12-06 18:09:56,758 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 10 predicate places. [2021-12-06 18:09:56,759 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 202 flow [2021-12-06 18:09:56,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:56,759 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:56,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:09:56,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1224331634, now seen corresponding path program 1 times [2021-12-06 18:09:56,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800747787] [2021-12-06 18:09:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:56,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:56,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800747787] [2021-12-06 18:09:56,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800747787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:56,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:56,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:09:56,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006881023] [2021-12-06 18:09:56,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:56,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:09:56,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:09:56,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:09:56,907 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:09:56,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 202 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:56,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:56,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:09:56,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:57,175 INFO L129 PetriNetUnfolder]: 96/360 cut-off events. [2021-12-06 18:09:57,175 INFO L130 PetriNetUnfolder]: For 149/150 co-relation queries the response was YES. [2021-12-06 18:09:57,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 360 events. 96/360 cut-off events. For 149/150 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1563 event pairs, 35 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 744. Up to 112 conditions per place. [2021-12-06 18:09:57,178 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 75 selfloop transitions, 5 changer transitions 34/167 dead transitions. [2021-12-06 18:09:57,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 167 transitions, 697 flow [2021-12-06 18:09:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:09:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-06 18:09:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1627 transitions. [2021-12-06 18:09:57,183 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6646241830065359 [2021-12-06 18:09:57,183 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1627 transitions. [2021-12-06 18:09:57,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1627 transitions. [2021-12-06 18:09:57,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:57,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1627 transitions. [2021-12-06 18:09:57,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.79166666666667) internal successors, (1627), 24 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,193 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,193 INFO L186 Difference]: Start difference. First operand has 101 places, 83 transitions, 202 flow. Second operand 24 states and 1627 transitions. [2021-12-06 18:09:57,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 167 transitions, 697 flow [2021-12-06 18:09:57,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 643 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-12-06 18:09:57,198 INFO L242 Difference]: Finished difference. Result has 133 places, 87 transitions, 283 flow [2021-12-06 18:09:57,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=283, PETRI_PLACES=133, PETRI_TRANSITIONS=87} [2021-12-06 18:09:57,199 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 42 predicate places. [2021-12-06 18:09:57,199 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 87 transitions, 283 flow [2021-12-06 18:09:57,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:57,200 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:57,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:09:57,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -608647506, now seen corresponding path program 2 times [2021-12-06 18:09:57,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:57,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301712206] [2021-12-06 18:09:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:57,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:57,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301712206] [2021-12-06 18:09:57,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301712206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:57,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:57,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:09:57,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010657238] [2021-12-06 18:09:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:09:57,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:09:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:09:57,353 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:09:57,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 87 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:57,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:09:57,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:57,698 INFO L129 PetriNetUnfolder]: 136/542 cut-off events. [2021-12-06 18:09:57,699 INFO L130 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2021-12-06 18:09:57,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 542 events. 136/542 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2902 event pairs, 70 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 1773. Up to 193 conditions per place. [2021-12-06 18:09:57,704 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 98 selfloop transitions, 5 changer transitions 32/188 dead transitions. [2021-12-06 18:09:57,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 1218 flow [2021-12-06 18:09:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:09:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-06 18:09:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1624 transitions. [2021-12-06 18:09:57,709 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-06 18:09:57,709 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1624 transitions. [2021-12-06 18:09:57,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1624 transitions. [2021-12-06 18:09:57,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:57,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1624 transitions. [2021-12-06 18:09:57,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.66666666666667) internal successors, (1624), 24 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,719 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,719 INFO L186 Difference]: Start difference. First operand has 133 places, 87 transitions, 283 flow. Second operand 24 states and 1624 transitions. [2021-12-06 18:09:57,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 1218 flow [2021-12-06 18:09:57,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 188 transitions, 1110 flow, removed 51 selfloop flow, removed 11 redundant places. [2021-12-06 18:09:57,729 INFO L242 Difference]: Finished difference. Result has 150 places, 91 transitions, 369 flow [2021-12-06 18:09:57,729 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=369, PETRI_PLACES=150, PETRI_TRANSITIONS=91} [2021-12-06 18:09:57,730 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 59 predicate places. [2021-12-06 18:09:57,730 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 91 transitions, 369 flow [2021-12-06 18:09:57,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,731 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:57,731 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:57,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:09:57,731 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:57,732 INFO L85 PathProgramCache]: Analyzing trace with hash 64807340, now seen corresponding path program 1 times [2021-12-06 18:09:57,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:57,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407348269] [2021-12-06 18:09:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:57,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:57,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407348269] [2021-12-06 18:09:57,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407348269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:57,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:57,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:09:57,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867347807] [2021-12-06 18:09:57,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:57,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:09:57,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:57,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:09:57,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:09:57,778 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-06 18:09:57,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 91 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:57,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-06 18:09:57,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:57,846 INFO L129 PetriNetUnfolder]: 50/385 cut-off events. [2021-12-06 18:09:57,846 INFO L130 PetriNetUnfolder]: For 1727/1776 co-relation queries the response was YES. [2021-12-06 18:09:57,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 385 events. 50/385 cut-off events. For 1727/1776 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1854 event pairs, 38 based on Foata normal form. 12/371 useless extension candidates. Maximal degree in co-relation 1171. Up to 43 conditions per place. [2021-12-06 18:09:57,850 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 18 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2021-12-06 18:09:57,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 100 transitions, 445 flow [2021-12-06 18:09:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:09:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 18:09:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-06 18:09:57,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-06 18:09:57,852 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-06 18:09:57,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-06 18:09:57,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:57,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-06 18:09:57,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,854 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,854 INFO L186 Difference]: Start difference. First operand has 150 places, 91 transitions, 369 flow. Second operand 4 states and 354 transitions. [2021-12-06 18:09:57,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 100 transitions, 445 flow [2021-12-06 18:09:57,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 100 transitions, 418 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-06 18:09:57,860 INFO L242 Difference]: Finished difference. Result has 126 places, 93 transitions, 376 flow [2021-12-06 18:09:57,861 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=126, PETRI_TRANSITIONS=93} [2021-12-06 18:09:57,861 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 35 predicate places. [2021-12-06 18:09:57,861 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 376 flow [2021-12-06 18:09:57,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,862 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:57,862 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:57,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:09:57,862 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:57,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1234378536, now seen corresponding path program 3 times [2021-12-06 18:09:57,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419860212] [2021-12-06 18:09:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:57,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:57,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419860212] [2021-12-06 18:09:57,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419860212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:57,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:57,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:09:57,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452552254] [2021-12-06 18:09:57,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:57,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:09:57,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:09:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:09:57,958 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:09:57,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 93 transitions, 376 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:57,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:57,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:09:57,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:58,231 INFO L129 PetriNetUnfolder]: 148/591 cut-off events. [2021-12-06 18:09:58,231 INFO L130 PetriNetUnfolder]: For 2119/2120 co-relation queries the response was YES. [2021-12-06 18:09:58,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 591 events. 148/591 cut-off events. For 2119/2120 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3299 event pairs, 90 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 2235. Up to 270 conditions per place. [2021-12-06 18:09:58,237 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 12 changer transitions 25/150 dead transitions. [2021-12-06 18:09:58,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 150 transitions, 1101 flow [2021-12-06 18:09:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:09:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-06 18:09:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1348 transitions. [2021-12-06 18:09:58,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6607843137254902 [2021-12-06 18:09:58,241 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1348 transitions. [2021-12-06 18:09:58,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1348 transitions. [2021-12-06 18:09:58,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:58,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1348 transitions. [2021-12-06 18:09:58,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.4) internal successors, (1348), 20 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,248 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,249 INFO L186 Difference]: Start difference. First operand has 126 places, 93 transitions, 376 flow. Second operand 20 states and 1348 transitions. [2021-12-06 18:09:58,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 150 transitions, 1101 flow [2021-12-06 18:09:58,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 150 transitions, 1095 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 18:09:58,258 INFO L242 Difference]: Finished difference. Result has 160 places, 103 transitions, 559 flow [2021-12-06 18:09:58,258 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=559, PETRI_PLACES=160, PETRI_TRANSITIONS=103} [2021-12-06 18:09:58,258 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2021-12-06 18:09:58,259 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 103 transitions, 559 flow [2021-12-06 18:09:58,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:58,259 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:58,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:09:58,260 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -969644156, now seen corresponding path program 1 times [2021-12-06 18:09:58,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:58,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949059605] [2021-12-06 18:09:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:58,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:58,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949059605] [2021-12-06 18:09:58,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949059605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:58,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:58,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:09:58,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054221364] [2021-12-06 18:09:58,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:58,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:09:58,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:58,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:09:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:09:58,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-06 18:09:58,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 103 transitions, 559 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:58,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-06 18:09:58,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:58,377 INFO L129 PetriNetUnfolder]: 61/422 cut-off events. [2021-12-06 18:09:58,377 INFO L130 PetriNetUnfolder]: For 2187/2233 co-relation queries the response was YES. [2021-12-06 18:09:58,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 422 events. 61/422 cut-off events. For 2187/2233 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2222 event pairs, 47 based on Foata normal form. 14/415 useless extension candidates. Maximal degree in co-relation 1455. Up to 50 conditions per place. [2021-12-06 18:09:58,382 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2021-12-06 18:09:58,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 112 transitions, 644 flow [2021-12-06 18:09:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:09:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 18:09:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-06 18:09:58,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-06 18:09:58,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-06 18:09:58,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-06 18:09:58,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:58,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-06 18:09:58,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,386 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,386 INFO L186 Difference]: Start difference. First operand has 160 places, 103 transitions, 559 flow. Second operand 4 states and 354 transitions. [2021-12-06 18:09:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 112 transitions, 644 flow [2021-12-06 18:09:58,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 112 transitions, 579 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-12-06 18:09:58,396 INFO L242 Difference]: Finished difference. Result has 143 places, 105 transitions, 520 flow [2021-12-06 18:09:58,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2021-12-06 18:09:58,397 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 52 predicate places. [2021-12-06 18:09:58,397 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 520 flow [2021-12-06 18:09:58,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:58,397 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:58,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:09:58,398 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1504756170, now seen corresponding path program 2 times [2021-12-06 18:09:58,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:58,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922910358] [2021-12-06 18:09:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:58,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:58,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:58,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922910358] [2021-12-06 18:09:58,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922910358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:58,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:58,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:09:58,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668546776] [2021-12-06 18:09:58,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:58,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:09:58,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:09:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:09:58,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-06 18:09:58,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:58,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-06 18:09:58,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:58,521 INFO L129 PetriNetUnfolder]: 47/369 cut-off events. [2021-12-06 18:09:58,521 INFO L130 PetriNetUnfolder]: For 1465/1492 co-relation queries the response was YES. [2021-12-06 18:09:58,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 369 events. 