./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy7.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy7.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL --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 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:04:38,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:04:38,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:04:38,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:04:38,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:04:38,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:04:38,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:04:38,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:04:38,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:04:38,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:04:38,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:04:38,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:04:38,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:04:38,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:04:38,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:04:38,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:04:38,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:04:38,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:04:38,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:04:38,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:04:38,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:04:38,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:04:38,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:04:38,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:04:38,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:04:38,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:04:38,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:04:38,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:04:38,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:04:38,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:04:38,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:04:38,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:04:38,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:04:38,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:04:38,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:04:38,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:04:38,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:04:38,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:04:38,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:04:38,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:04:38,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:04:38,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:04:38,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:04:38,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:04:38,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:04:38,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:04:38,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:04:38,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:04:38,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:04:38,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:04:38,854 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:04:38,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:04:38,855 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:04:38,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:04:38,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:04:38,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:04:38,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:04:38,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:04:38,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:04:38,857 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:04:38,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:04:38,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:04:38,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:04:38,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:04:38,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:04:38,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:04:38,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:04:38,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:04:38,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:04:38,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:04:38,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:04:38,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:04:38,860 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:04:38,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:04:38,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:04:38,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:04:38,861 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_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 [2021-11-19 05:04:39,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:04:39,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:04:39,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:04:39,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:04:39,196 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:04:39,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-11-19 05:04:39,274 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/data/cd84f24a1/6cbffc8af6bf4c418e43106c83e69574/FLAGfbb564557 [2021-11-19 05:04:39,836 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:04:39,839 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-11-19 05:04:39,856 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/data/cd84f24a1/6cbffc8af6bf4c418e43106c83e69574/FLAGfbb564557 [2021-11-19 05:04:40,162 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/data/cd84f24a1/6cbffc8af6bf4c418e43106c83e69574 [2021-11-19 05:04:40,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:04:40,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:04:40,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:04:40,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:04:40,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:04:40,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d40f37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40, skipping insertion in model container [2021-11-19 05:04:40,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:04:40,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:04:40,474 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_e1dc2946-616b-43eb-890b-354ab2cda876/sv-benchmarks/c/weaver/test-easy7.wvr.c[1872,1885] [2021-11-19 05:04:40,506 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:04:40,515 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:04:40,539 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_e1dc2946-616b-43eb-890b-354ab2cda876/sv-benchmarks/c/weaver/test-easy7.wvr.c[1872,1885] [2021-11-19 05:04:40,540 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:04:40,560 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:04:40,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40 WrapperNode [2021-11-19 05:04:40,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:04:40,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:04:40,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:04:40,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:04:40,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,618 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-11-19 05:04:40,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:04:40,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:04:40,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:04:40,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:04:40,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:04:40,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:04:40,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:04:40,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:04:40,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (1/1) ... [2021-11-19 05:04:40,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:04:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:04:40,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:04:40,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dc2946-616b-43eb-890b-354ab2cda876/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:04:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:04:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-19 05:04:40,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-19 05:04:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-19 05:04:40,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-19 05:04:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:04:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:04:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:04:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:04:40,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:04:40,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:04:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:04:40,801 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 05:04:40,925 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:04:40,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:04:41,113 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:04:41,123 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:04:41,124 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 05:04:41,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:41 BoogieIcfgContainer [2021-11-19 05:04:41,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:04:41,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:04:41,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:04:41,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:04:41,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:04:40" (1/3) ... [2021-11-19 05:04:41,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674079c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:41, skipping insertion in model container [2021-11-19 05:04:41,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:40" (2/3) ... [2021-11-19 05:04:41,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674079c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:41, skipping insertion in model container [2021-11-19 05:04:41,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:41" (3/3) ... [2021-11-19 05:04:41,136 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy7.wvr.c [2021-11-19 05:04:41,143 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 05:04:41,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:04:41,144 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:04:41,144 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 05:04:41,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,188 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,188 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,189 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,189 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,189 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,190 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,190 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,193 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,193 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,193 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,195 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,196 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,196 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,196 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,197 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,197 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,197 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,198 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,198 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,199 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,199 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,199 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,200 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,200 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,200 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,209 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,214 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,214 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,215 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,215 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,215 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,215 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:04:41,221 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-19 05:04:41,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:04:41,293 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 [2021-11-19 05:04:41,293 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 05:04:41,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 204 flow [2021-11-19 05:04:41,421 INFO L129 PetriNetUnfolder]: 2/92 cut-off events. [2021-11-19 05:04:41,422 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-19 05:04:41,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 2/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2021-11-19 05:04:41,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 204 flow [2021-11-19 05:04:41,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 83 transitions, 178 flow [2021-11-19 05:04:41,472 INFO L129 PetriNetUnfolder]: 2/82 cut-off events. [2021-11-19 05:04:41,473 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-19 05:04:41,473 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:04:41,474 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:41,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:04:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash 126118782, now seen corresponding path program 1 times [2021-11-19 05:04:41,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:41,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335555689] [2021-11-19 05:04:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:41,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:04:43,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:43,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335555689] [2021-11-19 05:04:43,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335555689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:43,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:43,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:04:43,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223674094] [2021-11-19 05:04:43,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:04:43,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:43,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:04:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:04:43,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:04:43,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 178 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:43,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:04:43,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:04:43,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:04:45,579 INFO L129 PetriNetUnfolder]: 179/513 cut-off events. [2021-11-19 05:04:45,579 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-11-19 05:04:45,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 513 events. 179/513 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2096 event pairs, 133 based on Foata normal form. 3/508 useless extension candidates. Maximal degree in co-relation 822. Up to 332 conditions per place. [2021-11-19 05:04:45,593 INFO L132 encePairwiseOnDemand]: 60/94 looper letters, 47 selfloop transitions, 28 changer transitions 34/148 dead transitions. [2021-11-19 05:04:45,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 535 flow [2021-11-19 05:04:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:04:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-19 05:04:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1583 transitions. [2021-11-19 05:04:45,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613475177304964 [2021-11-19 05:04:45,639 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1583 transitions. [2021-11-19 05:04:45,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1583 transitions. [2021-11-19 05:04:45,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:04:45,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1583 transitions. [2021-11-19 05:04:45,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.766666666666666) internal successors, (1583), 30 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:45,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:45,682 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:45,684 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 178 flow. Second operand 30 states and 1583 transitions. [2021-11-19 05:04:45,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 535 flow [2021-11-19 05:04:45,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 521 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-19 05:04:45,695 INFO L242 Difference]: Finished difference. Result has 136 places, 103 transitions, 360 flow [2021-11-19 05:04:45,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=360, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2021-11-19 05:04:45,703 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 48 predicate places. [2021-11-19 05:04:45,703 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 360 flow [2021-11-19 05:04:45,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:45,705 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:04:45,705 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, 1, 1] [2021-11-19 05:04:45,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:04:45,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:04:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1479619674, now seen corresponding path program 2 times [2021-11-19 05:04:45,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:45,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650991558] [2021-11-19 05:04:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:45,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:04:46,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:46,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650991558] [2021-11-19 05:04:46,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650991558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:46,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:46,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:04:46,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394293274] [2021-11-19 05:04:46,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:46,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:04:46,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:04:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:04:46,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:04:46,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 360 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:46,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:04:46,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:04:46,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:04:48,237 INFO L129 PetriNetUnfolder]: 202/559 cut-off events. [2021-11-19 05:04:48,238 INFO L130 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2021-11-19 05:04:48,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 559 events. 