47/369 cut-off events. For 1465/1492 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1807 event pairs, 31 based on Foata normal form. 12/364 useless extension candidates. Maximal degree in co-relation 1179. Up to 42 conditions per place. [2021-12-06 18:09:58,526 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 6 changer transitions 0/114 dead transitions. [2021-12-06 18:09:58,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 114 transitions, 608 flow [2021-12-06 18:09:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:09:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 18:09:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2021-12-06 18:09:58,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8588235294117647 [2021-12-06 18:09:58,529 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 438 transitions. [2021-12-06 18:09:58,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 438 transitions. [2021-12-06 18:09:58,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:58,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 438 transitions. [2021-12-06 18:09:58,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,532 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,532 INFO L186 Difference]: Start difference. First operand has 143 places, 105 transitions, 520 flow. Second operand 5 states and 438 transitions. [2021-12-06 18:09:58,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 114 transitions, 608 flow [2021-12-06 18:09:58,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 114 transitions, 592 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-12-06 18:09:58,544 INFO L242 Difference]: Finished difference. Result has 148 places, 107 transitions, 536 flow [2021-12-06 18:09:58,545 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=148, PETRI_TRANSITIONS=107} [2021-12-06 18:09:58,545 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 57 predicate places. [2021-12-06 18:09:58,546 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 107 transitions, 536 flow [2021-12-06 18:09:58,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:58,546 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:58,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:09:58,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:58,547 INFO L85 PathProgramCache]: Analyzing trace with hash -209784758, now seen corresponding path program 1 times [2021-12-06 18:09:58,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:58,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905321154] [2021-12-06 18:09:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:58,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:58,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:58,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905321154] [2021-12-06 18:09:58,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905321154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:58,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:58,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:09:58,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295862002] [2021-12-06 18:09:58,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:58,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:09:58,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:09:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:09:58,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:09:58,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 107 transitions, 536 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:58,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:58,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:09:58,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:59,003 INFO L129 PetriNetUnfolder]: 121/525 cut-off events. [2021-12-06 18:09:59,003 INFO L130 PetriNetUnfolder]: For 2500/2506 co-relation queries the response was YES. [2021-12-06 18:09:59,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 525 events. 121/525 cut-off events. For 2500/2506 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2835 event pairs, 66 based on Foata normal form. 1/518 useless extension candidates. Maximal degree in co-relation 2089. Up to 228 conditions per place. [2021-12-06 18:09:59,011 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 81 selfloop transitions, 5 changer transitions 41/186 dead transitions. [2021-12-06 18:09:59,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 186 transitions, 1365 flow [2021-12-06 18:09:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:09:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-06 18:09:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1626 transitions. [2021-12-06 18:09:59,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-06 18:09:59,015 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1626 transitions. [2021-12-06 18:09:59,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1626 transitions. [2021-12-06 18:09:59,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:59,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1626 transitions. [2021-12-06 18:09:59,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.75) internal successors, (1626), 24 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,025 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,025 INFO L186 Difference]: Start difference. First operand has 148 places, 107 transitions, 536 flow. Second operand 24 states and 1626 transitions. [2021-12-06 18:09:59,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 186 transitions, 1365 flow [2021-12-06 18:09:59,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 186 transitions, 1353 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-06 18:09:59,042 INFO L242 Difference]: Finished difference. Result has 187 places, 107 transitions, 575 flow [2021-12-06 18:09:59,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=575, PETRI_PLACES=187, PETRI_TRANSITIONS=107} [2021-12-06 18:09:59,043 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 96 predicate places. [2021-12-06 18:09:59,043 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 107 transitions, 575 flow [2021-12-06 18:09:59,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,044 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:59,044 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:59,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:09:59,044 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:59,045 INFO L85 PathProgramCache]: Analyzing trace with hash -327031736, now seen corresponding path program 2 times [2021-12-06 18:09:59,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:59,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74915243] [2021-12-06 18:09:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:59,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:59,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74915243] [2021-12-06 18:09:59,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74915243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:59,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:59,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:09:59,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085002581] [2021-12-06 18:09:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:59,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:09:59,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:09:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:09:59,102 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-06 18:09:59,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 107 transitions, 575 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:59,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-06 18:09:59,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:59,166 INFO L129 PetriNetUnfolder]: 36/306 cut-off events. [2021-12-06 18:09:59,166 INFO L130 PetriNetUnfolder]: For 1487/1494 co-relation queries the response was YES. [2021-12-06 18:09:59,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 306 events. 36/306 cut-off events. For 1487/1494 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1391 event pairs, 22 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1069. Up to 34 conditions per place. [2021-12-06 18:09:59,170 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 21 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2021-12-06 18:09:59,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 114 transitions, 661 flow [2021-12-06 18:09:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:09:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 18:09:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2021-12-06 18:09:59,171 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8549019607843137 [2021-12-06 18:09:59,171 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2021-12-06 18:09:59,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2021-12-06 18:09:59,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:59,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2021-12-06 18:09:59,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,173 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,173 INFO L186 Difference]: Start difference. First operand has 187 places, 107 transitions, 575 flow. Second operand 5 states and 436 transitions. [2021-12-06 18:09:59,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 114 transitions, 661 flow [2021-12-06 18:09:59,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 114 transitions, 585 flow, removed 25 selfloop flow, removed 22 redundant places. [2021-12-06 18:09:59,182 INFO L242 Difference]: Finished difference. Result has 154 places, 109 transitions, 541 flow [2021-12-06 18:09:59,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=541, PETRI_PLACES=154, PETRI_TRANSITIONS=109} [2021-12-06 18:09:59,183 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 63 predicate places. [2021-12-06 18:09:59,183 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 109 transitions, 541 flow [2021-12-06 18:09:59,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:59,183 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:59,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:09:59,184 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1373768200, now seen corresponding path program 2 times [2021-12-06 18:09:59,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:59,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693410496] [2021-12-06 18:09:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:59,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:59,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693410496] [2021-12-06 18:09:59,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693410496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:59,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:59,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:09:59,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362599066] [2021-12-06 18:09:59,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:59,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:09:59,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:09:59,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:09:59,290 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:09:59,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 109 transitions, 541 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:59,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:09:59,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:59,560 INFO L129 PetriNetUnfolder]: 101/463 cut-off events. [2021-12-06 18:09:59,561 INFO L130 PetriNetUnfolder]: For 1777/1784 co-relation queries the response was YES. [2021-12-06 18:09:59,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 463 events. 101/463 cut-off events. For 1777/1784 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2374 event pairs, 45 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 1738. Up to 187 conditions per place. [2021-12-06 18:09:59,567 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 65 selfloop transitions, 12 changer transitions 32/170 dead transitions. [2021-12-06 18:09:59,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 170 transitions, 1333 flow [2021-12-06 18:09:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:09:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-06 18:09:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1482 transitions. [2021-12-06 18:09:59,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660427807486631 [2021-12-06 18:09:59,569 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1482 transitions. [2021-12-06 18:09:59,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1482 transitions. [2021-12-06 18:09:59,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:59,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1482 transitions. [2021-12-06 18:09:59,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.36363636363636) internal successors, (1482), 22 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,575 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,575 INFO L186 Difference]: Start difference. First operand has 154 places, 109 transitions, 541 flow. Second operand 22 states and 1482 transitions. [2021-12-06 18:09:59,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 170 transitions, 1333 flow [2021-12-06 18:09:59,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 170 transitions, 1201 flow, removed 62 selfloop flow, removed 8 redundant places. [2021-12-06 18:09:59,591 INFO L242 Difference]: Finished difference. Result has 181 places, 119 transitions, 677 flow [2021-12-06 18:09:59,592 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=677, PETRI_PLACES=181, PETRI_TRANSITIONS=119} [2021-12-06 18:09:59,592 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 90 predicate places. [2021-12-06 18:09:59,592 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 119 transitions, 677 flow [2021-12-06 18:09:59,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,593 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:59,593 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:59,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:09:59,593 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -725426182, now seen corresponding path program 3 times [2021-12-06 18:09:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:59,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663639571] [2021-12-06 18:09:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:59,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:59,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663639571] [2021-12-06 18:09:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663639571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:59,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:59,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:09:59,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496085755] [2021-12-06 18:09:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:59,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:09:59,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:09:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:09:59,683 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:09:59,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 119 transitions, 677 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:09:59,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:09:59,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:09:59,922 INFO L129 PetriNetUnfolder]: 117/531 cut-off events. [2021-12-06 18:09:59,922 INFO L130 PetriNetUnfolder]: For 2626/2636 co-relation queries the response was YES. [2021-12-06 18:09:59,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 531 events. 117/531 cut-off events. For 2626/2636 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2852 event pairs, 64 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 2180. Up to 190 conditions per place. [2021-12-06 18:09:59,928 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 67 selfloop transitions, 19 changer transitions 32/179 dead transitions. [2021-12-06 18:09:59,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 179 transitions, 1550 flow [2021-12-06 18:09:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:09:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-06 18:09:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1355 transitions. [2021-12-06 18:09:59,930 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-06 18:09:59,930 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1355 transitions. [2021-12-06 18:09:59,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1355 transitions. [2021-12-06 18:09:59,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:09:59,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1355 transitions. [2021-12-06 18:09:59,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.75) internal successors, (1355), 20 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,943 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,943 INFO L186 Difference]: Start difference. First operand has 181 places, 119 transitions, 677 flow. Second operand 20 states and 1355 transitions. [2021-12-06 18:09:59,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 179 transitions, 1550 flow [2021-12-06 18:09:59,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 1308 flow, removed 121 selfloop flow, removed 11 redundant places. [2021-12-06 18:09:59,955 INFO L242 Difference]: Finished difference. Result has 192 places, 129 transitions, 775 flow [2021-12-06 18:09:59,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=775, PETRI_PLACES=192, PETRI_TRANSITIONS=129} [2021-12-06 18:09:59,956 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 101 predicate places. [2021-12-06 18:09:59,956 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 129 transitions, 775 flow [2021-12-06 18:09:59,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:09:59,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:09:59,956 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:09:59,957 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:09:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1317621250, now seen corresponding path program 4 times [2021-12-06 18:09:59,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:59,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14780395] [2021-12-06 18:09:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:59,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:00,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14780395] [2021-12-06 18:10:00,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14780395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:00,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:00,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:00,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125718999] [2021-12-06 18:10:00,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:00,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:00,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:00,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:00,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 129 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:00,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:00,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:00,317 INFO L129 PetriNetUnfolder]: 114/502 cut-off events. [2021-12-06 18:10:00,318 INFO L130 PetriNetUnfolder]: For 3045/3058 co-relation queries the response was YES. [2021-12-06 18:10:00,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2298 conditions, 502 events. 114/502 cut-off events. For 3045/3058 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2702 event pairs, 41 based on Foata normal form. 1/494 useless extension candidates. Maximal degree in co-relation 2236. Up to 151 conditions per place. [2021-12-06 18:10:00,323 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 102 selfloop transitions, 17 changer transitions 45/225 dead transitions. [2021-12-06 18:10:00,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 225 transitions, 2048 flow [2021-12-06 18:10:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:10:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-06 18:10:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1623 transitions. [2021-12-06 18:10:00,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6629901960784313 [2021-12-06 18:10:00,325 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1623 transitions. [2021-12-06 18:10:00,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1623 transitions. [2021-12-06 18:10:00,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:00,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1623 transitions. [2021-12-06 18:10:00,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.625) internal successors, (1623), 24 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,331 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,331 INFO L186 Difference]: Start difference. First operand has 192 places, 129 transitions, 775 flow. Second operand 24 states and 1623 transitions. [2021-12-06 18:10:00,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 225 transitions, 2048 flow [2021-12-06 18:10:00,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 225 transitions, 1793 flow, removed 118 selfloop flow, removed 14 redundant places. [2021-12-06 18:10:00,345 INFO L242 Difference]: Finished difference. Result has 207 places, 129 transitions, 800 flow [2021-12-06 18:10:00,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=800, PETRI_PLACES=207, PETRI_TRANSITIONS=129} [2021-12-06 18:10:00,346 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 116 predicate places. [2021-12-06 18:10:00,346 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 129 transitions, 800 flow [2021-12-06 18:10:00,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:00,346 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:00,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:10:00,346 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1291743776, now seen corresponding path program 5 times [2021-12-06 18:10:00,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:00,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115441520] [2021-12-06 18:10:00,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:00,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:00,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115441520] [2021-12-06 18:10:00,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115441520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:00,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:00,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:00,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034463217] [2021-12-06 18:10:00,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:00,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:00,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:00,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:00,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:00,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 129 transitions, 800 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:00,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:00,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:00,674 INFO L129 PetriNetUnfolder]: 107/494 cut-off events. [2021-12-06 18:10:00,674 INFO L130 PetriNetUnfolder]: For 2398/2412 co-relation queries the response was YES. [2021-12-06 18:10:00,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2161 conditions, 494 events. 107/494 cut-off events. For 2398/2412 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2654 event pairs, 49 based on Foata normal form. 3/489 useless extension candidates. Maximal degree in co-relation 2094. Up to 207 conditions per place. [2021-12-06 18:10:00,680 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 66 selfloop transitions, 21 changer transitions 25/173 dead transitions. [2021-12-06 18:10:00,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 173 transitions, 1468 flow [2021-12-06 18:10:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1218 transitions. [2021-12-06 18:10:00,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-06 18:10:00,682 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1218 transitions. [2021-12-06 18:10:00,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1218 transitions. [2021-12-06 18:10:00,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:00,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1218 transitions. [2021-12-06 18:10:00,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.66666666666667) internal successors, (1218), 18 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,689 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,690 INFO L186 Difference]: Start difference. First operand has 207 places, 129 transitions, 800 flow. Second operand 18 states and 1218 transitions. [2021-12-06 18:10:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 173 transitions, 1468 flow [2021-12-06 18:10:00,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 173 transitions, 1301 flow, removed 40 selfloop flow, removed 22 redundant places. [2021-12-06 18:10:00,702 INFO L242 Difference]: Finished difference. Result has 193 places, 139 transitions, 908 flow [2021-12-06 18:10:00,703 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=908, PETRI_PLACES=193, PETRI_TRANSITIONS=139} [2021-12-06 18:10:00,703 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2021-12-06 18:10:00,703 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 139 transitions, 908 flow [2021-12-06 18:10:00,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:00,704 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:00,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:10:00,705 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 910084234, now seen corresponding path program 6 times [2021-12-06 18:10:00,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:00,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584150346] [2021-12-06 18:10:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:00,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:00,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:00,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584150346] [2021-12-06 18:10:00,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584150346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:00,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:00,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:00,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733310732] [2021-12-06 18:10:00,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:00,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:00,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:00,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:00,795 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:00,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 139 transitions, 908 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:00,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:00,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:00,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:01,049 INFO L129 PetriNetUnfolder]: 106/519 cut-off events. [2021-12-06 18:10:01,050 INFO L130 PetriNetUnfolder]: For 2167/2180 co-relation queries the response was YES. [2021-12-06 18:10:01,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2113 conditions, 519 events. 106/519 cut-off events. For 2167/2180 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2838 event pairs, 45 based on Foata normal form. 1/512 useless extension candidates. Maximal degree in co-relation 2055. Up to 197 conditions per place. [2021-12-06 18:10:01,057 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 82 selfloop transitions, 20 changer transitions 32/195 dead transitions. [2021-12-06 18:10:01,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 195 transitions, 1758 flow [2021-12-06 18:10:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:10:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-06 18:10:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1421 transitions. [2021-12-06 18:10:01,060 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-06 18:10:01,060 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1421 transitions. [2021-12-06 18:10:01,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1421 transitions. [2021-12-06 18:10:01,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:01,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1421 transitions. [2021-12-06 18:10:01,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.66666666666667) internal successors, (1421), 21 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,075 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,075 INFO L186 Difference]: Start difference. First operand has 193 places, 139 transitions, 908 flow. Second operand 21 states and 1421 transitions. [2021-12-06 18:10:01,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 195 transitions, 1758 flow [2021-12-06 18:10:01,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 195 transitions, 1622 flow, removed 68 selfloop flow, removed 4 redundant places. [2021-12-06 18:10:01,090 INFO L242 Difference]: Finished difference. Result has 217 places, 147 transitions, 1028 flow [2021-12-06 18:10:01,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1028, PETRI_PLACES=217, PETRI_TRANSITIONS=147} [2021-12-06 18:10:01,091 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 126 predicate places. [2021-12-06 18:10:01,091 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 147 transitions, 1028 flow [2021-12-06 18:10:01,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,092 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:01,092 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:10:01,092 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash -31507484, now seen corresponding path program 7 times [2021-12-06 18:10:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:01,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629314722] [2021-12-06 18:10:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:01,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:01,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629314722] [2021-12-06 18:10:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629314722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:01,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:01,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:01,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188438056] [2021-12-06 18:10:01,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:01,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:01,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:01,173 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:01,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 147 transitions, 1028 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:01,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:01,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:01,397 INFO L129 PetriNetUnfolder]: 101/509 cut-off events. [2021-12-06 18:10:01,398 INFO L130 PetriNetUnfolder]: For 2854/2873 co-relation queries the response was YES. [2021-12-06 18:10:01,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2220 conditions, 509 events. 101/509 cut-off events. For 2854/2873 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2832 event pairs, 47 based on Foata normal form. 1/501 useless extension candidates. Maximal degree in co-relation 2148. Up to 210 conditions per place. [2021-12-06 18:10:01,403 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 76 selfloop transitions, 26 changer transitions 39/202 dead transitions. [2021-12-06 18:10:01,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 202 transitions, 1984 flow [2021-12-06 18:10:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:10:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-06 18:10:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2021-12-06 18:10:01,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6622549019607843 [2021-12-06 18:10:01,405 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2021-12-06 18:10:01,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2021-12-06 18:10:01,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:01,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2021-12-06 18:10:01,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.55) internal successors, (1351), 20 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,409 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,409 INFO L186 Difference]: Start difference. First operand has 217 places, 147 transitions, 1028 flow. Second operand 20 states and 1351 transitions. [2021-12-06 18:10:01,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 202 transitions, 1984 flow [2021-12-06 18:10:01,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 202 transitions, 1824 flow, removed 74 selfloop flow, removed 12 redundant places. [2021-12-06 18:10:01,424 INFO L242 Difference]: Finished difference. Result has 226 places, 153 transitions, 1178 flow [2021-12-06 18:10:01,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1178, PETRI_PLACES=226, PETRI_TRANSITIONS=153} [2021-12-06 18:10:01,424 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 135 predicate places. [2021-12-06 18:10:01,425 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 153 transitions, 1178 flow [2021-12-06 18:10:01,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:01,425 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:01,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:10:01,425 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash 297255832, now seen corresponding path program 8 times [2021-12-06 18:10:01,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:01,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134897422] [2021-12-06 18:10:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:01,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:01,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:01,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134897422] [2021-12-06 18:10:01,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134897422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:01,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:01,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:01,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614332157] [2021-12-06 18:10:01,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:01,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:01,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:01,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:01,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 153 transitions, 1178 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:01,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:01,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:01,723 INFO L129 PetriNetUnfolder]: 90/459 cut-off events. [2021-12-06 18:10:01,723 INFO L130 PetriNetUnfolder]: For 2591/2610 co-relation queries the response was YES. [2021-12-06 18:10:01,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 459 events. 90/459 cut-off events. For 2591/2610 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2409 event pairs, 45 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 1936. Up to 196 conditions per place. [2021-12-06 18:10:01,727 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 69 selfloop transitions, 14 changer transitions 34/178 dead transitions. [2021-12-06 18:10:01,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 178 transitions, 1671 flow [2021-12-06 18:10:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:10:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 18:10:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1085 transitions. [2021-12-06 18:10:01,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.664828431372549 [2021-12-06 18:10:01,729 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1085 transitions. [2021-12-06 18:10:01,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1085 transitions. [2021-12-06 18:10:01,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:01,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1085 transitions. [2021-12-06 18:10:01,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.8125) internal successors, (1085), 16 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,732 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,732 INFO L186 Difference]: Start difference. First operand has 226 places, 153 transitions, 1178 flow. Second operand 16 states and 1085 transitions. [2021-12-06 18:10:01,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 178 transitions, 1671 flow [2021-12-06 18:10:01,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 178 transitions, 1525 flow, removed 49 selfloop flow, removed 16 redundant places. [2021-12-06 18:10:01,745 INFO L242 Difference]: Finished difference. Result has 218 places, 137 transitions, 910 flow [2021-12-06 18:10:01,745 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=910, PETRI_PLACES=218, PETRI_TRANSITIONS=137} [2021-12-06 18:10:01,746 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 127 predicate places. [2021-12-06 18:10:01,746 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 137 transitions, 910 flow [2021-12-06 18:10:01,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:01,746 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:01,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:10:01,746 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -940619772, now seen corresponding path program 9 times [2021-12-06 18:10:01,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:01,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530817277] [2021-12-06 18:10:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:01,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:01,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:01,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530817277] [2021-12-06 18:10:01,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530817277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:01,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:01,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:01,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971343572] [2021-12-06 18:10:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:01,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:01,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:01,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:01,824 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:01,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 137 transitions, 910 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:01,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:01,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:01,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:02,074 INFO L129 PetriNetUnfolder]: 93/463 cut-off events. [2021-12-06 18:10:02,074 INFO L130 PetriNetUnfolder]: For 2030/2042 co-relation queries the response was YES. [2021-12-06 18:10:02,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 463 events. 93/463 cut-off events. For 2030/2042 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2424 event pairs, 49 based on Foata normal form. 1/455 useless extension candidates. Maximal degree in co-relation 1887. Up to 196 conditions per place. [2021-12-06 18:10:02,079 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 67 selfloop transitions, 23 changer transitions 25/176 dead transitions. [2021-12-06 18:10:02,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 176 transitions, 1558 flow [2021-12-06 18:10:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1219 transitions. [2021-12-06 18:10:02,081 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6639433551198257 [2021-12-06 18:10:02,081 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1219 transitions. [2021-12-06 18:10:02,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1219 transitions. [2021-12-06 18:10:02,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:02,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1219 transitions. [2021-12-06 18:10:02,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.72222222222223) internal successors, (1219), 18 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,084 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,084 INFO L186 Difference]: Start difference. First operand has 218 places, 137 transitions, 910 flow. Second operand 18 states and 1219 transitions. [2021-12-06 18:10:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 176 transitions, 1558 flow [2021-12-06 18:10:02,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 176 transitions, 1401 flow, removed 30 selfloop flow, removed 16 redundant places. [2021-12-06 18:10:02,094 INFO L242 Difference]: Finished difference. Result has 207 places, 146 transitions, 1022 flow [2021-12-06 18:10:02,095 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1022, PETRI_PLACES=207, PETRI_TRANSITIONS=146} [2021-12-06 18:10:02,095 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 116 predicate places. [2021-12-06 18:10:02,095 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 146 transitions, 1022 flow [2021-12-06 18:10:02,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:02,095 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:02,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:10:02,096 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash -97554064, now seen corresponding path program 10 times [2021-12-06 18:10:02,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:02,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105311822] [2021-12-06 18:10:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:02,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:02,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:02,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105311822] [2021-12-06 18:10:02,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105311822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:02,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:02,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:02,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188882201] [2021-12-06 18:10:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:02,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:02,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:02,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:02,175 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:02,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 146 transitions, 1022 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:02,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:02,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:02,367 INFO L129 PetriNetUnfolder]: 90/456 cut-off events. [2021-12-06 18:10:02,367 INFO L130 PetriNetUnfolder]: For 1635/1652 co-relation queries the response was YES. [2021-12-06 18:10:02,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 456 events. 90/456 cut-off events. For 1635/1652 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2380 event pairs, 46 based on Foata normal form. 3/450 useless extension candidates. Maximal degree in co-relation 1792. Up to 196 conditions per place. [2021-12-06 18:10:02,371 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 68 selfloop transitions, 24 changer transitions 26/179 dead transitions. [2021-12-06 18:10:02,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 179 transitions, 1586 flow [2021-12-06 18:10:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1155 transitions. [2021-12-06 18:10:02,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6660899653979239 [2021-12-06 18:10:02,373 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1155 transitions. [2021-12-06 18:10:02,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1155 transitions. [2021-12-06 18:10:02,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:02,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1155 transitions. [2021-12-06 18:10:02,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.94117647058823) internal successors, (1155), 17 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,376 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,376 INFO L186 Difference]: Start difference. First operand has 207 places, 146 transitions, 1022 flow. Second operand 17 states and 1155 transitions. [2021-12-06 18:10:02,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 179 transitions, 1586 flow [2021-12-06 18:10:02,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 179 transitions, 1529 flow, removed 23 selfloop flow, removed 5 redundant places. [2021-12-06 18:10:02,387 INFO L242 Difference]: Finished difference. Result has 218 places, 149 transitions, 1105 flow [2021-12-06 18:10:02,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1105, PETRI_PLACES=218, PETRI_TRANSITIONS=149} [2021-12-06 18:10:02,387 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 127 predicate places. [2021-12-06 18:10:02,387 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 149 transitions, 1105 flow [2021-12-06 18:10:02,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:02,388 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:02,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:10:02,388 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1696586704, now seen corresponding path program 11 times [2021-12-06 18:10:02,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:02,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800091977] [2021-12-06 18:10:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:02,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:02,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:02,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800091977] [2021-12-06 18:10:02,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800091977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:02,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:02,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:02,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176961708] [2021-12-06 18:10:02,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:02,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:02,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:02,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:02,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 149 transitions, 1105 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:02,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:02,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:02,683 INFO L129 PetriNetUnfolder]: 87/458 cut-off events. [2021-12-06 18:10:02,683 INFO L130 PetriNetUnfolder]: For 1732/1744 co-relation queries the response was YES. [2021-12-06 18:10:02,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1855 conditions, 458 events. 