202/559 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2482 event pairs, 22 based on Foata normal form. 1/558 useless extension candidates. Maximal degree in co-relation 1515. Up to 329 conditions per place. [2021-11-19 05:04:48,248 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 82 selfloop transitions, 42 changer transitions 36/199 dead transitions. [2021-11-19 05:04:48,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 1049 flow [2021-11-19 05:04:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 05:04:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-19 05:04:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1561 transitions. [2021-11-19 05:04:48,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5726338958180485 [2021-11-19 05:04:48,258 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1561 transitions. [2021-11-19 05:04:48,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1561 transitions. [2021-11-19 05:04:48,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:04:48,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1561 transitions. [2021-11-19 05:04:48,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:48,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:48,278 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:48,278 INFO L186 Difference]: Start difference. First operand has 136 places, 103 transitions, 360 flow. Second operand 29 states and 1561 transitions. [2021-11-19 05:04:48,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 1049 flow [2021-11-19 05:04:48,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 955 flow, removed 38 selfloop flow, removed 13 redundant places. [2021-11-19 05:04:48,295 INFO L242 Difference]: Finished difference. Result has 156 places, 139 transitions, 637 flow [2021-11-19 05:04:48,296 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=637, PETRI_PLACES=156, PETRI_TRANSITIONS=139} [2021-11-19 05:04:48,297 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 68 predicate places. [2021-11-19 05:04:48,297 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 139 transitions, 637 flow [2021-11-19 05:04:48,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:48,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:04:48,299 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:04:48,300 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:04:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1215992582, now seen corresponding path program 3 times [2021-11-19 05:04:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:48,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782419087] [2021-11-19 05:04:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:48,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:04:49,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:49,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782419087] [2021-11-19 05:04:49,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782419087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:49,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:49,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:04:49,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635049107] [2021-11-19 05:04:49,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:49,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:04:49,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:04:49,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:04:49,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:04:49,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 139 transitions, 637 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:49,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:04:49,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:04:49,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:04:51,415 INFO L129 PetriNetUnfolder]: 240/651 cut-off events. [2021-11-19 05:04:51,415 INFO L130 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2021-11-19 05:04:51,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 651 events. 240/651 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3070 event pairs, 42 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 2226. Up to 401 conditions per place. [2021-11-19 05:04:51,427 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 102 selfloop transitions, 56 changer transitions 43/240 dead transitions. [2021-11-19 05:04:51,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 240 transitions, 1595 flow [2021-11-19 05:04:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:04:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:04:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2062 transitions. [2021-11-19 05:04:51,437 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624659028914348 [2021-11-19 05:04:51,437 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2062 transitions. [2021-11-19 05:04:51,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2062 transitions. [2021-11-19 05:04:51,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:04:51,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2062 transitions. [2021-11-19 05:04:51,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.87179487179487) internal successors, (2062), 39 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:51,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:51,458 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:51,459 INFO L186 Difference]: Start difference. First operand has 156 places, 139 transitions, 637 flow. Second operand 39 states and 2062 transitions. [2021-11-19 05:04:51,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 240 transitions, 1595 flow [2021-11-19 05:04:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 1454 flow, removed 66 selfloop flow, removed 11 redundant places. [2021-11-19 05:04:51,479 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 1065 flow [2021-11-19 05:04:51,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1065, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2021-11-19 05:04:51,481 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 113 predicate places. [2021-11-19 05:04:51,481 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 1065 flow [2021-11-19 05:04:51,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:51,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:04:51,501 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:51,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:04:51,502 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:04:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1665333946, now seen corresponding path program 4 times [2021-11-19 05:04:51,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:51,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174987563] [2021-11-19 05:04:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:51,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:04:52,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:52,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174987563] [2021-11-19 05:04:52,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174987563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:52,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:52,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:04:52,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415285480] [2021-11-19 05:04:52,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:52,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:04:52,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:52,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:04:52,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:04:52,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:04:52,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 1065 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:52,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:04:52,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:04:52,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:04:54,330 INFO L129 PetriNetUnfolder]: 238/637 cut-off events. [2021-11-19 05:04:54,331 INFO L130 PetriNetUnfolder]: For 1491/1491 co-relation queries the response was YES. [2021-11-19 05:04:54,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 637 events. 238/637 cut-off events. For 1491/1491 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2989 event pairs, 3 based on Foata normal form. 1/637 useless extension candidates. Maximal degree in co-relation 2564. Up to 403 conditions per place. [2021-11-19 05:04:54,346 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 111 selfloop transitions, 53 changer transitions 44/247 dead transitions. [2021-11-19 05:04:54,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 247 transitions, 1855 flow [2021-11-19 05:04:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 05:04:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-19 05:04:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1502 transitions. [2021-11-19 05:04:54,355 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5706686930091185 [2021-11-19 05:04:54,355 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1502 transitions. [2021-11-19 05:04:54,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1502 transitions. [2021-11-19 05:04:54,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:04:54,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1502 transitions. [2021-11-19 05:04:54,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 53.642857142857146) internal successors, (1502), 28 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:54,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:54,374 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:54,375 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 1065 flow. Second operand 28 states and 1502 transitions. [2021-11-19 05:04:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 247 transitions, 1855 flow [2021-11-19 05:04:54,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 247 transitions, 1633 flow, removed 89 selfloop flow, removed 18 redundant places. [2021-11-19 05:04:54,407 INFO L242 Difference]: Finished difference. Result has 213 places, 187 transitions, 1114 flow [2021-11-19 05:04:54,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1114, PETRI_PLACES=213, PETRI_TRANSITIONS=187} [2021-11-19 05:04:54,409 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 125 predicate places. [2021-11-19 05:04:54,410 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 187 transitions, 1114 flow [2021-11-19 05:04:54,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:54,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:04:54,411 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:54,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:04:54,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:04:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash 699227332, now seen corresponding path program 5 times [2021-11-19 05:04:54,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:54,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73428979] [2021-11-19 05:04:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:54,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:04:55,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:55,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73428979] [2021-11-19 05:04:55,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73428979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:55,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:55,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:04:55,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511789274] [2021-11-19 05:04:55,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:04:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:04:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:04:55,172 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:04:55,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 187 transitions, 1114 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:55,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:04:55,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:04:55,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:04:57,448 INFO L129 PetriNetUnfolder]: 261/695 cut-off events. [2021-11-19 05:04:57,448 INFO L130 PetriNetUnfolder]: For 1977/1977 co-relation queries the response was YES. [2021-11-19 05:04:57,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 695 events. 261/695 cut-off events. For 1977/1977 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3342 event pairs, 20 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 2932. Up to 446 conditions per place. [2021-11-19 05:04:57,469 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 131 selfloop transitions, 61 changer transitions 43/274 dead transitions. [2021-11-19 05:04:57,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 274 transitions, 2242 flow [2021-11-19 05:04:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:04:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:04:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-11-19 05:04:57,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-11-19 05:04:57,476 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-11-19 05:04:57,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-11-19 05:04:57,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:04:57,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-11-19 05:04:57,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:57,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:57,502 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:57,503 INFO L186 Difference]: Start difference. First operand has 213 places, 187 transitions, 1114 flow. Second operand 35 states and 1861 transitions. [2021-11-19 05:04:57,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 274 transitions, 2242 flow [2021-11-19 05:04:57,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 274 transitions, 1993 flow, removed 66 selfloop flow, removed 24 redundant places. [2021-11-19 05:04:57,530 INFO L242 Difference]: Finished difference. Result has 234 places, 215 transitions, 1438 flow [2021-11-19 05:04:57,531 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1438, PETRI_PLACES=234, PETRI_TRANSITIONS=215} [2021-11-19 05:04:57,536 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 146 predicate places. [2021-11-19 05:04:57,536 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 215 transitions, 1438 flow [2021-11-19 05:04:57,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:57,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:04:57,540 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:57,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:04:57,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:04:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:57,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1519473010, now seen corresponding path program 6 times [2021-11-19 05:04:57,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:57,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447539547] [2021-11-19 05:04:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:57,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:04:58,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:58,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447539547] [2021-11-19 05:04:58,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447539547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:58,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:58,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:04:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010586309] [2021-11-19 05:04:58,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:58,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:04:58,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:04:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:04:58,368 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:04:58,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 215 transitions, 1438 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:04:58,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:04:58,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:04:58,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:00,447 INFO L129 PetriNetUnfolder]: 265/703 cut-off events. [2021-11-19 05:05:00,447 INFO L130 PetriNetUnfolder]: For 2379/2379 co-relation queries the response was YES. [2021-11-19 05:05:00,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 703 events. 265/703 cut-off events. For 2379/2379 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3416 event pairs, 19 based on Foata normal form. 1/702 useless extension candidates. Maximal degree in co-relation 3094. Up to 459 conditions per place. [2021-11-19 05:05:00,466 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 74 changer transitions 43/282 dead transitions. [2021-11-19 05:05:00,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 282 transitions, 2337 flow [2021-11-19 05:05:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:05:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:05:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1657 transitions. [2021-11-19 05:05:00,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5686341798215512 [2021-11-19 05:05:00,497 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1657 transitions. [2021-11-19 05:05:00,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1657 transitions. [2021-11-19 05:05:00,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:00,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1657 transitions. [2021-11-19 05:05:00,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.45161290322581) internal successors, (1657), 31 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:00,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:00,518 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:00,518 INFO L186 Difference]: Start difference. First operand has 234 places, 215 transitions, 1438 flow. Second operand 31 states and 1657 transitions. [2021-11-19 05:05:00,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 282 transitions, 2337 flow [2021-11-19 05:05:00,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 282 transitions, 2057 flow, removed 109 selfloop flow, removed 23 redundant places. [2021-11-19 05:05:00,554 INFO L242 Difference]: Finished difference. Result has 245 places, 224 transitions, 1536 flow [2021-11-19 05:05:00,554 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1536, PETRI_PLACES=245, PETRI_TRANSITIONS=224} [2021-11-19 05:05:00,558 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 157 predicate places. [2021-11-19 05:05:00,559 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 224 transitions, 1536 flow [2021-11-19 05:05:00,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:00,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:00,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:00,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:05:00,561 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1201914780, now seen corresponding path program 7 times [2021-11-19 05:05:00,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:00,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064646162] [2021-11-19 05:05:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:00,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:01,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:01,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064646162] [2021-11-19 05:05:01,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064646162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:01,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:01,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:01,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020184004] [2021-11-19 05:05:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:01,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:01,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:01,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:01,145 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:01,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 224 transitions, 1536 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:01,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:01,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:01,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:03,117 INFO L129 PetriNetUnfolder]: 264/744 cut-off events. [2021-11-19 05:05:03,117 INFO L130 PetriNetUnfolder]: For 2495/2495 co-relation queries the response was YES. [2021-11-19 05:05:03,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 744 events. 264/744 cut-off events. For 2495/2495 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3693 event pairs, 27 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3200. Up to 448 conditions per place. [2021-11-19 05:05:03,136 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 124 selfloop transitions, 76 changer transitions 44/283 dead transitions. [2021-11-19 05:05:03,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 283 transitions, 2405 flow [2021-11-19 05:05:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:05:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:05:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-11-19 05:05:03,142 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-11-19 05:05:03,142 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-11-19 05:05:03,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-11-19 05:05:03,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:03,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-11-19 05:05:03,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:03,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:03,158 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:03,159 INFO L186 Difference]: Start difference. First operand has 245 places, 224 transitions, 1536 flow. Second operand 31 states and 1658 transitions. [2021-11-19 05:05:03,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 283 transitions, 2405 flow [2021-11-19 05:05:03,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 283 transitions, 2194 flow, removed 48 selfloop flow, removed 26 redundant places. [2021-11-19 05:05:03,195 INFO L242 Difference]: Finished difference. Result has 255 places, 224 transitions, 1617 flow [2021-11-19 05:05:03,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1617, PETRI_PLACES=255, PETRI_TRANSITIONS=224} [2021-11-19 05:05:03,197 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 167 predicate places. [2021-11-19 05:05:03,197 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 224 transitions, 1617 flow [2021-11-19 05:05:03,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:03,199 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:03,199 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:03,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 05:05:03,200 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1783083334, now seen corresponding path program 8 times [2021-11-19 05:05:03,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:03,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016588989] [2021-11-19 05:05:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:03,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:03,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:03,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016588989] [2021-11-19 05:05:03,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016588989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:03,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:03,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:03,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782036283] [2021-11-19 05:05:03,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:03,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:03,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:03,888 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:03,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 224 transitions, 1617 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:03,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:03,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:03,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:05,750 INFO L129 PetriNetUnfolder]: 260/739 cut-off events. [2021-11-19 05:05:05,750 INFO L130 PetriNetUnfolder]: For 2601/2601 co-relation queries the response was YES. [2021-11-19 05:05:05,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3344 conditions, 739 events. 260/739 cut-off events. For 2601/2601 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3694 event pairs, 33 based on Foata normal form. 1/738 useless extension candidates. Maximal degree in co-relation 3265. Up to 456 conditions per place. [2021-11-19 05:05:05,768 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 73 changer transitions 39/277 dead transitions. [2021-11-19 05:05:05,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 277 transitions, 2429 flow [2021-11-19 05:05:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:05:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-19 05:05:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1603 transitions. [2021-11-19 05:05:05,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5684397163120567 [2021-11-19 05:05:05,773 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1603 transitions. [2021-11-19 05:05:05,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1603 transitions. [2021-11-19 05:05:05,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:05,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1603 transitions. [2021-11-19 05:05:05,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.43333333333333) internal successors, (1603), 30 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:05,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:05,789 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:05,789 INFO L186 Difference]: Start difference. First operand has 255 places, 224 transitions, 1617 flow. Second operand 30 states and 1603 transitions. [2021-11-19 05:05:05,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 277 transitions, 2429 flow [2021-11-19 05:05:05,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 277 transitions, 2192 flow, removed 35 selfloop flow, removed 29 redundant places. [2021-11-19 05:05:05,826 INFO L242 Difference]: Finished difference. Result has 256 places, 223 transitions, 1629 flow [2021-11-19 05:05:05,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1629, PETRI_PLACES=256, PETRI_TRANSITIONS=223} [2021-11-19 05:05:05,828 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-11-19 05:05:05,828 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 223 transitions, 1629 flow [2021-11-19 05:05:05,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:05,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:05,829 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:05,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 05:05:05,830 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:05,831 INFO L85 PathProgramCache]: Analyzing trace with hash -944030314, now seen corresponding path program 9 times [2021-11-19 05:05:05,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:05,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979852394] [2021-11-19 05:05:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:05,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:06,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:06,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979852394] [2021-11-19 05:05:06,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979852394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:06,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:06,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:05:06,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123968146] [2021-11-19 05:05:06,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:06,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:05:06,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:05:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:05:06,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:06,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 223 transitions, 1629 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:06,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:06,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:06,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:09,613 INFO L129 PetriNetUnfolder]: 261/726 cut-off events. [2021-11-19 05:05:09,613 INFO L130 PetriNetUnfolder]: For 2958/2958 co-relation queries the response was YES. [2021-11-19 05:05:09,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3403 conditions, 726 events. 261/726 cut-off events. For 2958/2958 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3615 event pairs, 28 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 3326. Up to 460 conditions per place. [2021-11-19 05:05:09,630 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 129 selfloop transitions, 94 changer transitions 29/291 dead transitions. [2021-11-19 05:05:09,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 291 transitions, 2637 flow [2021-11-19 05:05:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 05:05:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-19 05:05:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2205 transitions. [2021-11-19 05:05:09,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-11-19 05:05:09,636 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2205 transitions. [2021-11-19 05:05:09,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2205 transitions. [2021-11-19 05:05:09,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:09,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2205 transitions. [2021-11-19 05:05:09,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.5) internal successors, (2205), 42 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:09,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:09,657 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:09,657 INFO L186 Difference]: Start difference. First operand has 256 places, 223 transitions, 1629 flow. Second operand 42 states and 2205 transitions. [2021-11-19 05:05:09,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 291 transitions, 2637 flow [2021-11-19 05:05:09,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 291 transitions, 2381 flow, removed 68 selfloop flow, removed 28 redundant places. [2021-11-19 05:05:09,699 INFO L242 Difference]: Finished difference. Result has 273 places, 244 transitions, 1891 flow [2021-11-19 05:05:09,699 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1891, PETRI_PLACES=273, PETRI_TRANSITIONS=244} [2021-11-19 05:05:09,700 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 185 predicate places. [2021-11-19 05:05:09,701 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 244 transitions, 1891 flow [2021-11-19 05:05:09,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:09,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:09,703 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:09,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 05:05:09,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash -984614164, now seen corresponding path program 10 times [2021-11-19 05:05:09,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:09,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902881941] [2021-11-19 05:05:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:09,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:10,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:10,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902881941] [2021-11-19 05:05:10,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902881941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:10,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:10,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:05:10,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115592109] [2021-11-19 05:05:10,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:10,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:05:10,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:05:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:05:10,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:10,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 244 transitions, 1891 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:10,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:10,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:10,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:12,320 INFO L129 PetriNetUnfolder]: 261/745 cut-off events. [2021-11-19 05:05:12,320 INFO L130 PetriNetUnfolder]: For 3271/3271 co-relation queries the response was YES. [2021-11-19 05:05:12,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 745 events. 261/745 cut-off events. For 3271/3271 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3789 event pairs, 30 based on Foata normal form. 1/744 useless extension candidates. Maximal degree in co-relation 3521. Up to 477 conditions per place. [2021-11-19 05:05:12,338 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 78 changer transitions 32/287 dead transitions. [2021-11-19 05:05:12,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 287 transitions, 2626 flow [2021-11-19 05:05:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:05:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:05:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2021-11-19 05:05:12,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2021-11-19 05:05:12,343 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2021-11-19 05:05:12,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2021-11-19 05:05:12,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:12,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2021-11-19 05:05:12,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:12,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:12,397 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:12,397 INFO L186 Difference]: Start difference. First operand has 273 places, 244 transitions, 1891 flow. Second operand 33 states and 1745 transitions. [2021-11-19 05:05:12,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 287 transitions, 2626 flow [2021-11-19 05:05:12,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 287 transitions, 2308 flow, removed 96 selfloop flow, removed 27 redundant places. [2021-11-19 05:05:12,442 INFO L242 Difference]: Finished difference. Result has 280 places, 241 transitions, 1804 flow [2021-11-19 05:05:12,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1804, PETRI_PLACES=280, PETRI_TRANSITIONS=241} [2021-11-19 05:05:12,445 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 192 predicate places. [2021-11-19 05:05:12,446 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 241 transitions, 1804 flow [2021-11-19 05:05:12,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:12,447 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:12,447 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:12,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:05:12,448 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:12,449 INFO L85 PathProgramCache]: Analyzing trace with hash 531479520, now seen corresponding path program 11 times [2021-11-19 05:05:12,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:12,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954871523] [2021-11-19 05:05:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:12,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:13,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:13,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954871523] [2021-11-19 05:05:13,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954871523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:13,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:13,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:05:13,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616701457] [2021-11-19 05:05:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:13,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:05:13,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:05:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:05:13,193 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:13,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 241 transitions, 1804 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:13,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:13,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:13,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:16,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:05:16,898 INFO L129 PetriNetUnfolder]: 251/709 cut-off events. [2021-11-19 05:05:16,899 INFO L130 PetriNetUnfolder]: For 2910/2910 co-relation queries the response was YES. [2021-11-19 05:05:16,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3439 conditions, 709 events. 251/709 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3481 event pairs, 22 based on Foata normal form. 1/709 useless extension candidates. Maximal degree in co-relation 3355. Up to 465 conditions per place. [2021-11-19 05:05:16,916 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 134 selfloop transitions, 75 changer transitions 26/274 dead transitions. [2021-11-19 05:05:16,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 274 transitions, 2427 flow [2021-11-19 05:05:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:05:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:05:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-11-19 05:05:16,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-11-19 05:05:16,922 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-11-19 05:05:16,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-11-19 05:05:16,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:16,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-11-19 05:05:16,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:16,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:16,933 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:16,934 INFO L186 Difference]: Start difference. First operand has 280 places, 241 transitions, 1804 flow. Second operand 31 states and 1639 transitions. [2021-11-19 05:05:16,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 274 transitions, 2427 flow [2021-11-19 05:05:16,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 274 transitions, 2189 flow, removed 25 selfloop flow, removed 33 redundant places. [2021-11-19 05:05:16,976 INFO L242 Difference]: Finished difference. Result has 274 places, 234 transitions, 1729 flow [2021-11-19 05:05:16,977 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1729, PETRI_PLACES=274, PETRI_TRANSITIONS=234} [2021-11-19 05:05:16,979 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 186 predicate places. [2021-11-19 05:05:16,979 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 234 transitions, 1729 flow [2021-11-19 05:05:16,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:16,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:16,980 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:16,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 05:05:16,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash -94536446, now seen corresponding path program 12 times [2021-11-19 05:05:16,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:16,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731470754] [2021-11-19 05:05:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:16,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:17,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:17,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731470754] [2021-11-19 05:05:17,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731470754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:17,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:17,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:05:17,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468353523] [2021-11-19 05:05:17,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:17,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:05:17,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:17,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:05:17,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:05:17,693 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:17,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 234 transitions, 1729 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:17,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:17,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:17,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:20,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:05:21,527 INFO L129 PetriNetUnfolder]: 244/701 cut-off events. [2021-11-19 05:05:21,527 INFO L130 PetriNetUnfolder]: For 2598/2598 co-relation queries the response was YES. [2021-11-19 05:05:21,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3294 conditions, 701 events. 244/701 cut-off events. For 2598/2598 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3370 event pairs, 26 based on Foata normal form. 1/701 useless extension candidates. Maximal degree in co-relation 3213. Up to 460 conditions per place. [2021-11-19 05:05:21,543 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 130 selfloop transitions, 75 changer transitions 19/263 dead transitions. [2021-11-19 05:05:21,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 263 transitions, 2301 flow [2021-11-19 05:05:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:05:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:05:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1682 transitions. [2021-11-19 05:05:21,553 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5591755319148937 [2021-11-19 05:05:21,553 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1682 transitions. [2021-11-19 05:05:21,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1682 transitions. [2021-11-19 05:05:21,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:21,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1682 transitions. [2021-11-19 05:05:21,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.5625) internal successors, (1682), 32 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:21,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:21,568 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:21,568 INFO L186 Difference]: Start difference. First operand has 274 places, 234 transitions, 1729 flow. Second operand 32 states and 1682 transitions. [2021-11-19 05:05:21,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 263 transitions, 2301 flow [2021-11-19 05:05:21,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 263 transitions, 2097 flow, removed 17 selfloop flow, removed 33 redundant places. [2021-11-19 05:05:21,607 INFO L242 Difference]: Finished difference. Result has 268 places, 231 transitions, 1698 flow [2021-11-19 05:05:21,608 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1698, PETRI_PLACES=268, PETRI_TRANSITIONS=231} [2021-11-19 05:05:21,611 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 180 predicate places. [2021-11-19 05:05:21,612 INFO L470 AbstractCegarLoop]: Abstraction has has 268 places, 231 transitions, 1698 flow [2021-11-19 05:05:21,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:21,613 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:21,613 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:21,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 05:05:21,613 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:21,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1360263200, now seen corresponding path program 13 times [2021-11-19 05:05:21,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:21,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202536758] [2021-11-19 05:05:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:21,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:22,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:22,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202536758] [2021-11-19 05:05:22,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202536758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:22,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:22,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:05:22,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272031722] [2021-11-19 05:05:22,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:22,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:05:22,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:05:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:05:22,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:22,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 231 transitions, 1698 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:22,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:22,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:22,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:24,274 INFO L129 PetriNetUnfolder]: 238/682 cut-off events. [2021-11-19 05:05:24,274 INFO L130 PetriNetUnfolder]: For 2347/2347 co-relation queries the response was YES. [2021-11-19 05:05:24,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3176 conditions, 682 events. 