87/458 cut-off events. For 1732/1744 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2428 event pairs, 49 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1785. Up to 196 conditions per place. [2021-12-06 18:10:02,688 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 67 selfloop transitions, 15 changer transitions 33/176 dead transitions. [2021-12-06 18:10:02,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 176 transitions, 1576 flow [2021-12-06 18:10:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1218 transitions. [2021-12-06 18:10:02,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-06 18:10:02,689 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1218 transitions. [2021-12-06 18:10:02,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1218 transitions. [2021-12-06 18:10:02,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:02,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1218 transitions. [2021-12-06 18:10:02,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.66666666666667) internal successors, (1218), 18 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,693 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,693 INFO L186 Difference]: Start difference. First operand has 218 places, 149 transitions, 1105 flow. Second operand 18 states and 1218 transitions. [2021-12-06 18:10:02,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 176 transitions, 1576 flow [2021-12-06 18:10:02,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 176 transitions, 1477 flow, removed 28 selfloop flow, removed 7 redundant places. [2021-12-06 18:10:02,705 INFO L242 Difference]: Finished difference. Result has 228 places, 140 transitions, 959 flow [2021-12-06 18:10:02,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=959, PETRI_PLACES=228, PETRI_TRANSITIONS=140} [2021-12-06 18:10:02,706 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 137 predicate places. [2021-12-06 18:10:02,706 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 140 transitions, 959 flow [2021-12-06 18:10:02,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:02,706 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:02,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:10:02,706 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash -802467334, now seen corresponding path program 12 times [2021-12-06 18:10:02,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397644465] [2021-12-06 18:10:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:02,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:02,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397644465] [2021-12-06 18:10:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397644465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:02,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:02,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:02,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279922764] [2021-12-06 18:10:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:02,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:02,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:02,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:02,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 140 transitions, 959 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:02,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:02,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:02,975 INFO L129 PetriNetUnfolder]: 77/415 cut-off events. [2021-12-06 18:10:02,975 INFO L130 PetriNetUnfolder]: For 1561/1573 co-relation queries the response was YES. [2021-12-06 18:10:02,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1631 conditions, 415 events. 77/415 cut-off events. For 1561/1573 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2063 event pairs, 45 based on Foata normal form. 1/408 useless extension candidates. Maximal degree in co-relation 1558. Up to 183 conditions per place. [2021-12-06 18:10:02,981 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 3 changer transitions 38/160 dead transitions. [2021-12-06 18:10:02,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 160 transitions, 1287 flow [2021-12-06 18:10:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1146 transitions. [2021-12-06 18:10:02,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6608996539792388 [2021-12-06 18:10:02,983 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1146 transitions. [2021-12-06 18:10:02,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1146 transitions. [2021-12-06 18:10:02,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:02,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1146 transitions. [2021-12-06 18:10:02,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.41176470588235) internal successors, (1146), 17 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,986 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,986 INFO L186 Difference]: Start difference. First operand has 228 places, 140 transitions, 959 flow. Second operand 17 states and 1146 transitions. [2021-12-06 18:10:02,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 160 transitions, 1287 flow [2021-12-06 18:10:02,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 160 transitions, 1166 flow, removed 29 selfloop flow, removed 21 redundant places. [2021-12-06 18:10:02,995 INFO L242 Difference]: Finished difference. Result has 211 places, 120 transitions, 644 flow [2021-12-06 18:10:02,996 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=644, PETRI_PLACES=211, PETRI_TRANSITIONS=120} [2021-12-06 18:10:02,996 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 120 predicate places. [2021-12-06 18:10:02,996 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 120 transitions, 644 flow [2021-12-06 18:10:02,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:02,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:02,997 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:02,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:10:02,997 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1281056072, now seen corresponding path program 13 times [2021-12-06 18:10:02,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:02,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374830626] [2021-12-06 18:10:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:02,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:03,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:03,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374830626] [2021-12-06 18:10:03,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374830626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:03,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:03,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:03,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587876530] [2021-12-06 18:10:03,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:03,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:03,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:03,075 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:03,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 120 transitions, 644 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:03,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:03,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:03,333 INFO L129 PetriNetUnfolder]: 82/424 cut-off events. [2021-12-06 18:10:03,334 INFO L130 PetriNetUnfolder]: For 1326/1333 co-relation queries the response was YES. [2021-12-06 18:10:03,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 424 events. 82/424 cut-off events. For 1326/1333 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2082 event pairs, 40 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 1532. Up to 163 conditions per place. [2021-12-06 18:10:03,337 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 22 changer transitions 32/178 dead transitions. [2021-12-06 18:10:03,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 178 transitions, 1412 flow [2021-12-06 18:10:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:10:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-06 18:10:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1479 transitions. [2021-12-06 18:10:03,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2021-12-06 18:10:03,339 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1479 transitions. [2021-12-06 18:10:03,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1479 transitions. [2021-12-06 18:10:03,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:03,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1479 transitions. [2021-12-06 18:10:03,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.22727272727273) internal successors, (1479), 22 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,344 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,344 INFO L186 Difference]: Start difference. First operand has 211 places, 120 transitions, 644 flow. Second operand 22 states and 1479 transitions. [2021-12-06 18:10:03,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 178 transitions, 1412 flow [2021-12-06 18:10:03,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 178 transitions, 1203 flow, removed 36 selfloop flow, removed 24 redundant places. [2021-12-06 18:10:03,351 INFO L242 Difference]: Finished difference. Result has 193 places, 132 transitions, 776 flow [2021-12-06 18:10:03,351 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=776, PETRI_PLACES=193, PETRI_TRANSITIONS=132} [2021-12-06 18:10:03,351 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2021-12-06 18:10:03,352 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 132 transitions, 776 flow [2021-12-06 18:10:03,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,352 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:03,352 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:03,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:10:03,352 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1321167298, now seen corresponding path program 14 times [2021-12-06 18:10:03,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:03,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452558157] [2021-12-06 18:10:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:03,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:03,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:03,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452558157] [2021-12-06 18:10:03,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452558157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:03,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:03,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:03,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164637388] [2021-12-06 18:10:03,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:03,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:03,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:03,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:03,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 132 transitions, 776 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:03,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:03,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:03,637 INFO L129 PetriNetUnfolder]: 83/425 cut-off events. [2021-12-06 18:10:03,638 INFO L130 PetriNetUnfolder]: For 1178/1185 co-relation queries the response was YES. [2021-12-06 18:10:03,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1633 conditions, 425 events. 83/425 cut-off events. For 1178/1185 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2125 event pairs, 42 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 1575. Up to 169 conditions per place. [2021-12-06 18:10:03,641 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 27 changer transitions 26/172 dead transitions. [2021-12-06 18:10:03,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 172 transitions, 1343 flow [2021-12-06 18:10:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1151 transitions. [2021-12-06 18:10:03,643 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6637831603229527 [2021-12-06 18:10:03,643 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1151 transitions. [2021-12-06 18:10:03,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1151 transitions. [2021-12-06 18:10:03,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:03,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1151 transitions. [2021-12-06 18:10:03,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.70588235294117) internal successors, (1151), 17 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,647 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,647 INFO L186 Difference]: Start difference. First operand has 193 places, 132 transitions, 776 flow. Second operand 17 states and 1151 transitions. [2021-12-06 18:10:03,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 172 transitions, 1343 flow [2021-12-06 18:10:03,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 172 transitions, 1244 flow, removed 43 selfloop flow, removed 11 redundant places. [2021-12-06 18:10:03,654 INFO L242 Difference]: Finished difference. Result has 194 places, 140 transitions, 902 flow [2021-12-06 18:10:03,655 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=902, PETRI_PLACES=194, PETRI_TRANSITIONS=140} [2021-12-06 18:10:03,655 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 103 predicate places. [2021-12-06 18:10:03,655 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 140 transitions, 902 flow [2021-12-06 18:10:03,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,655 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:03,656 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:03,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 18:10:03,656 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1555389636, now seen corresponding path program 15 times [2021-12-06 18:10:03,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:03,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136258162] [2021-12-06 18:10:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:03,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:03,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136258162] [2021-12-06 18:10:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136258162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:03,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:03,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:03,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111909781] [2021-12-06 18:10:03,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:03,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:03,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:03,727 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:03,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 140 transitions, 902 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:03,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:03,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:03,934 INFO L129 PetriNetUnfolder]: 82/443 cut-off events. [2021-12-06 18:10:03,934 INFO L130 PetriNetUnfolder]: For 1252/1259 co-relation queries the response was YES. [2021-12-06 18:10:03,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 443 events. 82/443 cut-off events. For 1252/1259 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2267 event pairs, 41 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 1641. Up to 170 conditions per place. [2021-12-06 18:10:03,939 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 26 changer transitions 29/179 dead transitions. [2021-12-06 18:10:03,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 179 transitions, 1469 flow [2021-12-06 18:10:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:10:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 18:10:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1090 transitions. [2021-12-06 18:10:03,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6678921568627451 [2021-12-06 18:10:03,940 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1090 transitions. [2021-12-06 18:10:03,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1090 transitions. [2021-12-06 18:10:03,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:03,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1090 transitions. [2021-12-06 18:10:03,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 68.125) internal successors, (1090), 16 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,943 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,943 INFO L186 Difference]: Start difference. First operand has 194 places, 140 transitions, 902 flow. Second operand 16 states and 1090 transitions. [2021-12-06 18:10:03,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 179 transitions, 1469 flow [2021-12-06 18:10:03,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 179 transitions, 1376 flow, removed 21 selfloop flow, removed 8 redundant places. [2021-12-06 18:10:03,952 INFO L242 Difference]: Finished difference. Result has 202 places, 144 transitions, 963 flow [2021-12-06 18:10:03,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=963, PETRI_PLACES=202, PETRI_TRANSITIONS=144} [2021-12-06 18:10:03,952 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 111 predicate places. [2021-12-06 18:10:03,952 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 144 transitions, 963 flow [2021-12-06 18:10:03,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:03,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:03,953 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:03,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 18:10:03,953 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 700556136, now seen corresponding path program 16 times [2021-12-06 18:10:03,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:03,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849915677] [2021-12-06 18:10:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:03,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:04,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:04,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849915677] [2021-12-06 18:10:04,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849915677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:04,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:04,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:04,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660817833] [2021-12-06 18:10:04,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:04,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:04,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:04,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:04,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 144 transitions, 963 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:04,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:04,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:04,269 INFO L129 PetriNetUnfolder]: 80/431 cut-off events. [2021-12-06 18:10:04,269 INFO L130 PetriNetUnfolder]: For 1451/1458 co-relation queries the response was YES. [2021-12-06 18:10:04,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1722 conditions, 431 events. 