238/682 cut-off events. For 2347/2347 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3213 event pairs, 29 based on Foata normal form. 1/680 useless extension candidates. Maximal degree in co-relation 3099. Up to 452 conditions per place. [2021-11-19 05:05:24,288 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 123 selfloop transitions, 65 changer transitions 26/253 dead transitions. [2021-11-19 05:05:24,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 253 transitions, 2223 flow [2021-11-19 05:05:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:05:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:05:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1677 transitions. [2021-11-19 05:05:24,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5575132978723404 [2021-11-19 05:05:24,293 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1677 transitions. [2021-11-19 05:05:24,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1677 transitions. [2021-11-19 05:05:24,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:24,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1677 transitions. [2021-11-19 05:05:24,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.40625) internal successors, (1677), 32 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:24,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:24,306 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:24,306 INFO L186 Difference]: Start difference. First operand has 268 places, 231 transitions, 1698 flow. Second operand 32 states and 1677 transitions. [2021-11-19 05:05:24,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 253 transitions, 2223 flow [2021-11-19 05:05:24,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 2037 flow, removed 9 selfloop flow, removed 32 redundant places. [2021-11-19 05:05:24,371 INFO L242 Difference]: Finished difference. Result has 264 places, 215 transitions, 1558 flow [2021-11-19 05:05:24,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1558, PETRI_PLACES=264, PETRI_TRANSITIONS=215} [2021-11-19 05:05:24,373 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 176 predicate places. [2021-11-19 05:05:24,373 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 215 transitions, 1558 flow [2021-11-19 05:05:24,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:24,374 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:24,374 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:24,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 05:05:24,375 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:24,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1448759122, now seen corresponding path program 14 times [2021-11-19 05:05:24,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:24,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508771403] [2021-11-19 05:05:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:24,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:25,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:25,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508771403] [2021-11-19 05:05:25,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508771403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:25,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:25,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:05:25,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984676268] [2021-11-19 05:05:25,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:25,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:05:25,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:25,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:05:25,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:05:25,014 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:25,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 215 transitions, 1558 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:25,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:25,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:25,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:26,779 INFO L129 PetriNetUnfolder]: 260/742 cut-off events. [2021-11-19 05:05:26,780 INFO L130 PetriNetUnfolder]: For 2561/2561 co-relation queries the response was YES. [2021-11-19 05:05:26,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3359 conditions, 742 events. 260/742 cut-off events. For 2561/2561 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3696 event pairs, 37 based on Foata normal form. 1/740 useless extension candidates. Maximal degree in co-relation 3284. Up to 436 conditions per place. [2021-11-19 05:05:26,794 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 83 changer transitions 42/284 dead transitions. [2021-11-19 05:05:26,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 284 transitions, 2512 flow [2021-11-19 05:05:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:05:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:05:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-11-19 05:05:26,798 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-11-19 05:05:26,798 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-11-19 05:05:26,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-11-19 05:05:26,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:26,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-11-19 05:05:26,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:26,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:26,808 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:26,808 INFO L186 Difference]: Start difference. First operand has 264 places, 215 transitions, 1558 flow. Second operand 35 states and 1861 transitions. [2021-11-19 05:05:26,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 284 transitions, 2512 flow [2021-11-19 05:05:26,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 284 transitions, 2221 flow, removed 45 selfloop flow, removed 29 redundant places. [2021-11-19 05:05:26,837 INFO L242 Difference]: Finished difference. Result has 256 places, 224 transitions, 1654 flow [2021-11-19 05:05:26,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1654, PETRI_PLACES=256, PETRI_TRANSITIONS=224} [2021-11-19 05:05:26,838 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-11-19 05:05:26,839 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 224 transitions, 1654 flow [2021-11-19 05:05:26,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:26,839 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:26,840 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:26,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 05:05:26,840 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:26,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1202690204, now seen corresponding path program 15 times [2021-11-19 05:05:26,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:26,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139994205] [2021-11-19 05:05:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:26,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:27,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:27,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139994205] [2021-11-19 05:05:27,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139994205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:27,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:27,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:27,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888372688] [2021-11-19 05:05:27,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:27,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:27,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:27,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:27,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:27,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:27,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 224 transitions, 1654 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:27,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:27,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:27,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:29,132 INFO L129 PetriNetUnfolder]: 272/761 cut-off events. [2021-11-19 05:05:29,132 INFO L130 PetriNetUnfolder]: For 3733/3733 co-relation queries the response was YES. [2021-11-19 05:05:29,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3672 conditions, 761 events. 272/761 cut-off events. For 3733/3733 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3711 event pairs, 24 based on Foata normal form. 1/759 useless extension candidates. Maximal degree in co-relation 3595. Up to 458 conditions per place. [2021-11-19 05:05:29,149 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 101 changer transitions 22/300 dead transitions. [2021-11-19 05:05:29,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 300 transitions, 2850 flow [2021-11-19 05:05:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:05:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:05:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1818 transitions. [2021-11-19 05:05:29,154 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5688360450563203 [2021-11-19 05:05:29,154 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1818 transitions. [2021-11-19 05:05:29,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1818 transitions. [2021-11-19 05:05:29,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:29,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1818 transitions. [2021-11-19 05:05:29,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.470588235294116) internal successors, (1818), 34 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:29,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:29,166 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:29,167 INFO L186 Difference]: Start difference. First operand has 256 places, 224 transitions, 1654 flow. Second operand 34 states and 1818 transitions. [2021-11-19 05:05:29,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 300 transitions, 2850 flow [2021-11-19 05:05:29,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 300 transitions, 2572 flow, removed 73 selfloop flow, removed 29 redundant places. [2021-11-19 05:05:29,210 INFO L242 Difference]: Finished difference. Result has 260 places, 251 transitions, 2016 flow [2021-11-19 05:05:29,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2016, PETRI_PLACES=260, PETRI_TRANSITIONS=251} [2021-11-19 05:05:29,212 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 172 predicate places. [2021-11-19 05:05:29,212 INFO L470 AbstractCegarLoop]: Abstraction has has 260 places, 251 transitions, 2016 flow [2021-11-19 05:05:29,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:29,213 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:29,213 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:29,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 05:05:29,214 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2040644658, now seen corresponding path program 16 times [2021-11-19 05:05:29,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:29,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839774228] [2021-11-19 05:05:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:29,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:29,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:29,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839774228] [2021-11-19 05:05:29,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839774228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:29,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:29,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:05:29,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873990021] [2021-11-19 05:05:29,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:29,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:05:29,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:05:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:05:29,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:29,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 251 transitions, 2016 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:29,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:29,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:29,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:31,342 INFO L129 PetriNetUnfolder]: 280/785 cut-off events. [2021-11-19 05:05:31,342 INFO L130 PetriNetUnfolder]: For 3938/3938 co-relation queries the response was YES. [2021-11-19 05:05:31,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 785 events. 280/785 cut-off events. For 3938/3938 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3937 event pairs, 25 based on Foata normal form. 1/783 useless extension candidates. Maximal degree in co-relation 3839. Up to 487 conditions per place. [2021-11-19 05:05:31,361 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 89 changer transitions 29/308 dead transitions. [2021-11-19 05:05:31,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 308 transitions, 3040 flow [2021-11-19 05:05:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 05:05:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-19 05:05:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1560 transitions. [2021-11-19 05:05:31,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5722670579603815 [2021-11-19 05:05:31,366 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1560 transitions. [2021-11-19 05:05:31,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1560 transitions. [2021-11-19 05:05:31,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:31,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1560 transitions. [2021-11-19 05:05:31,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.793103448275865) internal successors, (1560), 29 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:31,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:31,378 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:31,379 INFO L186 Difference]: Start difference. First operand has 260 places, 251 transitions, 2016 flow. Second operand 29 states and 1560 transitions. [2021-11-19 05:05:31,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 308 transitions, 3040 flow [2021-11-19 05:05:31,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 308 transitions, 2719 flow, removed 122 selfloop flow, removed 14 redundant places. [2021-11-19 05:05:31,429 INFO L242 Difference]: Finished difference. Result has 278 places, 259 transitions, 2077 flow [2021-11-19 05:05:31,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2077, PETRI_PLACES=278, PETRI_TRANSITIONS=259} [2021-11-19 05:05:31,432 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 190 predicate places. [2021-11-19 05:05:31,432 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 259 transitions, 2077 flow [2021-11-19 05:05:31,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:31,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:31,433 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:31,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 05:05:31,434 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash -347736914, now seen corresponding path program 17 times [2021-11-19 05:05:31,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:31,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640185029] [2021-11-19 05:05:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:31,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:32,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:32,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640185029] [2021-11-19 05:05:32,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640185029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:32,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:32,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:32,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220095327] [2021-11-19 05:05:32,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:32,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:32,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:32,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:32,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 259 transitions, 2077 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:32,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:32,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:32,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:33,718 INFO L129 PetriNetUnfolder]: 278/781 cut-off events. [2021-11-19 05:05:33,719 INFO L130 PetriNetUnfolder]: For 4196/4196 co-relation queries the response was YES. [2021-11-19 05:05:33,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 781 events. 278/781 cut-off events. For 4196/4196 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3905 event pairs, 25 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 3911. Up to 483 conditions per place. [2021-11-19 05:05:33,729 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 149 selfloop transitions, 85 changer transitions 35/308 dead transitions. [2021-11-19 05:05:33,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 308 transitions, 3007 flow [2021-11-19 05:05:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:05:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:05:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-11-19 05:05:33,732 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-11-19 05:05:33,733 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-11-19 05:05:33,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-11-19 05:05:33,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:33,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-11-19 05:05:33,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:33,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:33,745 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:33,745 INFO L186 Difference]: Start difference. First operand has 278 places, 259 transitions, 2077 flow. Second operand 31 states and 1658 transitions. [2021-11-19 05:05:33,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 308 transitions, 3007 flow [2021-11-19 05:05:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 308 transitions, 2721 flow, removed 64 selfloop flow, removed 27 redundant places. [2021-11-19 05:05:33,788 INFO L242 Difference]: Finished difference. Result has 286 places, 256 transitions, 2053 flow [2021-11-19 05:05:33,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2053, PETRI_PLACES=286, PETRI_TRANSITIONS=256} [2021-11-19 05:05:33,789 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-11-19 05:05:33,789 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 256 transitions, 2053 flow [2021-11-19 05:05:33,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:33,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:33,790 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:33,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 05:05:33,791 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1422442310, now seen corresponding path program 18 times [2021-11-19 05:05:33,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:33,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095636563] [2021-11-19 05:05:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:33,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:34,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:34,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095636563] [2021-11-19 05:05:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095636563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:34,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:34,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:34,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198843970] [2021-11-19 05:05:34,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:34,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:34,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:34,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:34,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 256 transitions, 2053 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:34,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:34,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:34,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:35,665 INFO L129 PetriNetUnfolder]: 274/782 cut-off events. [2021-11-19 05:05:35,665 INFO L130 PetriNetUnfolder]: For 3966/3966 co-relation queries the response was YES. [2021-11-19 05:05:35,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 782 events. 274/782 cut-off events. For 3966/3966 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3920 event pairs, 24 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 3882. Up to 481 conditions per place. [2021-11-19 05:05:35,677 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 147 selfloop transitions, 92 changer transitions 26/304 dead transitions. [2021-11-19 05:05:35,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 304 transitions, 2973 flow [2021-11-19 05:05:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:05:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-19 05:05:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1606 transitions. [2021-11-19 05:05:35,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5695035460992908 [2021-11-19 05:05:35,681 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1606 transitions. [2021-11-19 05:05:35,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1606 transitions. [2021-11-19 05:05:35,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:35,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1606 transitions. [2021-11-19 05:05:35,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.53333333333333) internal successors, (1606), 30 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:35,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:35,690 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:35,690 INFO L186 Difference]: Start difference. First operand has 286 places, 256 transitions, 2053 flow. Second operand 30 states and 1606 transitions. [2021-11-19 05:05:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 304 transitions, 2973 flow [2021-11-19 05:05:35,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 2719 flow, removed 24 selfloop flow, removed 28 redundant places. [2021-11-19 05:05:35,731 INFO L242 Difference]: Finished difference. Result has 286 places, 259 transitions, 2104 flow [2021-11-19 05:05:35,731 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2104, PETRI_PLACES=286, PETRI_TRANSITIONS=259} [2021-11-19 05:05:35,731 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-11-19 05:05:35,731 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 259 transitions, 2104 flow [2021-11-19 05:05:35,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:35,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:35,732 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:35,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 05:05:35,732 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash 455971494, now seen corresponding path program 19 times [2021-11-19 05:05:35,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:35,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341536332] [2021-11-19 05:05:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:35,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:36,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:36,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341536332] [2021-11-19 05:05:36,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341536332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:36,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:36,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:36,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546112231] [2021-11-19 05:05:36,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:36,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:36,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:36,215 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:36,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 259 transitions, 2104 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:36,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:36,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:36,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:37,796 INFO L129 PetriNetUnfolder]: 280/801 cut-off events. [2021-11-19 05:05:37,796 INFO L130 PetriNetUnfolder]: For 4384/4384 co-relation queries the response was YES. [2021-11-19 05:05:37,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 801 events. 280/801 cut-off events. For 4384/4384 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4113 event pairs, 25 based on Foata normal form. 1/799 useless extension candidates. Maximal degree in co-relation 4022. Up to 511 conditions per place. [2021-11-19 05:05:37,814 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 78 changer transitions 30/312 dead transitions. [2021-11-19 05:05:37,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 312 transitions, 3125 flow [2021-11-19 05:05:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:05:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:05:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1651 transitions. [2021-11-19 05:05:37,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5665751544269046 [2021-11-19 05:05:37,817 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1651 transitions. [2021-11-19 05:05:37,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1651 transitions. [2021-11-19 05:05:37,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:37,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1651 transitions. [2021-11-19 05:05:37,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.25806451612903) internal successors, (1651), 31 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:37,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:37,852 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:37,852 INFO L186 Difference]: Start difference. First operand has 286 places, 259 transitions, 2104 flow. Second operand 31 states and 1651 transitions. [2021-11-19 05:05:37,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 312 transitions, 3125 flow [2021-11-19 05:05:37,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 312 transitions, 2890 flow, removed 47 selfloop flow, removed 26 redundant places. [2021-11-19 05:05:37,900 INFO L242 Difference]: Finished difference. Result has 297 places, 266 transitions, 2244 flow [2021-11-19 05:05:37,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2244, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2021-11-19 05:05:37,902 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2021-11-19 05:05:37,903 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 2244 flow [2021-11-19 05:05:37,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:37,903 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:37,903 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:37,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 05:05:37,904 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1538372512, now seen corresponding path program 20 times [2021-11-19 05:05:37,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:37,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753079038] [2021-11-19 05:05:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:37,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:38,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:38,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753079038] [2021-11-19 05:05:38,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753079038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:38,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:38,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:05:38,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678741396] [2021-11-19 05:05:38,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:38,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:05:38,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:05:38,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:05:38,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:38,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 2244 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:38,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:38,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:38,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:40,448 INFO L129 PetriNetUnfolder]: 278/784 cut-off events. [2021-11-19 05:05:40,448 INFO L130 PetriNetUnfolder]: For 4499/4499 co-relation queries the response was YES. [2021-11-19 05:05:40,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4153 conditions, 784 events. 278/784 cut-off events. For 4499/4499 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3935 event pairs, 23 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 4062. Up to 503 conditions per place. [2021-11-19 05:05:40,459 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 155 selfloop transitions, 86 changer transitions 30/310 dead transitions. [2021-11-19 05:05:40,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 310 transitions, 3174 flow [2021-11-19 05:05:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:05:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:05:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1701 transitions. [2021-11-19 05:05:40,462 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5654920212765957 [2021-11-19 05:05:40,462 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1701 transitions. [2021-11-19 05:05:40,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1701 transitions. [2021-11-19 05:05:40,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:40,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1701 transitions. [2021-11-19 05:05:40,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.15625) internal successors, (1701), 32 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:40,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:40,473 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:40,473 INFO L186 Difference]: Start difference. First operand has 297 places, 266 transitions, 2244 flow. Second operand 32 states and 1701 transitions. [2021-11-19 05:05:40,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 310 transitions, 3174 flow [2021-11-19 05:05:40,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 310 transitions, 2977 flow, removed 39 selfloop flow, removed 26 redundant places. [2021-11-19 05:05:40,527 INFO L242 Difference]: Finished difference. Result has 304 places, 264 transitions, 2304 flow [2021-11-19 05:05:40,527 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2304, PETRI_PLACES=304, PETRI_TRANSITIONS=264} [2021-11-19 05:05:40,528 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 216 predicate places. [2021-11-19 05:05:40,528 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 264 transitions, 2304 flow [2021-11-19 05:05:40,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:40,529 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:40,529 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:40,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 05:05:40,529 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash 912047628, now seen corresponding path program 21 times [2021-11-19 05:05:40,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:40,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097672549] [2021-11-19 05:05:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:40,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:41,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:41,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097672549] [2021-11-19 05:05:41,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097672549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:41,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:41,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:41,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311547716] [2021-11-19 05:05:41,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:41,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:41,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:41,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:41,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:41,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:41,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 264 transitions, 2304 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:41,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:41,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:41,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:42,620 INFO L129 PetriNetUnfolder]: 274/769 cut-off events. [2021-11-19 05:05:42,620 INFO L130 PetriNetUnfolder]: For 4637/4637 co-relation queries the response was YES. [2021-11-19 05:05:42,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 769 events. 274/769 cut-off events. For 4637/4637 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3840 event pairs, 21 based on Foata normal form. 1/767 useless extension candidates. Maximal degree in co-relation 4072. Up to 472 conditions per place. [2021-11-19 05:05:42,632 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 98 changer transitions 26/314 dead transitions. [2021-11-19 05:05:42,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 314 transitions, 3258 flow [2021-11-19 05:05:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:05:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:05:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1659 transitions. [2021-11-19 05:05:42,635 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5693205216197667 [2021-11-19 05:05:42,635 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1659 transitions. [2021-11-19 05:05:42,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1659 transitions. [2021-11-19 05:05:42,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:42,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1659 transitions. [2021-11-19 05:05:42,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.516129032258064) internal successors, (1659), 31 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:42,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:42,642 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:42,642 INFO L186 Difference]: Start difference. First operand has 304 places, 264 transitions, 2304 flow. Second operand 31 states and 1659 transitions. [2021-11-19 05:05:42,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 314 transitions, 3258 flow [2021-11-19 05:05:42,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 314 transitions, 3017 flow, removed 49 selfloop flow, removed 30 redundant places. [2021-11-19 05:05:42,717 INFO L242 Difference]: Finished difference. Result has 305 places, 267 transitions, 2388 flow [2021-11-19 05:05:42,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2388, PETRI_PLACES=305, PETRI_TRANSITIONS=267} [2021-11-19 05:05:42,718 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 217 predicate places. [2021-11-19 05:05:42,719 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 267 transitions, 2388 flow [2021-11-19 05:05:42,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:42,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:42,719 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:42,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 05:05:42,719 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1938344598, now seen corresponding path program 22 times [2021-11-19 05:05:42,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:42,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537781191] [2021-11-19 05:05:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:42,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:43,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:43,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537781191] [2021-11-19 05:05:43,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537781191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:43,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:43,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:05:43,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273609694] [2021-11-19 05:05:43,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:43,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:05:43,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:43,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:05:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:43,242 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:43,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 267 transitions, 2388 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:43,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:43,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:43,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:45,230 INFO L129 PetriNetUnfolder]: 275/774 cut-off events. [2021-11-19 05:05:45,231 INFO L130 PetriNetUnfolder]: For 4184/4184 co-relation queries the response was YES. [2021-11-19 05:05:45,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4228 conditions, 774 events. 275/774 cut-off events. For 4184/4184 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3879 event pairs, 21 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 4134. Up to 493 conditions per place. [2021-11-19 05:05:45,241 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 155 selfloop transitions, 96 changer transitions 25/315 dead transitions. [2021-11-19 05:05:45,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 315 transitions, 3328 flow [2021-11-19 05:05:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:05:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:05:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1756 transitions. [2021-11-19 05:05:45,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.56608639587363 [2021-11-19 05:05:45,244 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1756 transitions. [2021-11-19 05:05:45,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1756 transitions. [2021-11-19 05:05:45,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:45,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1756 transitions. [2021-11-19 05:05:45,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.21212121212121) internal successors, (1756), 33 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:45,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:45,253 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:45,253 INFO L186 Difference]: Start difference. First operand has 305 places, 267 transitions, 2388 flow. Second operand 33 states and 1756 transitions. [2021-11-19 05:05:45,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 315 transitions, 3328 flow [2021-11-19 05:05:45,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 315 transitions, 3058 flow, removed 33 selfloop flow, removed 28 redundant places. [2021-11-19 05:05:45,304 INFO L242 Difference]: Finished difference. Result has 311 places, 271 transitions, 2458 flow [2021-11-19 05:05:45,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2458, PETRI_PLACES=311, PETRI_TRANSITIONS=271} [2021-11-19 05:05:45,306 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 223 predicate places. [2021-11-19 05:05:45,306 INFO L470 AbstractCegarLoop]: Abstraction has has 311 places, 271 transitions, 2458 flow [2021-11-19 05:05:45,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:45,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:45,307 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:45,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 05:05:45,307 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1491535294, now seen corresponding path program 23 times [2021-11-19 05:05:45,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:45,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726552302] [2021-11-19 05:05:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:45,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:45,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:45,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726552302] [2021-11-19 05:05:45,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726552302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:45,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:45,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:05:45,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975294251] [2021-11-19 05:05:45,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:45,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:05:45,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:05:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:05:45,947 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:45,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 271 transitions, 2458 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:45,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:45,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:45,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:47,883 INFO L129 PetriNetUnfolder]: 277/781 cut-off events. [2021-11-19 05:05:47,883 INFO L130 PetriNetUnfolder]: For 4454/4454 co-relation queries the response was YES. [2021-11-19 05:05:47,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4275 conditions, 781 events. 