80/431 cut-off events. For 1451/1458 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2181 event pairs, 37 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 1660. Up to 161 conditions per place. [2021-12-06 18:10:04,273 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 69 selfloop transitions, 25 changer transitions 32/187 dead transitions. [2021-12-06 18:10:04,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 187 transitions, 1656 flow [2021-12-06 18:10:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:10:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-06 18:10:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1413 transitions. [2021-12-06 18:10:04,274 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2021-12-06 18:10:04,275 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1413 transitions. [2021-12-06 18:10:04,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1413 transitions. [2021-12-06 18:10:04,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:04,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1413 transitions. [2021-12-06 18:10:04,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.28571428571429) internal successors, (1413), 21 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,278 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,278 INFO L186 Difference]: Start difference. First operand has 202 places, 144 transitions, 963 flow. Second operand 21 states and 1413 transitions. [2021-12-06 18:10:04,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 187 transitions, 1656 flow [2021-12-06 18:10:04,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 187 transitions, 1544 flow, removed 29 selfloop flow, removed 8 redundant places. [2021-12-06 18:10:04,288 INFO L242 Difference]: Finished difference. Result has 220 places, 145 transitions, 1015 flow [2021-12-06 18:10:04,288 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1015, PETRI_PLACES=220, PETRI_TRANSITIONS=145} [2021-12-06 18:10:04,288 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 129 predicate places. [2021-12-06 18:10:04,288 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 145 transitions, 1015 flow [2021-12-06 18:10:04,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,289 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:04,289 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:04,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 18:10:04,289 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2106748736, now seen corresponding path program 17 times [2021-12-06 18:10:04,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314304808] [2021-12-06 18:10:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:04,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:04,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314304808] [2021-12-06 18:10:04,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314304808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:04,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:04,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:04,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198031030] [2021-12-06 18:10:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:04,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:04,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:04,354 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:04,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 145 transitions, 1015 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:04,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:04,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:04,544 INFO L129 PetriNetUnfolder]: 70/393 cut-off events. [2021-12-06 18:10:04,544 INFO L130 PetriNetUnfolder]: For 1417/1424 co-relation queries the response was YES. [2021-12-06 18:10:04,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 393 events. 70/393 cut-off events. For 1417/1424 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1898 event pairs, 38 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1510. Up to 162 conditions per place. [2021-12-06 18:10:04,548 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 60 selfloop transitions, 14 changer transitions 34/169 dead transitions. [2021-12-06 18:10:04,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 169 transitions, 1423 flow [2021-12-06 18:10:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1212 transitions. [2021-12-06 18:10:04,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-06 18:10:04,550 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1212 transitions. [2021-12-06 18:10:04,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1212 transitions. [2021-12-06 18:10:04,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:04,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1212 transitions. [2021-12-06 18:10:04,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.33333333333333) internal successors, (1212), 18 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,553 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,553 INFO L186 Difference]: Start difference. First operand has 220 places, 145 transitions, 1015 flow. Second operand 18 states and 1212 transitions. [2021-12-06 18:10:04,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 169 transitions, 1423 flow [2021-12-06 18:10:04,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 169 transitions, 1311 flow, removed 36 selfloop flow, removed 15 redundant places. [2021-12-06 18:10:04,563 INFO L242 Difference]: Finished difference. Result has 216 places, 130 transitions, 807 flow [2021-12-06 18:10:04,563 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=807, PETRI_PLACES=216, PETRI_TRANSITIONS=130} [2021-12-06 18:10:04,563 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 125 predicate places. [2021-12-06 18:10:04,564 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 130 transitions, 807 flow [2021-12-06 18:10:04,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,564 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:04,564 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:04,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 18:10:04,564 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:04,564 INFO L85 PathProgramCache]: Analyzing trace with hash -651882364, now seen corresponding path program 18 times [2021-12-06 18:10:04,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:04,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39714112] [2021-12-06 18:10:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:04,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:04,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:04,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39714112] [2021-12-06 18:10:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39714112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:04,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:04,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:04,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146383819] [2021-12-06 18:10:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:04,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:04,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:04,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:04,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 130 transitions, 807 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:04,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:04,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:04,832 INFO L129 PetriNetUnfolder]: 67/376 cut-off events. [2021-12-06 18:10:04,833 INFO L130 PetriNetUnfolder]: For 1212/1219 co-relation queries the response was YES. [2021-12-06 18:10:04,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 376 events. 67/376 cut-off events. For 1212/1219 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1742 event pairs, 40 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 1385. Up to 160 conditions per place. [2021-12-06 18:10:04,836 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 51 selfloop transitions, 12 changer transitions 33/157 dead transitions. [2021-12-06 18:10:04,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 157 transitions, 1199 flow [2021-12-06 18:10:04,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1214 transitions. [2021-12-06 18:10:04,838 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6612200435729847 [2021-12-06 18:10:04,838 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1214 transitions. [2021-12-06 18:10:04,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1214 transitions. [2021-12-06 18:10:04,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:04,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1214 transitions. [2021-12-06 18:10:04,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,841 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,841 INFO L186 Difference]: Start difference. First operand has 216 places, 130 transitions, 807 flow. Second operand 18 states and 1214 transitions. [2021-12-06 18:10:04,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 157 transitions, 1199 flow [2021-12-06 18:10:04,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 157 transitions, 1068 flow, removed 20 selfloop flow, removed 20 redundant places. [2021-12-06 18:10:04,849 INFO L242 Difference]: Finished difference. Result has 198 places, 122 transitions, 672 flow [2021-12-06 18:10:04,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=672, PETRI_PLACES=198, PETRI_TRANSITIONS=122} [2021-12-06 18:10:04,849 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 107 predicate places. [2021-12-06 18:10:04,849 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 122 transitions, 672 flow [2021-12-06 18:10:04,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:04,849 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:04,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 18:10:04,850 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1438871678, now seen corresponding path program 19 times [2021-12-06 18:10:04,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:04,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306919359] [2021-12-06 18:10:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:04,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:04,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306919359] [2021-12-06 18:10:04,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306919359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:04,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:04,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:04,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569792312] [2021-12-06 18:10:04,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:04,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:04,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:04,930 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:04,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 122 transitions, 672 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:04,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:04,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:04,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:05,080 INFO L129 PetriNetUnfolder]: 63/373 cut-off events. [2021-12-06 18:10:05,080 INFO L130 PetriNetUnfolder]: For 881/888 co-relation queries the response was YES. [2021-12-06 18:10:05,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 373 events. 63/373 cut-off events. For 881/888 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1715 event pairs, 36 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1273. Up to 160 conditions per place. [2021-12-06 18:10:05,083 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 17 changer transitions 30/157 dead transitions. [2021-12-06 18:10:05,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 157 transitions, 1157 flow [2021-12-06 18:10:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1150 transitions. [2021-12-06 18:10:05,085 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6632064590542099 [2021-12-06 18:10:05,085 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1150 transitions. [2021-12-06 18:10:05,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1150 transitions. [2021-12-06 18:10:05,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:05,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1150 transitions. [2021-12-06 18:10:05,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.6470588235294) internal successors, (1150), 17 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,088 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,088 INFO L186 Difference]: Start difference. First operand has 198 places, 122 transitions, 672 flow. Second operand 17 states and 1150 transitions. [2021-12-06 18:10:05,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 157 transitions, 1157 flow [2021-12-06 18:10:05,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 157 transitions, 1042 flow, removed 32 selfloop flow, removed 17 redundant places. [2021-12-06 18:10:05,094 INFO L242 Difference]: Finished difference. Result has 189 places, 125 transitions, 714 flow [2021-12-06 18:10:05,094 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=714, PETRI_PLACES=189, PETRI_TRANSITIONS=125} [2021-12-06 18:10:05,095 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 98 predicate places. [2021-12-06 18:10:05,095 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 125 transitions, 714 flow [2021-12-06 18:10:05,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:05,095 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:05,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 18:10:05,096 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:05,096 INFO L85 PathProgramCache]: Analyzing trace with hash -458697492, now seen corresponding path program 20 times [2021-12-06 18:10:05,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:05,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520180018] [2021-12-06 18:10:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:05,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:05,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:05,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520180018] [2021-12-06 18:10:05,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520180018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:05,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:05,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:05,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717583050] [2021-12-06 18:10:05,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:05,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:05,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:05,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:05,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 125 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:05,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:05,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:05,334 INFO L129 PetriNetUnfolder]: 54/307 cut-off events. [2021-12-06 18:10:05,334 INFO L130 PetriNetUnfolder]: For 679/686 co-relation queries the response was YES. [2021-12-06 18:10:05,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 307 events. 54/307 cut-off events. For 679/686 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1298 event pairs, 36 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 1058. Up to 138 conditions per place. [2021-12-06 18:10:05,337 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 38 selfloop transitions, 0 changer transitions 45/138 dead transitions. [2021-12-06 18:10:05,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 138 transitions, 934 flow [2021-12-06 18:10:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1202 transitions. [2021-12-06 18:10:05,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6546840958605664 [2021-12-06 18:10:05,340 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1202 transitions. [2021-12-06 18:10:05,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1202 transitions. [2021-12-06 18:10:05,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:05,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1202 transitions. [2021-12-06 18:10:05,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.77777777777777) internal successors, (1202), 18 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,344 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,344 INFO L186 Difference]: Start difference. First operand has 189 places, 125 transitions, 714 flow. Second operand 18 states and 1202 transitions. [2021-12-06 18:10:05,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 138 transitions, 934 flow [2021-12-06 18:10:05,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 138 transitions, 842 flow, removed 28 selfloop flow, removed 11 redundant places. [2021-12-06 18:10:05,351 INFO L242 Difference]: Finished difference. Result has 190 places, 93 transitions, 383 flow [2021-12-06 18:10:05,351 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=383, PETRI_PLACES=190, PETRI_TRANSITIONS=93} [2021-12-06 18:10:05,352 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 99 predicate places. [2021-12-06 18:10:05,352 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 93 transitions, 383 flow [2021-12-06 18:10:05,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,352 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:05,352 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:05,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 18:10:05,352 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash -269060366, now seen corresponding path program 4 times [2021-12-06 18:10:05,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:05,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930844936] [2021-12-06 18:10:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:05,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:05,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930844936] [2021-12-06 18:10:05,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930844936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:05,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:05,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:05,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153008649] [2021-12-06 18:10:05,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:05,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:05,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:05,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:05,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 93 transitions, 383 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:05,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:05,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:05,612 INFO L129 PetriNetUnfolder]: 56/288 cut-off events. [2021-12-06 18:10:05,612 INFO L130 PetriNetUnfolder]: For 601/605 co-relation queries the response was YES. [2021-12-06 18:10:05,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 288 events. 56/288 cut-off events. For 601/605 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1161 event pairs, 14 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 907. Up to 57 conditions per place. [2021-12-06 18:10:05,615 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 51 selfloop transitions, 14 changer transitions 28/148 dead transitions. [2021-12-06 18:10:05,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 148 transitions, 947 flow [2021-12-06 18:10:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:10:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-06 18:10:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1345 transitions. [2021-12-06 18:10:05,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6593137254901961 [2021-12-06 18:10:05,617 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1345 transitions. [2021-12-06 18:10:05,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1345 transitions. [2021-12-06 18:10:05,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:05,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1345 transitions. [2021-12-06 18:10:05,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.25) internal successors, (1345), 20 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,622 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,622 INFO L186 Difference]: Start difference. First operand has 190 places, 93 transitions, 383 flow. Second operand 20 states and 1345 transitions. [2021-12-06 18:10:05,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 148 transitions, 947 flow [2021-12-06 18:10:05,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 148 transitions, 920 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-12-06 18:10:05,628 INFO L242 Difference]: Finished difference. Result has 170 places, 103 transitions, 544 flow [2021-12-06 18:10:05,628 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=544, PETRI_PLACES=170, PETRI_TRANSITIONS=103} [2021-12-06 18:10:05,629 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 79 predicate places. [2021-12-06 18:10:05,629 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 103 transitions, 544 flow [2021-12-06 18:10:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,629 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:05,629 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:05,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 18:10:05,630 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:05,630 INFO L85 PathProgramCache]: Analyzing trace with hash -502436508, now seen corresponding path program 5 times [2021-12-06 18:10:05,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:05,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965926866] [2021-12-06 18:10:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:05,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:05,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:05,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965926866] [2021-12-06 18:10:05,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965926866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:05,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:05,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:05,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753205650] [2021-12-06 18:10:05,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:05,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:05,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:05,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:05,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 103 transitions, 544 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:05,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:05,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:05,859 INFO L129 PetriNetUnfolder]: 57/292 cut-off events. [2021-12-06 18:10:05,859 INFO L130 PetriNetUnfolder]: For 1574/1576 co-relation queries the response was YES. [2021-12-06 18:10:05,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 292 events. 