277/781 cut-off events. For 4454/4454 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3926 event pairs, 22 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 4181. Up to 508 conditions per place. [2021-11-19 05:05:47,896 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 162 selfloop transitions, 86 changer transitions 29/316 dead transitions. [2021-11-19 05:05:47,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 316 transitions, 3373 flow [2021-11-19 05:05:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:05:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:05:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1848 transitions. [2021-11-19 05:05:47,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2021-11-19 05:05:47,910 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1848 transitions. [2021-11-19 05:05:47,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1848 transitions. [2021-11-19 05:05:47,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:47,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1848 transitions. [2021-11-19 05:05:47,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.8) internal successors, (1848), 35 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:47,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:47,920 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:47,920 INFO L186 Difference]: Start difference. First operand has 311 places, 271 transitions, 2458 flow. Second operand 35 states and 1848 transitions. [2021-11-19 05:05:47,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 316 transitions, 3373 flow [2021-11-19 05:05:47,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 316 transitions, 3137 flow, removed 34 selfloop flow, removed 26 redundant places. [2021-11-19 05:05:47,979 INFO L242 Difference]: Finished difference. Result has 320 places, 271 transitions, 2462 flow [2021-11-19 05:05:47,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2462, PETRI_PLACES=320, PETRI_TRANSITIONS=271} [2021-11-19 05:05:47,981 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 232 predicate places. [2021-11-19 05:05:47,981 INFO L470 AbstractCegarLoop]: Abstraction has has 320 places, 271 transitions, 2462 flow [2021-11-19 05:05:47,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:47,982 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:47,982 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:47,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 05:05:47,982 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1861472024, now seen corresponding path program 24 times [2021-11-19 05:05:47,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:47,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610895996] [2021-11-19 05:05:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:47,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:48,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:48,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610895996] [2021-11-19 05:05:48,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610895996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:48,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:48,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:05:48,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315827240] [2021-11-19 05:05:48,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:48,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:05:48,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:05:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:05:48,592 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:48,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 271 transitions, 2462 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:48,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:48,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:48,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:50,860 INFO L129 PetriNetUnfolder]: 275/774 cut-off events. [2021-11-19 05:05:50,860 INFO L130 PetriNetUnfolder]: For 4622/4622 co-relation queries the response was YES. [2021-11-19 05:05:50,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4319 conditions, 774 events. 275/774 cut-off events. For 4622/4622 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3861 event pairs, 18 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 4226. Up to 484 conditions per place. [2021-11-19 05:05:50,871 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 153 selfloop transitions, 100 changer transitions 25/317 dead transitions. [2021-11-19 05:05:50,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 317 transitions, 3417 flow [2021-11-19 05:05:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:05:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:05:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1755 transitions. [2021-11-19 05:05:50,873 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5657640232108317 [2021-11-19 05:05:50,873 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1755 transitions. [2021-11-19 05:05:50,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1755 transitions. [2021-11-19 05:05:50,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:50,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1755 transitions. [2021-11-19 05:05:50,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.18181818181818) internal successors, (1755), 33 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:50,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:50,882 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:50,882 INFO L186 Difference]: Start difference. First operand has 320 places, 271 transitions, 2462 flow. Second operand 33 states and 1755 transitions. [2021-11-19 05:05:50,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 317 transitions, 3417 flow [2021-11-19 05:05:50,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 317 transitions, 3098 flow, removed 49 selfloop flow, removed 31 redundant places. [2021-11-19 05:05:50,937 INFO L242 Difference]: Finished difference. Result has 322 places, 272 transitions, 2494 flow [2021-11-19 05:05:50,938 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2494, PETRI_PLACES=322, PETRI_TRANSITIONS=272} [2021-11-19 05:05:50,939 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 234 predicate places. [2021-11-19 05:05:50,939 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 272 transitions, 2494 flow [2021-11-19 05:05:50,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:50,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:50,940 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:50,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 05:05:50,940 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:50,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1005068040, now seen corresponding path program 25 times [2021-11-19 05:05:50,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:50,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514455229] [2021-11-19 05:05:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:50,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:51,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:51,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514455229] [2021-11-19 05:05:51,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514455229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:51,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:51,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:05:51,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239354383] [2021-11-19 05:05:51,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:51,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:05:51,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:05:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:05:51,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:51,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 272 transitions, 2494 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:51,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:51,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:51,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:53,896 INFO L129 PetriNetUnfolder]: 268/769 cut-off events. [2021-11-19 05:05:53,897 INFO L130 PetriNetUnfolder]: For 4825/4825 co-relation queries the response was YES. [2021-11-19 05:05:53,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4309 conditions, 769 events. 268/769 cut-off events. For 4825/4825 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3882 event pairs, 20 based on Foata normal form. 1/767 useless extension candidates. Maximal degree in co-relation 4213. Up to 507 conditions per place. [2021-11-19 05:05:53,910 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 164 selfloop transitions, 90 changer transitions 15/308 dead transitions. [2021-11-19 05:05:53,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 308 transitions, 3370 flow [2021-11-19 05:05:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:05:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:05:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1892 transitions. [2021-11-19 05:05:53,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5591016548463357 [2021-11-19 05:05:53,915 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1892 transitions. [2021-11-19 05:05:53,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1892 transitions. [2021-11-19 05:05:53,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:53,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1892 transitions. [2021-11-19 05:05:53,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.55555555555556) internal successors, (1892), 36 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:53,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:53,925 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:53,925 INFO L186 Difference]: Start difference. First operand has 322 places, 272 transitions, 2494 flow. Second operand 36 states and 1892 transitions. [2021-11-19 05:05:53,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 308 transitions, 3370 flow [2021-11-19 05:05:53,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 308 transitions, 3100 flow, removed 51 selfloop flow, removed 28 redundant places. [2021-11-19 05:05:53,989 INFO L242 Difference]: Finished difference. Result has 331 places, 277 transitions, 2571 flow [2021-11-19 05:05:53,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2571, PETRI_PLACES=331, PETRI_TRANSITIONS=277} [2021-11-19 05:05:53,991 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 243 predicate places. [2021-11-19 05:05:53,991 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 277 transitions, 2571 flow [2021-11-19 05:05:53,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:53,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:53,992 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:53,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 05:05:53,992 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1846631542, now seen corresponding path program 26 times [2021-11-19 05:05:53,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:53,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798071700] [2021-11-19 05:05:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:53,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:54,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:54,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798071700] [2021-11-19 05:05:54,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798071700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:54,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:54,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:05:54,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428458546] [2021-11-19 05:05:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:54,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:05:54,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:05:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:05:54,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:54,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 277 transitions, 2571 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:54,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:54,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:54,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:05:57,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:05:58,068 INFO L129 PetriNetUnfolder]: 265/752 cut-off events. [2021-11-19 05:05:58,068 INFO L130 PetriNetUnfolder]: For 4782/4782 co-relation queries the response was YES. [2021-11-19 05:05:58,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4277 conditions, 752 events. 265/752 cut-off events. For 4782/4782 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3754 event pairs, 21 based on Foata normal form. 1/750 useless extension candidates. Maximal degree in co-relation 4178. Up to 507 conditions per place. [2021-11-19 05:05:58,081 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 163 selfloop transitions, 83 changer transitions 19/304 dead transitions. [2021-11-19 05:05:58,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 304 transitions, 3262 flow [2021-11-19 05:05:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:05:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:05:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1739 transitions. [2021-11-19 05:05:58,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2021-11-19 05:05:58,094 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1739 transitions. [2021-11-19 05:05:58,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1739 transitions. [2021-11-19 05:05:58,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:05:58,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1739 transitions. [2021-11-19 05:05:58,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.696969696969695) internal successors, (1739), 33 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:58,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:58,103 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:58,103 INFO L186 Difference]: Start difference. First operand has 331 places, 277 transitions, 2571 flow. Second operand 33 states and 1739 transitions. [2021-11-19 05:05:58,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 304 transitions, 3262 flow [2021-11-19 05:05:58,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 304 transitions, 2999 flow, removed 63 selfloop flow, removed 31 redundant places. [2021-11-19 05:05:58,173 INFO L242 Difference]: Finished difference. Result has 331 places, 270 transitions, 2475 flow [2021-11-19 05:05:58,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2475, PETRI_PLACES=331, PETRI_TRANSITIONS=270} [2021-11-19 05:05:58,175 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 243 predicate places. [2021-11-19 05:05:58,175 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 270 transitions, 2475 flow [2021-11-19 05:05:58,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:58,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:05:58,176 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:58,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 05:05:58,177 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:05:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1785682092, now seen corresponding path program 27 times [2021-11-19 05:05:58,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:58,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359722146] [2021-11-19 05:05:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:58,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:58,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:58,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359722146] [2021-11-19 05:05:58,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359722146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:58,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:58,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:05:58,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444244781] [2021-11-19 05:05:58,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:58,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:05:58,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:05:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:05:58,889 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:05:58,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 270 transitions, 2475 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:05:58,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:05:58,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:05:58,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:00,949 INFO L129 PetriNetUnfolder]: 261/747 cut-off events. [2021-11-19 05:06:00,949 INFO L130 PetriNetUnfolder]: For 4550/4550 co-relation queries the response was YES. [2021-11-19 05:06:00,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4215 conditions, 747 events. 261/747 cut-off events. For 4550/4550 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3689 event pairs, 19 based on Foata normal form. 1/745 useless extension candidates. Maximal degree in co-relation 4117. Up to 486 conditions per place. [2021-11-19 05:06:00,998 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 152 selfloop transitions, 94 changer transitions 18/303 dead transitions. [2021-11-19 05:06:00,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 303 transitions, 3207 flow [2021-11-19 05:06:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:06:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:06:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1646 transitions. [2021-11-19 05:06:01,002 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5648592999313659 [2021-11-19 05:06:01,002 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1646 transitions. [2021-11-19 05:06:01,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1646 transitions. [2021-11-19 05:06:01,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:01,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1646 transitions. [2021-11-19 05:06:01,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.096774193548384) internal successors, (1646), 31 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:01,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:01,013 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:01,013 INFO L186 Difference]: Start difference. First operand has 331 places, 270 transitions, 2475 flow. Second operand 31 states and 1646 transitions. [2021-11-19 05:06:01,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 303 transitions, 3207 flow [2021-11-19 05:06:01,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 303 transitions, 2967 flow, removed 15 selfloop flow, removed 33 redundant places. [2021-11-19 05:06:01,073 INFO L242 Difference]: Finished difference. Result has 326 places, 267 transitions, 2452 flow [2021-11-19 05:06:01,074 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2452, PETRI_PLACES=326, PETRI_TRANSITIONS=267} [2021-11-19 05:06:01,075 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 238 predicate places. [2021-11-19 05:06:01,075 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 267 transitions, 2452 flow [2021-11-19 05:06:01,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:01,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:01,076 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:01,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 05:06:01,077 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash 28237504, now seen corresponding path program 28 times [2021-11-19 05:06:01,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:01,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917733608] [2021-11-19 05:06:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:01,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:01,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:01,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917733608] [2021-11-19 05:06:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917733608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:01,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:01,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:06:01,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767210886] [2021-11-19 05:06:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:01,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:06:01,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:06:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:06:01,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:01,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 267 transitions, 2452 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:01,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:01,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:01,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:04,520 INFO L129 PetriNetUnfolder]: 256/728 cut-off events. [2021-11-19 05:06:04,521 INFO L130 PetriNetUnfolder]: For 4331/4331 co-relation queries the response was YES. [2021-11-19 05:06:04,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 728 events. 