57/292 cut-off events. For 1574/1576 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1244 event pairs, 15 based on Foata normal form. 1/290 useless extension candidates. Maximal degree in co-relation 1223. Up to 70 conditions per place. [2021-12-06 18:10:05,862 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 23 changer transitions 20/147 dead transitions. [2021-12-06 18:10:05,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 147 transitions, 1183 flow [2021-12-06 18:10:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:10:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 18:10:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1078 transitions. [2021-12-06 18:10:05,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6605392156862745 [2021-12-06 18:10:05,863 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1078 transitions. [2021-12-06 18:10:05,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1078 transitions. [2021-12-06 18:10:05,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:05,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1078 transitions. [2021-12-06 18:10:05,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.375) internal successors, (1078), 16 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,866 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,866 INFO L186 Difference]: Start difference. First operand has 170 places, 103 transitions, 544 flow. Second operand 16 states and 1078 transitions. [2021-12-06 18:10:05,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 147 transitions, 1183 flow [2021-12-06 18:10:05,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 147 transitions, 1044 flow, removed 62 selfloop flow, removed 9 redundant places. [2021-12-06 18:10:05,873 INFO L242 Difference]: Finished difference. Result has 175 places, 113 transitions, 672 flow [2021-12-06 18:10:05,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=672, PETRI_PLACES=175, PETRI_TRANSITIONS=113} [2021-12-06 18:10:05,874 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 84 predicate places. [2021-12-06 18:10:05,874 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 113 transitions, 672 flow [2021-12-06 18:10:05,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,874 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:05,874 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:05,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 18:10:05,874 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1767224684, now seen corresponding path program 6 times [2021-12-06 18:10:05,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:05,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770470400] [2021-12-06 18:10:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:05,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:05,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:05,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770470400] [2021-12-06 18:10:05,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770470400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:05,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:05,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:05,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489681816] [2021-12-06 18:10:05,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:05,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:05,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:05,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:05,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 113 transitions, 672 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:05,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:05,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:05,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:06,155 INFO L129 PetriNetUnfolder]: 65/331 cut-off events. [2021-12-06 18:10:06,156 INFO L130 PetriNetUnfolder]: For 1592/1608 co-relation queries the response was YES. [2021-12-06 18:10:06,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 331 events. 65/331 cut-off events. For 1592/1608 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1554 event pairs, 14 based on Foata normal form. 4/332 useless extension candidates. Maximal degree in co-relation 1360. Up to 72 conditions per place. [2021-12-06 18:10:06,159 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 60 selfloop transitions, 23 changer transitions 29/167 dead transitions. [2021-12-06 18:10:06,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 167 transitions, 1438 flow [2021-12-06 18:10:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:10:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-06 18:10:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1411 transitions. [2021-12-06 18:10:06,161 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2021-12-06 18:10:06,161 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1411 transitions. [2021-12-06 18:10:06,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1411 transitions. [2021-12-06 18:10:06,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:06,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1411 transitions. [2021-12-06 18:10:06,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.19047619047619) internal successors, (1411), 21 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,172 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,173 INFO L186 Difference]: Start difference. First operand has 175 places, 113 transitions, 672 flow. Second operand 21 states and 1411 transitions. [2021-12-06 18:10:06,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 167 transitions, 1438 flow [2021-12-06 18:10:06,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 167 transitions, 1287 flow, removed 51 selfloop flow, removed 9 redundant places. [2021-12-06 18:10:06,184 INFO L242 Difference]: Finished difference. Result has 195 places, 123 transitions, 801 flow [2021-12-06 18:10:06,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=801, PETRI_PLACES=195, PETRI_TRANSITIONS=123} [2021-12-06 18:10:06,185 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 104 predicate places. [2021-12-06 18:10:06,185 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 123 transitions, 801 flow [2021-12-06 18:10:06,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:06,186 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:06,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 18:10:06,186 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1841641200, now seen corresponding path program 7 times [2021-12-06 18:10:06,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:06,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025408945] [2021-12-06 18:10:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:06,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:06,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025408945] [2021-12-06 18:10:06,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025408945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:06,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:06,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:06,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837279127] [2021-12-06 18:10:06,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:06,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:06,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:06,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:06,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 123 transitions, 801 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:06,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:06,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:06,465 INFO L129 PetriNetUnfolder]: 61/321 cut-off events. [2021-12-06 18:10:06,465 INFO L130 PetriNetUnfolder]: For 1900/1922 co-relation queries the response was YES. [2021-12-06 18:10:06,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 321 events. 61/321 cut-off events. For 1900/1922 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1493 event pairs, 10 based on Foata normal form. 7/325 useless extension candidates. Maximal degree in co-relation 1387. Up to 68 conditions per place. [2021-12-06 18:10:06,468 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 26 changer transitions 34/173 dead transitions. [2021-12-06 18:10:06,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 173 transitions, 1544 flow [2021-12-06 18:10:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:10:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-06 18:10:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1472 transitions. [2021-12-06 18:10:06,470 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559714795008913 [2021-12-06 18:10:06,470 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1472 transitions. [2021-12-06 18:10:06,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1472 transitions. [2021-12-06 18:10:06,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:06,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1472 transitions. [2021-12-06 18:10:06,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.9090909090909) internal successors, (1472), 22 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,474 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,474 INFO L186 Difference]: Start difference. First operand has 195 places, 123 transitions, 801 flow. Second operand 22 states and 1472 transitions. [2021-12-06 18:10:06,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 173 transitions, 1544 flow [2021-12-06 18:10:06,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 173 transitions, 1395 flow, removed 59 selfloop flow, removed 14 redundant places. [2021-12-06 18:10:06,484 INFO L242 Difference]: Finished difference. Result has 203 places, 123 transitions, 834 flow [2021-12-06 18:10:06,485 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=834, PETRI_PLACES=203, PETRI_TRANSITIONS=123} [2021-12-06 18:10:06,485 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 112 predicate places. [2021-12-06 18:10:06,485 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 123 transitions, 834 flow [2021-12-06 18:10:06,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:06,485 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:06,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 18:10:06,486 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash -699870336, now seen corresponding path program 8 times [2021-12-06 18:10:06,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:06,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939832024] [2021-12-06 18:10:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:06,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:06,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939832024] [2021-12-06 18:10:06,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939832024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:06,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:06,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:06,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495497669] [2021-12-06 18:10:06,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:06,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:06,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:06,554 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:06,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 123 transitions, 834 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:06,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:06,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:06,734 INFO L129 PetriNetUnfolder]: 48/272 cut-off events. [2021-12-06 18:10:06,734 INFO L130 PetriNetUnfolder]: For 1517/1537 co-relation queries the response was YES. [2021-12-06 18:10:06,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 272 events. 48/272 cut-off events. For 1517/1537 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1096 event pairs, 9 based on Foata normal form. 7/277 useless extension candidates. Maximal degree in co-relation 1161. Up to 66 conditions per place. [2021-12-06 18:10:06,738 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 14 changer transitions 31/149 dead transitions. [2021-12-06 18:10:06,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 149 transitions, 1260 flow [2021-12-06 18:10:06,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:06,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1203 transitions. [2021-12-06 18:10:06,740 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6552287581699346 [2021-12-06 18:10:06,741 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1203 transitions. [2021-12-06 18:10:06,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1203 transitions. [2021-12-06 18:10:06,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:06,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1203 transitions. [2021-12-06 18:10:06,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.83333333333333) internal successors, (1203), 18 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,745 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,745 INFO L186 Difference]: Start difference. First operand has 203 places, 123 transitions, 834 flow. Second operand 18 states and 1203 transitions. [2021-12-06 18:10:06,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 149 transitions, 1260 flow [2021-12-06 18:10:06,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 149 transitions, 1131 flow, removed 47 selfloop flow, removed 16 redundant places. [2021-12-06 18:10:06,755 INFO L242 Difference]: Finished difference. Result has 197 places, 108 transitions, 624 flow [2021-12-06 18:10:06,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=624, PETRI_PLACES=197, PETRI_TRANSITIONS=108} [2021-12-06 18:10:06,756 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 106 predicate places. [2021-12-06 18:10:06,756 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 108 transitions, 624 flow [2021-12-06 18:10:06,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,756 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:06,756 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:06,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 18:10:06,757 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1093058920, now seen corresponding path program 9 times [2021-12-06 18:10:06,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:06,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571420605] [2021-12-06 18:10:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:06,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:06,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571420605] [2021-12-06 18:10:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571420605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:06,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:06,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:06,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936176872] [2021-12-06 18:10:06,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:06,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:06,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:06,833 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:06,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 108 transitions, 624 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:06,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:06,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:06,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:07,010 INFO L129 PetriNetUnfolder]: 50/273 cut-off events. [2021-12-06 18:10:07,010 INFO L130 PetriNetUnfolder]: For 1368/1382 co-relation queries the response was YES. [2021-12-06 18:10:07,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 273 events. 50/273 cut-off events. For 1368/1382 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1086 event pairs, 13 based on Foata normal form. 3/273 useless extension candidates. Maximal degree in co-relation 1160. Up to 66 conditions per place. [2021-12-06 18:10:07,012 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 46 selfloop transitions, 22 changer transitions 21/144 dead transitions. [2021-12-06 18:10:07,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 144 transitions, 1213 flow [2021-12-06 18:10:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1209 transitions. [2021-12-06 18:10:07,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2021-12-06 18:10:07,014 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1209 transitions. [2021-12-06 18:10:07,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1209 transitions. [2021-12-06 18:10:07,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:07,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1209 transitions. [2021-12-06 18:10:07,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.16666666666667) internal successors, (1209), 18 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,020 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,021 INFO L186 Difference]: Start difference. First operand has 197 places, 108 transitions, 624 flow. Second operand 18 states and 1209 transitions. [2021-12-06 18:10:07,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 144 transitions, 1213 flow [2021-12-06 18:10:07,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 144 transitions, 1044 flow, removed 38 selfloop flow, removed 19 redundant places. [2021-12-06 18:10:07,028 INFO L242 Difference]: Finished difference. Result has 181 places, 117 transitions, 727 flow [2021-12-06 18:10:07,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=727, PETRI_PLACES=181, PETRI_TRANSITIONS=117} [2021-12-06 18:10:07,028 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 90 predicate places. [2021-12-06 18:10:07,028 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 117 transitions, 727 flow [2021-12-06 18:10:07,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:07,028 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:07,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 18:10:07,029 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1172302702, now seen corresponding path program 10 times [2021-12-06 18:10:07,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:07,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907493206] [2021-12-06 18:10:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:07,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:07,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:07,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907493206] [2021-12-06 18:10:07,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907493206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:07,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:07,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:07,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883177054] [2021-12-06 18:10:07,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:07,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:07,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:07,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:07,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:07,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 117 transitions, 727 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:07,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:07,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:07,250 INFO L129 PetriNetUnfolder]: 47/272 cut-off events. [2021-12-06 18:10:07,250 INFO L130 PetriNetUnfolder]: For 980/986 co-relation queries the response was YES. [2021-12-06 18:10:07,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 272 events. 47/272 cut-off events. For 980/986 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1114 event pairs, 16 based on Foata normal form. 1/269 useless extension candidates. Maximal degree in co-relation 1075. Up to 66 conditions per place. [2021-12-06 18:10:07,253 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 47 selfloop transitions, 24 changer transitions 22/148 dead transitions. [2021-12-06 18:10:07,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 148 transitions, 1238 flow [2021-12-06 18:10:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1145 transitions. [2021-12-06 18:10:07,254 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660322952710496 [2021-12-06 18:10:07,254 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1145 transitions. [2021-12-06 18:10:07,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1145 transitions. [2021-12-06 18:10:07,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:07,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1145 transitions. [2021-12-06 18:10:07,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.3529411764706) internal successors, (1145), 17 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,257 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,257 INFO L186 Difference]: Start difference. First operand has 181 places, 117 transitions, 727 flow. Second operand 17 states and 1145 transitions. [2021-12-06 18:10:07,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 148 transitions, 1238 flow [2021-12-06 18:10:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 148 transitions, 1169 flow, removed 29 selfloop flow, removed 5 redundant places. [2021-12-06 18:10:07,264 INFO L242 Difference]: Finished difference. Result has 193 places, 121 transitions, 820 flow [2021-12-06 18:10:07,264 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=820, PETRI_PLACES=193, PETRI_TRANSITIONS=121} [2021-12-06 18:10:07,265 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2021-12-06 18:10:07,265 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 121 transitions, 820 flow [2021-12-06 18:10:07,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,265 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:07,265 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 18:10:07,265 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1206667032, now seen corresponding path program 11 times [2021-12-06 18:10:07,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540973532] [2021-12-06 18:10:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:07,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:07,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540973532] [2021-12-06 18:10:07,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540973532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:07,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:07,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:07,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477877118] [2021-12-06 18:10:07,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:07,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:07,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:07,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:07,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 121 transitions, 820 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:07,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:07,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:07,485 INFO L129 PetriNetUnfolder]: 44/260 cut-off events. [2021-12-06 18:10:07,485 INFO L130 PetriNetUnfolder]: For 1052/1066 co-relation queries the response was YES. [2021-12-06 18:10:07,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 260 events. 