256/728 cut-off events. For 4331/4331 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3565 event pairs, 20 based on Foata normal form. 1/726 useless extension candidates. Maximal degree in co-relation 4018. Up to 500 conditions per place. [2021-11-19 05:06:04,536 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 158 selfloop transitions, 64 changer transitions 29/290 dead transitions. [2021-11-19 05:06:04,537 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 290 transitions, 3055 flow [2021-11-19 05:06:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:06:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:06:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1681 transitions. [2021-11-19 05:06:04,540 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558843085106383 [2021-11-19 05:06:04,541 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1681 transitions. [2021-11-19 05:06:04,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1681 transitions. [2021-11-19 05:06:04,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:04,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1681 transitions. [2021-11-19 05:06:04,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.53125) internal successors, (1681), 32 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:04,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:04,549 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:04,549 INFO L186 Difference]: Start difference. First operand has 326 places, 267 transitions, 2452 flow. Second operand 32 states and 1681 transitions. [2021-11-19 05:06:04,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 290 transitions, 3055 flow [2021-11-19 05:06:04,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 290 transitions, 2771 flow, removed 11 selfloop flow, removed 32 redundant places. [2021-11-19 05:06:04,607 INFO L242 Difference]: Finished difference. Result has 321 places, 247 transitions, 2080 flow [2021-11-19 05:06:04,607 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2080, PETRI_PLACES=321, PETRI_TRANSITIONS=247} [2021-11-19 05:06:04,608 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 233 predicate places. [2021-11-19 05:06:04,608 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 247 transitions, 2080 flow [2021-11-19 05:06:04,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:04,609 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:04,609 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:04,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 05:06:04,610 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1833529844, now seen corresponding path program 29 times [2021-11-19 05:06:04,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:04,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878896101] [2021-11-19 05:06:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:04,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:05,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:05,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878896101] [2021-11-19 05:06:05,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878896101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:05,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:05,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:05,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121041151] [2021-11-19 05:06:05,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:05,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:05,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:05,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:05,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 247 transitions, 2080 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:05,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:05,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:05,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:06,772 INFO L129 PetriNetUnfolder]: 257/732 cut-off events. [2021-11-19 05:06:06,772 INFO L130 PetriNetUnfolder]: For 4217/4217 co-relation queries the response was YES. [2021-11-19 05:06:06,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 732 events. 257/732 cut-off events. For 4217/4217 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3570 event pairs, 19 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 3846. Up to 454 conditions per place. [2021-11-19 05:06:06,783 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 139 selfloop transitions, 96 changer transitions 19/293 dead transitions. [2021-11-19 05:06:06,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 293 transitions, 3000 flow [2021-11-19 05:06:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 05:06:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-19 05:06:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1550 transitions. [2021-11-19 05:06:06,786 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5685986793837124 [2021-11-19 05:06:06,786 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1550 transitions. [2021-11-19 05:06:06,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1550 transitions. [2021-11-19 05:06:06,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:06,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1550 transitions. [2021-11-19 05:06:06,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.44827586206897) internal successors, (1550), 29 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:06,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:06,794 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:06,794 INFO L186 Difference]: Start difference. First operand has 321 places, 247 transitions, 2080 flow. Second operand 29 states and 1550 transitions. [2021-11-19 05:06:06,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 293 transitions, 3000 flow [2021-11-19 05:06:06,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 293 transitions, 2726 flow, removed 26 selfloop flow, removed 38 redundant places. [2021-11-19 05:06:06,850 INFO L242 Difference]: Finished difference. Result has 290 places, 252 transitions, 2134 flow [2021-11-19 05:06:06,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2134, PETRI_PLACES=290, PETRI_TRANSITIONS=252} [2021-11-19 05:06:06,852 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 202 predicate places. [2021-11-19 05:06:06,853 INFO L470 AbstractCegarLoop]: Abstraction has has 290 places, 252 transitions, 2134 flow [2021-11-19 05:06:06,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:06,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:06,853 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:06,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 05:06:06,854 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1005074932, now seen corresponding path program 30 times [2021-11-19 05:06:06,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:06,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640503200] [2021-11-19 05:06:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:06,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:07,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:07,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640503200] [2021-11-19 05:06:07,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640503200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:07,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:07,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:07,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143449858] [2021-11-19 05:06:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:07,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:07,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:07,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:07,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 252 transitions, 2134 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:07,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:07,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:07,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:09,069 INFO L129 PetriNetUnfolder]: 259/719 cut-off events. [2021-11-19 05:06:09,069 INFO L130 PetriNetUnfolder]: For 4259/4259 co-relation queries the response was YES. [2021-11-19 05:06:09,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 719 events. 259/719 cut-off events. For 4259/4259 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3452 event pairs, 18 based on Foata normal form. 1/717 useless extension candidates. Maximal degree in co-relation 3815. Up to 458 conditions per place. [2021-11-19 05:06:09,080 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 140 selfloop transitions, 97 changer transitions 18/294 dead transitions. [2021-11-19 05:06:09,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 294 transitions, 2989 flow [2021-11-19 05:06:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:06:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-19 05:06:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1602 transitions. [2021-11-19 05:06:09,085 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5680851063829787 [2021-11-19 05:06:09,086 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1602 transitions. [2021-11-19 05:06:09,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1602 transitions. [2021-11-19 05:06:09,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:09,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1602 transitions. [2021-11-19 05:06:09,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.4) internal successors, (1602), 30 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:09,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:09,092 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:09,092 INFO L186 Difference]: Start difference. First operand has 290 places, 252 transitions, 2134 flow. Second operand 30 states and 1602 transitions. [2021-11-19 05:06:09,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 294 transitions, 2989 flow [2021-11-19 05:06:09,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 294 transitions, 2748 flow, removed 53 selfloop flow, removed 24 redundant places. [2021-11-19 05:06:09,147 INFO L242 Difference]: Finished difference. Result has 297 places, 254 transitions, 2192 flow [2021-11-19 05:06:09,147 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2192, PETRI_PLACES=297, PETRI_TRANSITIONS=254} [2021-11-19 05:06:09,148 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2021-11-19 05:06:09,148 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 254 transitions, 2192 flow [2021-11-19 05:06:09,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:09,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:09,149 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:09,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 05:06:09,150 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:09,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1551116998, now seen corresponding path program 31 times [2021-11-19 05:06:09,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:09,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558614605] [2021-11-19 05:06:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:09,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:09,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:09,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558614605] [2021-11-19 05:06:09,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558614605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:09,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:09,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:09,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104947130] [2021-11-19 05:06:09,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:09,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:09,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:09,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:09,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:09,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 254 transitions, 2192 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:09,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:09,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:09,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:11,596 INFO L129 PetriNetUnfolder]: 254/705 cut-off events. [2021-11-19 05:06:11,596 INFO L130 PetriNetUnfolder]: For 4116/4116 co-relation queries the response was YES. [2021-11-19 05:06:11,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3858 conditions, 705 events. 254/705 cut-off events. For 4116/4116 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3344 event pairs, 19 based on Foata normal form. 1/702 useless extension candidates. Maximal degree in co-relation 3770. Up to 451 conditions per place. [2021-11-19 05:06:11,607 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 140 selfloop transitions, 100 changer transitions 14/293 dead transitions. [2021-11-19 05:06:11,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 293 transitions, 3011 flow [2021-11-19 05:06:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:06:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:06:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1701 transitions. [2021-11-19 05:06:11,609 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5654920212765957 [2021-11-19 05:06:11,609 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1701 transitions. [2021-11-19 05:06:11,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1701 transitions. [2021-11-19 05:06:11,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:11,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1701 transitions. [2021-11-19 05:06:11,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.15625) internal successors, (1701), 32 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:11,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:11,614 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:11,615 INFO L186 Difference]: Start difference. First operand has 297 places, 254 transitions, 2192 flow. Second operand 32 states and 1701 transitions. [2021-11-19 05:06:11,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 293 transitions, 3011 flow [2021-11-19 05:06:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 293 transitions, 2800 flow, removed 30 selfloop flow, removed 27 redundant places. [2021-11-19 05:06:11,653 INFO L242 Difference]: Finished difference. Result has 303 places, 257 transitions, 2291 flow [2021-11-19 05:06:11,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2291, PETRI_PLACES=303, PETRI_TRANSITIONS=257} [2021-11-19 05:06:11,654 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 215 predicate places. [2021-11-19 05:06:11,654 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 257 transitions, 2291 flow [2021-11-19 05:06:11,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:11,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:11,655 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:11,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 05:06:11,655 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1269698554, now seen corresponding path program 32 times [2021-11-19 05:06:11,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:11,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368050695] [2021-11-19 05:06:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:11,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:12,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:12,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368050695] [2021-11-19 05:06:12,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368050695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:12,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:12,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:06:12,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507239439] [2021-11-19 05:06:12,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:12,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:06:12,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:06:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:06:12,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:12,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 257 transitions, 2291 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:12,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:12,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:12,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:14,091 INFO L129 PetriNetUnfolder]: 255/710 cut-off events. [2021-11-19 05:06:14,092 INFO L130 PetriNetUnfolder]: For 4029/4029 co-relation queries the response was YES. [2021-11-19 05:06:14,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 710 events. 255/710 cut-off events. For 4029/4029 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3392 event pairs, 16 based on Foata normal form. 1/708 useless extension candidates. Maximal degree in co-relation 3836. Up to 450 conditions per place. [2021-11-19 05:06:14,108 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 137 selfloop transitions, 105 changer transitions 16/297 dead transitions. [2021-11-19 05:06:14,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 297 transitions, 3115 flow [2021-11-19 05:06:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:06:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:06:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1853 transitions. [2021-11-19 05:06:14,112 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5632218844984802 [2021-11-19 05:06:14,112 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1853 transitions. [2021-11-19 05:06:14,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1853 transitions. [2021-11-19 05:06:14,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:14,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1853 transitions. [2021-11-19 05:06:14,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.94285714285714) internal successors, (1853), 35 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:14,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:14,122 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:14,122 INFO L186 Difference]: Start difference. First operand has 303 places, 257 transitions, 2291 flow. Second operand 35 states and 1853 transitions. [2021-11-19 05:06:14,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 297 transitions, 3115 flow [2021-11-19 05:06:14,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 297 transitions, 2879 flow, removed 33 selfloop flow, removed 27 redundant places. [2021-11-19 05:06:14,178 INFO L242 Difference]: Finished difference. Result has 312 places, 259 transitions, 2367 flow [2021-11-19 05:06:14,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2367, PETRI_PLACES=312, PETRI_TRANSITIONS=259} [2021-11-19 05:06:14,179 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 224 predicate places. [2021-11-19 05:06:14,179 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 259 transitions, 2367 flow [2021-11-19 05:06:14,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:14,180 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:14,180 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:14,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 05:06:14,180 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash -774744260, now seen corresponding path program 33 times [2021-11-19 05:06:14,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:14,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887436331] [2021-11-19 05:06:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:14,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:14,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:14,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887436331] [2021-11-19 05:06:14,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887436331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:14,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:14,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:06:14,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543138918] [2021-11-19 05:06:14,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:14,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:06:14,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:06:14,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:06:14,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:14,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 259 transitions, 2367 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:14,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:14,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:14,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:16,540 INFO L129 PetriNetUnfolder]: 257/719 cut-off events. [2021-11-19 05:06:16,540 INFO L130 PetriNetUnfolder]: For 4401/4401 co-relation queries the response was YES. [2021-11-19 05:06:16,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4036 conditions, 719 events. 257/719 cut-off events. For 4401/4401 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3444 event pairs, 17 based on Foata normal form. 1/717 useless extension candidates. Maximal degree in co-relation 3945. Up to 483 conditions per place. [2021-11-19 05:06:16,595 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 160 selfloop transitions, 83 changer transitions 16/298 dead transitions. [2021-11-19 05:06:16,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 298 transitions, 3189 flow [2021-11-19 05:06:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:06:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:06:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1792 transitions. [2021-11-19 05:06:16,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5607008760951189 [2021-11-19 05:06:16,600 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1792 transitions. [2021-11-19 05:06:16,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1792 transitions. [2021-11-19 05:06:16,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:16,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1792 transitions. [2021-11-19 05:06:16,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.705882352941174) internal successors, (1792), 34 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:16,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:16,609 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:16,609 INFO L186 Difference]: Start difference. First operand has 312 places, 259 transitions, 2367 flow. Second operand 34 states and 1792 transitions. [2021-11-19 05:06:16,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 298 transitions, 3189 flow [2021-11-19 05:06:16,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 298 transitions, 2920 flow, removed 27 selfloop flow, removed 30 redundant places. [2021-11-19 05:06:16,656 INFO L242 Difference]: Finished difference. Result has 318 places, 264 transitions, 2375 flow [2021-11-19 05:06:16,656 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2375, PETRI_PLACES=318, PETRI_TRANSITIONS=264} [2021-11-19 05:06:16,657 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 230 predicate places. [2021-11-19 05:06:16,657 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 264 transitions, 2375 flow [2021-11-19 05:06:16,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:16,658 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:16,658 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:16,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 05:06:16,659 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1071112154, now seen corresponding path program 34 times [2021-11-19 05:06:16,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:16,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688822494] [2021-11-19 05:06:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:16,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:17,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:17,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688822494] [2021-11-19 05:06:17,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688822494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:17,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:17,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:17,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013226992] [2021-11-19 05:06:17,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:17,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:17,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:17,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:17,332 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:17,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 264 transitions, 2375 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:17,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:17,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:17,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:18,749 INFO L129 PetriNetUnfolder]: 252/704 cut-off events. [2021-11-19 05:06:18,749 INFO L130 PetriNetUnfolder]: For 4323/4323 co-relation queries the response was YES. [2021-11-19 05:06:18,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3947 conditions, 704 events. 252/704 cut-off events. For 4323/4323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3365 event pairs, 17 based on Foata normal form. 1/702 useless extension candidates. Maximal degree in co-relation 3851. Up to 456 conditions per place. [2021-11-19 05:06:18,757 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 149 selfloop transitions, 87 changer transitions 18/293 dead transitions. [2021-11-19 05:06:18,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 293 transitions, 3063 flow [2021-11-19 05:06:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:06:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:06:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1647 transitions. [2021-11-19 05:06:18,759 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5652024708304736 [2021-11-19 05:06:18,759 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1647 transitions. [2021-11-19 05:06:18,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1647 transitions. [2021-11-19 05:06:18,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:18,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1647 transitions. [2021-11-19 05:06:18,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.12903225806452) internal successors, (1647), 31 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:18,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:18,764 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:18,764 INFO L186 Difference]: Start difference. First operand has 318 places, 264 transitions, 2375 flow. Second operand 31 states and 1647 transitions. [2021-11-19 05:06:18,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 293 transitions, 3063 flow [2021-11-19 05:06:18,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 293 transitions, 2859 flow, removed 39 selfloop flow, removed 28 redundant places. [2021-11-19 05:06:18,795 INFO L242 Difference]: Finished difference. Result has 319 places, 254 transitions, 2279 flow [2021-11-19 05:06:18,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2279, PETRI_PLACES=319, PETRI_TRANSITIONS=254} [2021-11-19 05:06:18,796 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 231 predicate places. [2021-11-19 05:06:18,796 INFO L470 AbstractCegarLoop]: Abstraction has has 319 places, 254 transitions, 2279 flow [2021-11-19 05:06:18,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:18,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:18,797 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:18,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 05:06:18,797 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:18,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1979983374, now seen corresponding path program 35 times [2021-11-19 05:06:18,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:18,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101869319] [2021-11-19 05:06:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:18,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:19,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:19,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101869319] [2021-11-19 05:06:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101869319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:19,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:06:19,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139002570] [2021-11-19 05:06:19,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:19,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:06:19,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:06:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:06:19,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:19,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 254 transitions, 2279 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:19,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:19,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:19,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:20,917 INFO L129 PetriNetUnfolder]: 247/686 cut-off events. [2021-11-19 05:06:20,917 INFO L130 PetriNetUnfolder]: For 4186/4186 co-relation queries the response was YES. [2021-11-19 05:06:20,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 686 events. 247/686 cut-off events. For 4186/4186 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3234 event pairs, 14 based on Foata normal form. 1/685 useless extension candidates. Maximal degree in co-relation 3795. Up to 448 conditions per place. [2021-11-19 05:06:20,925 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 142 selfloop transitions, 84 changer transitions 18/283 dead transitions. [2021-11-19 05:06:20,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 283 transitions, 2949 flow [2021-11-19 05:06:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:06:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:06:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1696 transitions. [2021-11-19 05:06:20,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2021-11-19 05:06:20,928 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1696 transitions. [2021-11-19 05:06:20,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1696 transitions. [2021-11-19 05:06:20,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:20,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1696 transitions. [2021-11-19 05:06:20,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.0) internal successors, (1696), 32 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:20,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:20,935 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:20,935 INFO L186 Difference]: Start difference. First operand has 319 places, 254 transitions, 2279 flow. Second operand 32 states and 1696 transitions. [2021-11-19 05:06:20,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 283 transitions, 2949 flow [2021-11-19 05:06:20,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 283 transitions, 2693 flow, removed 19 selfloop flow, removed 32 redundant places. [2021-11-19 05:06:20,969 INFO L242 Difference]: Finished difference. Result has 310 places, 244 transitions, 2135 flow [2021-11-19 05:06:20,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2135, PETRI_PLACES=310, PETRI_TRANSITIONS=244} [2021-11-19 05:06:20,970 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 222 predicate places. [2021-11-19 05:06:20,970 INFO L470 AbstractCegarLoop]: Abstraction has has 310 places, 244 transitions, 2135 flow [2021-11-19 05:06:20,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:20,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:20,971 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:20,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-19 05:06:20,971 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash -210741460, now seen corresponding path program 36 times [2021-11-19 05:06:20,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:20,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672608601] [2021-11-19 05:06:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:20,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:21,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:21,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672608601] [2021-11-19 05:06:21,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672608601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:21,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:21,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:06:21,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381208227] [2021-11-19 05:06:21,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:21,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:06:21,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:21,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:06:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:06:21,490 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:21,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 244 transitions, 2135 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:21,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:21,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:21,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:22,976 INFO L129 PetriNetUnfolder]: 243/678 cut-off events. [2021-11-19 05:06:22,977 INFO L130 PetriNetUnfolder]: For 4149/4149 co-relation queries the response was YES. [2021-11-19 05:06:22,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3786 conditions, 678 events. 243/678 cut-off events. For 4149/4149 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3201 event pairs, 18 based on Foata normal form. 1/675 useless extension candidates. Maximal degree in co-relation 3692. Up to 456 conditions per place. [2021-11-19 05:06:22,986 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 68 changer transitions 21/269 dead transitions. [2021-11-19 05:06:22,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 269 transitions, 2744 flow [2021-11-19 05:06:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:06:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:06:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1635 transitions. [2021-11-19 05:06:22,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5610844200411805 [2021-11-19 05:06:22,989 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1635 transitions. [2021-11-19 05:06:22,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1635 transitions. [2021-11-19 05:06:22,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:22,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1635 transitions. [2021-11-19 05:06:22,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.74193548387097) internal successors, (1635), 31 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:22,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:22,998 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:22,998 INFO L186 Difference]: Start difference. First operand has 310 places, 244 transitions, 2135 flow. Second operand 31 states and 1635 transitions. [2021-11-19 05:06:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 269 transitions, 2744 flow [2021-11-19 05:06:23,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 269 transitions, 2487 flow, removed 15 selfloop flow, removed 33 redundant places. [2021-11-19 05:06:23,050 INFO L242 Difference]: Finished difference. Result has 297 places, 231 transitions, 1911 flow [2021-11-19 05:06:23,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1911, PETRI_PLACES=297, PETRI_TRANSITIONS=231} [2021-11-19 05:06:23,051 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2021-11-19 05:06:23,052 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 231 transitions, 1911 flow [2021-11-19 05:06:23,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:23,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:23,053 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:23,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-19 05:06:23,053 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash -394825584, now seen corresponding path program 37 times [2021-11-19 05:06:23,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:23,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477825728] [2021-11-19 05:06:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:23,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:23,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:23,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477825728] [2021-11-19 05:06:23,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477825728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:23,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:23,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:23,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324355958] [2021-11-19 05:06:23,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:23,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:23,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:23,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:23,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 231 transitions, 1911 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:23,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:23,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:23,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:24,890 INFO L129 PetriNetUnfolder]: 239/654 cut-off events. [2021-11-19 05:06:24,890 INFO L130 PetriNetUnfolder]: For 3742/3742 co-relation queries the response was YES. [2021-11-19 05:06:24,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 654 events. 239/654 cut-off events. For 3742/3742 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2991 event pairs, 18 based on Foata normal form. 1/652 useless extension candidates. Maximal degree in co-relation 3502. Up to 433 conditions per place. [2021-11-19 05:06:24,899 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 122 selfloop transitions, 72 changer transitions 28/261 dead transitions. [2021-11-19 05:06:24,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 261 transitions, 2530 flow [2021-11-19 05:06:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:06:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-19 05:06:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1592 transitions. [2021-11-19 05:06:24,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5645390070921986 [2021-11-19 05:06:24,902 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1592 transitions. [2021-11-19 05:06:24,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1592 transitions. [2021-11-19 05:06:24,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:24,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1592 transitions. [2021-11-19 05:06:24,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.06666666666667) internal successors, (1592), 30 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:24,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:24,909 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:24,909 INFO L186 Difference]: Start difference. First operand has 297 places, 231 transitions, 1911 flow. Second operand 30 states and 1592 transitions. [2021-11-19 05:06:24,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 261 transitions, 2530 flow [2021-11-19 05:06:24,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 261 transitions, 2302 flow, removed 18 selfloop flow, removed 33 redundant places. [2021-11-19 05:06:24,942 INFO L242 Difference]: Finished difference. Result has 276 places, 218 transitions, 1759 flow [2021-11-19 05:06:24,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1759, PETRI_PLACES=276, PETRI_TRANSITIONS=218} [2021-11-19 05:06:24,943 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 188 predicate places. [2021-11-19 05:06:24,943 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 218 transitions, 1759 flow [2021-11-19 05:06:24,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:24,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:24,944 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:24,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-19 05:06:24,944 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash 323224922, now seen corresponding path program 38 times [2021-11-19 05:06:24,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:24,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441499120] [2021-11-19 05:06:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:24,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:25,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:25,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441499120] [2021-11-19 05:06:25,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441499120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:25,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:25,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:06:25,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215237189] [2021-11-19 05:06:25,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:25,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:06:25,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:06:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:06:25,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:25,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 218 transitions, 1759 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:25,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:25,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:25,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:27,452 INFO L129 PetriNetUnfolder]: 232/628 cut-off events. [2021-11-19 05:06:27,452 INFO L130 PetriNetUnfolder]: For 3536/3536 co-relation queries the response was YES. [2021-11-19 05:06:27,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3424 conditions, 628 events. 232/628 cut-off events. For 3536/3536 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2798 event pairs, 17 based on Foata normal form. 1/627 useless extension candidates. Maximal degree in co-relation 3343. Up to 429 conditions per place. [2021-11-19 05:06:27,465 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 119 selfloop transitions, 75 changer transitions 16/249 dead transitions. [2021-11-19 05:06:27,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 249 transitions, 2405 flow [2021-11-19 05:06:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:06:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:06:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1784 transitions. [2021-11-19 05:06:27,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.55819774718398 [2021-11-19 05:06:27,468 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1784 transitions. [2021-11-19 05:06:27,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1784 transitions. [2021-11-19 05:06:27,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:27,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1784 transitions. [2021-11-19 05:06:27,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.470588235294116) internal successors, (1784), 34 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:27,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:27,472 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:27,473 INFO L186 Difference]: Start difference. First operand has 276 places, 218 transitions, 1759 flow. Second operand 34 states and 1784 transitions. [2021-11-19 05:06:27,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 249 transitions, 2405 flow [2021-11-19 05:06:27,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 249 transitions, 2130 flow, removed 26 selfloop flow, removed 39