44/260 cut-off events. For 1052/1066 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1032 event pairs, 12 based on Foata normal form. 3/260 useless extension candidates. Maximal degree in co-relation 1044. Up to 66 conditions per place. [2021-12-06 18:10:07,487 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 46 selfloop transitions, 15 changer transitions 29/145 dead transitions. [2021-12-06 18:10:07,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 145 transitions, 1218 flow [2021-12-06 18:10:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1208 transitions. [2021-12-06 18:10:07,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6579520697167756 [2021-12-06 18:10:07,489 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1208 transitions. [2021-12-06 18:10:07,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1208 transitions. [2021-12-06 18:10:07,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:07,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1208 transitions. [2021-12-06 18:10:07,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,491 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,491 INFO L186 Difference]: Start difference. First operand has 193 places, 121 transitions, 820 flow. Second operand 18 states and 1208 transitions. [2021-12-06 18:10:07,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 145 transitions, 1218 flow [2021-12-06 18:10:07,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 145 transitions, 1127 flow, removed 24 selfloop flow, removed 8 redundant places. [2021-12-06 18:10:07,499 INFO L242 Difference]: Finished difference. Result has 202 places, 112 transitions, 687 flow [2021-12-06 18:10:07,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=687, PETRI_PLACES=202, PETRI_TRANSITIONS=112} [2021-12-06 18:10:07,500 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 111 predicate places. [2021-12-06 18:10:07,500 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 112 transitions, 687 flow [2021-12-06 18:10:07,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:07,500 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:07,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 18:10:07,500 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1678314102, now seen corresponding path program 12 times [2021-12-06 18:10:07,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:07,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016394026] [2021-12-06 18:10:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:07,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:07,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:07,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016394026] [2021-12-06 18:10:07,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016394026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:07,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:07,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:07,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043860619] [2021-12-06 18:10:07,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:07,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:07,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:07,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:07,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:07,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 112 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:07,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:07,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:07,692 INFO L129 PetriNetUnfolder]: 34/228 cut-off events. [2021-12-06 18:10:07,692 INFO L130 PetriNetUnfolder]: For 909/915 co-relation queries the response was YES. [2021-12-06 18:10:07,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 228 events. 34/228 cut-off events. For 909/915 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 11 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 852. Up to 53 conditions per place. [2021-12-06 18:10:07,694 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 37 selfloop transitions, 3 changer transitions 34/129 dead transitions. [2021-12-06 18:10:07,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 129 transitions, 959 flow [2021-12-06 18:10:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1136 transitions. [2021-12-06 18:10:07,696 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6551326412918108 [2021-12-06 18:10:07,696 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1136 transitions. [2021-12-06 18:10:07,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1136 transitions. [2021-12-06 18:10:07,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:07,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1136 transitions. [2021-12-06 18:10:07,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.82352941176471) internal successors, (1136), 17 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,698 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,698 INFO L186 Difference]: Start difference. First operand has 202 places, 112 transitions, 687 flow. Second operand 17 states and 1136 transitions. [2021-12-06 18:10:07,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 129 transitions, 959 flow [2021-12-06 18:10:07,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 129 transitions, 851 flow, removed 26 selfloop flow, removed 20 redundant places. [2021-12-06 18:10:07,704 INFO L242 Difference]: Finished difference. Result has 186 places, 92 transitions, 393 flow [2021-12-06 18:10:07,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=393, PETRI_PLACES=186, PETRI_TRANSITIONS=92} [2021-12-06 18:10:07,705 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 95 predicate places. [2021-12-06 18:10:07,705 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 92 transitions, 393 flow [2021-12-06 18:10:07,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,705 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:07,705 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:07,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 18:10:07,705 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash 873749492, now seen corresponding path program 13 times [2021-12-06 18:10:07,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:07,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632019964] [2021-12-06 18:10:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:07,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:07,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:07,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632019964] [2021-12-06 18:10:07,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632019964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:07,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:07,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:07,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595535228] [2021-12-06 18:10:07,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:07,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:07,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:07,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:07,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:07,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 92 transitions, 393 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:07,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:07,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:07,954 INFO L129 PetriNetUnfolder]: 39/241 cut-off events. [2021-12-06 18:10:07,954 INFO L130 PetriNetUnfolder]: For 786/787 co-relation queries the response was YES. [2021-12-06 18:10:07,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 241 events. 39/241 cut-off events. For 786/787 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 858 event pairs, 5 based on Foata normal form. 1/242 useless extension candidates. Maximal degree in co-relation 834. Up to 33 conditions per place. [2021-12-06 18:10:07,956 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 43 selfloop transitions, 19 changer transitions 28/145 dead transitions. [2021-12-06 18:10:07,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 145 transitions, 1058 flow [2021-12-06 18:10:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:10:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-06 18:10:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1469 transitions. [2021-12-06 18:10:07,958 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6546345811051694 [2021-12-06 18:10:07,958 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1469 transitions. [2021-12-06 18:10:07,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1469 transitions. [2021-12-06 18:10:07,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:07,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1469 transitions. [2021-12-06 18:10:07,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.77272727272727) internal successors, (1469), 22 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,961 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,961 INFO L186 Difference]: Start difference. First operand has 186 places, 92 transitions, 393 flow. Second operand 22 states and 1469 transitions. [2021-12-06 18:10:07,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 145 transitions, 1058 flow [2021-12-06 18:10:07,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 145 transitions, 843 flow, removed 35 selfloop flow, removed 24 redundant places. [2021-12-06 18:10:07,965 INFO L242 Difference]: Finished difference. Result has 168 places, 103 transitions, 486 flow [2021-12-06 18:10:07,965 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=486, PETRI_PLACES=168, PETRI_TRANSITIONS=103} [2021-12-06 18:10:07,966 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 77 predicate places. [2021-12-06 18:10:07,966 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 103 transitions, 486 flow [2021-12-06 18:10:07,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:07,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:07,966 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:07,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 18:10:07,966 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -210010526, now seen corresponding path program 14 times [2021-12-06 18:10:07,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:07,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323275668] [2021-12-06 18:10:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:07,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:08,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:08,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323275668] [2021-12-06 18:10:08,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323275668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:08,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:08,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:08,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565053747] [2021-12-06 18:10:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:08,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:08,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:08,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:08,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 103 transitions, 486 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:08,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:08,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:08,189 INFO L129 PetriNetUnfolder]: 36/227 cut-off events. [2021-12-06 18:10:08,190 INFO L130 PetriNetUnfolder]: For 580/581 co-relation queries the response was YES. [2021-12-06 18:10:08,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 227 events. 36/227 cut-off events. For 580/581 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 772 event pairs, 6 based on Foata normal form. 1/226 useless extension candidates. Maximal degree in co-relation 809. Up to 31 conditions per place. [2021-12-06 18:10:08,191 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 39 selfloop transitions, 21 changer transitions 28/143 dead transitions. [2021-12-06 18:10:08,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 143 transitions, 1030 flow [2021-12-06 18:10:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:10:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-06 18:10:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1402 transitions. [2021-12-06 18:10:08,193 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6545284780578898 [2021-12-06 18:10:08,193 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1402 transitions. [2021-12-06 18:10:08,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1402 transitions. [2021-12-06 18:10:08,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:08,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1402 transitions. [2021-12-06 18:10:08,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.76190476190476) internal successors, (1402), 21 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,196 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,196 INFO L186 Difference]: Start difference. First operand has 168 places, 103 transitions, 486 flow. Second operand 21 states and 1402 transitions. [2021-12-06 18:10:08,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 143 transitions, 1030 flow [2021-12-06 18:10:08,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 143 transitions, 936 flow, removed 41 selfloop flow, removed 11 redundant places. [2021-12-06 18:10:08,200 INFO L242 Difference]: Finished difference. Result has 177 places, 105 transitions, 571 flow [2021-12-06 18:10:08,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=571, PETRI_PLACES=177, PETRI_TRANSITIONS=105} [2021-12-06 18:10:08,201 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 86 predicate places. [2021-12-06 18:10:08,201 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 105 transitions, 571 flow [2021-12-06 18:10:08,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:08,201 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:08,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 18:10:08,201 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1932521730, now seen corresponding path program 15 times [2021-12-06 18:10:08,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:08,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746734424] [2021-12-06 18:10:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:08,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:08,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:08,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746734424] [2021-12-06 18:10:08,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746734424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:08,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:08,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:08,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020093570] [2021-12-06 18:10:08,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:08,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:08,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:08,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:08,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:08,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:08,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 105 transitions, 571 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:08,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:08,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:08,378 INFO L129 PetriNetUnfolder]: 33/222 cut-off events. [2021-12-06 18:10:08,378 INFO L130 PetriNetUnfolder]: For 934/935 co-relation queries the response was YES. [2021-12-06 18:10:08,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 222 events. 33/222 cut-off events. For 934/935 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 752 event pairs, 3 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 868. Up to 36 conditions per place. [2021-12-06 18:10:08,380 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 39 selfloop transitions, 22 changer transitions 25/141 dead transitions. [2021-12-06 18:10:08,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 141 transitions, 1083 flow [2021-12-06 18:10:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:10:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 18:10:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2021-12-06 18:10:08,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6611519607843137 [2021-12-06 18:10:08,382 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2021-12-06 18:10:08,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2021-12-06 18:10:08,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:08,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2021-12-06 18:10:08,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.4375) internal successors, (1079), 16 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,384 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,384 INFO L186 Difference]: Start difference. First operand has 177 places, 105 transitions, 571 flow. Second operand 16 states and 1079 transitions. [2021-12-06 18:10:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 141 transitions, 1083 flow [2021-12-06 18:10:08,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 141 transitions, 936 flow, removed 48 selfloop flow, removed 17 redundant places. [2021-12-06 18:10:08,389 INFO L242 Difference]: Finished difference. Result has 171 places, 110 transitions, 620 flow [2021-12-06 18:10:08,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=620, PETRI_PLACES=171, PETRI_TRANSITIONS=110} [2021-12-06 18:10:08,390 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 80 predicate places. [2021-12-06 18:10:08,390 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 110 transitions, 620 flow [2021-12-06 18:10:08,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,390 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:08,390 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:08,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 18:10:08,391 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1628151802, now seen corresponding path program 16 times [2021-12-06 18:10:08,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:08,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844295410] [2021-12-06 18:10:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:08,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:08,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844295410] [2021-12-06 18:10:08,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844295410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:08,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:08,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:08,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160743652] [2021-12-06 18:10:08,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:08,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:08,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:08,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:08,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:08,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:08,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 110 transitions, 620 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:08,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:08,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:08,569 INFO L129 PetriNetUnfolder]: 24/192 cut-off events. [2021-12-06 18:10:08,569 INFO L130 PetriNetUnfolder]: For 544/545 co-relation queries the response was YES. [2021-12-06 18:10:08,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 192 events. 24/192 cut-off events. For 544/545 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 544 event pairs, 3 based on Foata normal form. 1/192 useless extension candidates. Maximal degree in co-relation 694. Up to 30 conditions per place. [2021-12-06 18:10:08,571 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 35 selfloop transitions, 10 changer transitions 30/130 dead transitions. [2021-12-06 18:10:08,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 130 transitions, 911 flow [2021-12-06 18:10:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1201 transitions. [2021-12-06 18:10:08,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541394335511983 [2021-12-06 18:10:08,572 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1201 transitions. [2021-12-06 18:10:08,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1201 transitions. [2021-12-06 18:10:08,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:08,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1201 transitions. [2021-12-06 18:10:08,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,574 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,574 INFO L186 Difference]: Start difference. First operand has 171 places, 110 transitions, 620 flow. Second operand 18 states and 1201 transitions. [2021-12-06 18:10:08,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 130 transitions, 911 flow [2021-12-06 18:10:08,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 130 transitions, 813 flow, removed 27 selfloop flow, removed 9 redundant places. [2021-12-06 18:10:08,579 INFO L242 Difference]: Finished difference. Result has 179 places, 95 transitions, 426 flow [2021-12-06 18:10:08,579 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=426, PETRI_PLACES=179, PETRI_TRANSITIONS=95} [2021-12-06 18:10:08,579 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 88 predicate places. [2021-12-06 18:10:08,580 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 95 transitions, 426 flow [2021-12-06 18:10:08,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:08,580 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:08,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 18:10:08,580 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:08,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:08,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1233211024, now seen corresponding path program 17 times [2021-12-06 18:10:08,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:08,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139415465] [2021-12-06 18:10:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:08,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:08,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139415465] [2021-12-06 18:10:08,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139415465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:08,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:08,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:08,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538562910] [2021-12-06 18:10:08,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:08,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:08,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:08,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:08,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 95 transitions, 426 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:08,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:08,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:08,777 INFO L129 PetriNetUnfolder]: 29/203 cut-off events. [2021-12-06 18:10:08,777 INFO L130 PetriNetUnfolder]: For 622/623 co-relation queries the response was YES. [2021-12-06 18:10:08,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 203 events. 29/203 cut-off events. For 622/623 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 612 event pairs, 4 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 725. Up to 30 conditions per place. [2021-12-06 18:10:08,779 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 20 changer transitions 23/131 dead transitions. [2021-12-06 18:10:08,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 131 transitions, 912 flow [2021-12-06 18:10:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1206 transitions. [2021-12-06 18:10:08,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2021-12-06 18:10:08,780 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1206 transitions. [2021-12-06 18:10:08,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1206 transitions. [2021-12-06 18:10:08,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:08,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1206 transitions. [2021-12-06 18:10:08,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,782 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,782 INFO L186 Difference]: Start difference. First operand has 179 places, 95 transitions, 426 flow. Second operand 18 states and 1206 transitions. [2021-12-06 18:10:08,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 131 transitions, 912 flow [2021-12-06 18:10:08,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 131 transitions, 766 flow, removed 25 selfloop flow, removed 18 redundant places. [2021-12-06 18:10:08,786 INFO L242 Difference]: Finished difference. Result has 164 places, 104 transitions, 537 flow [2021-12-06 18:10:08,786 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=537, PETRI_PLACES=164, PETRI_TRANSITIONS=104} [2021-12-06 18:10:08,787 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 73 predicate places. [2021-12-06 18:10:08,787 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 104 transitions, 537 flow [2021-12-06 18:10:08,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:08,787 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:08,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 18:10:08,787 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:08,787 INFO L85 PathProgramCache]: Analyzing trace with hash -693063326, now seen corresponding path program 18 times [2021-12-06 18:10:08,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:08,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717661659] [2021-12-06 18:10:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:08,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:08,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:08,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717661659] [2021-12-06 18:10:08,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717661659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:08,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:08,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:08,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529983060] [2021-12-06 18:10:08,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:08,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:08,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:08,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:08,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:08,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:08,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 104 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:08,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:08,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:08,964 INFO L129 PetriNetUnfolder]: 25/199 cut-off events. [2021-12-06 18:10:08,964 INFO L130 PetriNetUnfolder]: For 440/441 co-relation queries the response was YES. [2021-12-06 18:10:08,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 199 events. 25/199 cut-off events. For 440/441 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 586 event pairs, 0 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 680. Up to 30 conditions per place. [2021-12-06 18:10:08,965 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 34 selfloop transitions, 22 changer transitions 24/135 dead transitions. [2021-12-06 18:10:08,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 135 transitions, 959 flow [2021-12-06 18:10:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1142 transitions. [2021-12-06 18:10:08,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6585928489042676 [2021-12-06 18:10:08,967 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1142 transitions. [2021-12-06 18:10:08,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1142 transitions. [2021-12-06 18:10:08,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:08,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1142 transitions. [2021-12-06 18:10:08,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.17647058823529) internal successors, (1142), 17 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,969 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,969 INFO L186 Difference]: Start difference. First operand has 164 places, 104 transitions, 537 flow. Second operand 17 states and 1142 transitions. [2021-12-06 18:10:08,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 135 transitions, 959 flow [2021-12-06 18:10:08,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 135 transitions, 880 flow, removed 35 selfloop flow, removed 5 redundant places. [2021-12-06 18:10:08,976 INFO L242 Difference]: Finished difference. Result has 176 places, 108 transitions, 619 flow [2021-12-06 18:10:08,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=619, PETRI_PLACES=176, PETRI_TRANSITIONS=108} [2021-12-06 18:10:08,977 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 85 predicate places. [2021-12-06 18:10:08,977 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 108 transitions, 619 flow [2021-12-06 18:10:08,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:08,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:08,977 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:08,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-06 18:10:08,977 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1022511152, now seen corresponding path program 19 times [2021-12-06 18:10:08,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:08,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112712579] [2021-12-06 18:10:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:08,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:09,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:09,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112712579] [2021-12-06 18:10:09,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112712579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:09,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:09,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:09,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772905935] [2021-12-06 18:10:09,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:09,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:09,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:09,037 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:09,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 108 transitions, 619 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:09,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:09,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:09,155 INFO L129 PetriNetUnfolder]: 19/186 cut-off events. [2021-12-06 18:10:09,155 INFO L130 PetriNetUnfolder]: For 410/411 co-relation queries the response was YES. [2021-12-06 18:10:09,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 186 events. 19/186 cut-off events. For 410/411 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 498 event pairs, 0 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 641. Up to 30 conditions per place. [2021-12-06 18:10:09,157 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 12 changer transitions 29/129 dead transitions. [2021-12-06 18:10:09,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 129 transitions, 936 flow [2021-12-06 18:10:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:10:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:10:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1137 transitions. [2021-12-06 18:10:09,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6557093425605537 [2021-12-06 18:10:09,158 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1137 transitions. [2021-12-06 18:10:09,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1137 transitions. [2021-12-06 18:10:09,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:09,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1137 transitions. [2021-12-06 18:10:09,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.88235294117646) internal successors, (1137), 17 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,161 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,161 INFO L186 Difference]: Start difference. First operand has 176 places, 108 transitions, 619 flow. Second operand 17 states and 1137 transitions. [2021-12-06 18:10:09,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 129 transitions, 936 flow [2021-12-06 18:10:09,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 129 transitions, 845 flow, removed 25 selfloop flow, removed 9 redundant places. [2021-12-06 18:10:09,165 INFO L242 Difference]: Finished difference. Result has 182 places, 99 transitions, 480 flow [2021-12-06 18:10:09,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=480, PETRI_PLACES=182, PETRI_TRANSITIONS=99} [2021-12-06 18:10:09,166 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 91 predicate places. [2021-12-06 18:10:09,166 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 99 transitions, 480 flow [2021-12-06 18:10:09,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:10:09,166 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:09,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 18:10:09,166 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 18:10:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1634867008, now seen corresponding path program 20 times [2021-12-06 18:10:09,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:09,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47599600] [2021-12-06 18:10:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:09,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:09,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47599600] [2021-12-06 18:10:09,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47599600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:09,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:09,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:10:09,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588950697] [2021-12-06 18:10:09,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:09,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:10:09,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:10:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:10:09,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-06 18:10:09,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 99 transitions, 480 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:10:09,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-06 18:10:09,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:10:09,339 INFO L129 PetriNetUnfolder]: 11/120 cut-off events. [2021-12-06 18:10:09,339 INFO L130 PetriNetUnfolder]: For 228/229 co-relation queries the response was YES. [2021-12-06 18:10:09,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 120 events. 11/120 cut-off events. For 228/229 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 217 event pairs, 0 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 381. Up to 12 conditions per place. [2021-12-06 18:10:09,340 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 0 selfloop transitions, 0 changer transitions 88/88 dead transitions. [2021-12-06 18:10:09,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 88 transitions, 570 flow [2021-12-06 18:10:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:10:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:10:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1174 transitions. [2021-12-06 18:10:09,341 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6394335511982571 [2021-12-06 18:10:09,341 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1174 transitions. [2021-12-06 18:10:09,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1174 transitions. [2021-12-06 18:10:09,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:10:09,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1174 transitions. [2021-12-06 18:10:09,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.22222222222223) internal successors, (1174), 18 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,343 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,343 INFO L186 Difference]: Start difference. First operand has 182 places, 99 transitions, 480 flow. Second operand 18 states and 1174 transitions. [2021-12-06 18:10:09,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 88 transitions, 570 flow [2021-12-06 18:10:09,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 88 transitions, 466 flow, removed 21 selfloop flow, removed 22 redundant places. [2021-12-06 18:10:09,346 INFO L242 Difference]: Finished difference. Result has 146 places, 0 transitions, 0 flow [2021-12-06 18:10:09,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=146, PETRI_TRANSITIONS=0} [2021-12-06 18:10:09,346 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 55 predicate places. [2021-12-06 18:10:09,347 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 0 transitions, 0 flow [2021-12-06 18:10:09,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:10:09,348 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-06 18:10:09,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-06 18:10:09,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-06 18:10:09,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 18:10:09,351 INFO L732 BasicCegarLoop]: Path program histogram: [20, 20, 2, 2, 2, 1] [2021-12-06 18:10:09,353 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-06 18:10:09,353 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 18:10:09,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 06:10:09 BasicIcfg [2021-12-06 18:10:09,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 18:10:09,355 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 18:10:09,355 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 18:10:09,356 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 18:10:09,356 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:09:55" (3/4) ... [2021-12-06 18:10:09,358 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 18:10:09,362 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-06 18:10:09,362 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-06 18:10:09,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-12-06 18:10:09,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-06 18:10:09,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 18:10:09,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 18:10:09,387 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 18:10:09,387 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 18:10:09,388 INFO L158 Benchmark]: Toolchain (without parser) took 14158.71ms. Allocated memory was 96.5MB in the beginning and 172.0MB in the end (delta: 75.5MB). Free memory was 60.2MB in the beginning and 50.8MB in the end (delta: 9.4MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. [2021-12-06 18:10:09,388 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 96.5MB. Free memory was 76.5MB in the beginning and 76.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:10:09,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.41ms. Allocated memory is still 96.5MB. Free memory was 60.0MB in the beginning and 71.5MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 18:10:09,389 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.34ms. Allocated memory is still 96.5MB. Free memory was 71.5MB in the beginning and 70.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:10:09,389 INFO L158 Benchmark]: Boogie Preprocessor took 19.88ms. Allocated memory is still 96.5MB. Free memory was 70.1MB in the beginning and 69.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:10:09,389 INFO L158 Benchmark]: RCFGBuilder took 246.86ms. Allocated memory is still 96.5MB. Free memory was 69.0MB in the beginning and 57.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 18:10:09,389 INFO L158 Benchmark]: TraceAbstraction took 13642.98ms. Allocated memory was 96.5MB in the beginning and 172.0MB in the end (delta: 75.5MB). Free memory was 56.8MB in the beginning and 54.0MB in the end (delta: 2.8MB). Peak memory consumption was 80.1MB. Max. memory is 16.1GB. [2021-12-06 18:10:09,389 INFO L158 Benchmark]: Witness Printer took 32.12ms. Allocated memory is still 172.0MB. Free memory was 54.0MB in the beginning and 50.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:10:09,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 96.5MB. Free memory was 76.5MB in the beginning and 76.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.41ms. Allocated memory is still 96.5MB. Free memory was 60.0MB in the beginning and 71.5MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.34ms. Allocated memory is still 96.5MB. Free memory was 71.5MB in the beginning and 70.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.88ms. Allocated memory is still 96.5MB. Free memory was 70.1MB in the beginning and 69.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 246.86ms. Allocated memory is still 96.5MB. Free memory was 69.0MB in the beginning and 57.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13642.98ms. Allocated memory was 96.5MB in the beginning and 172.0MB in the end (delta: 75.5MB). Free memory was 56.8MB in the beginning and 54.0MB in the end (delta: 2.8MB). Peak memory consumption was 80.1MB. Max. memory is 16.1GB. * Witness Printer took 32.12ms. Allocated memory is still 172.0MB. Free memory was 54.0MB in the beginning and 50.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 69]: 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, 122 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.6s, OverallIterations: 47, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1860 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1860 mSDsluCounter, 9108 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8897 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7493 IncrementalHoareTripleChecker+Invalid, 7527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 1789 mSDtfsCounter, 7493 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1020 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 874 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1178occurred in iteration=17, InterpolantAutomatonStates: 803, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 3611 NumberOfCodeBlocks, 3611 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 3564 ConstructedInterpolants, 0 QuantifiedInterpolants, 12503 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 47 InterpolantComputations, 47 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! [2021-12-06 18:10:09,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5cef49-d718-47d3-9be3-9a9a4a06ef1b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE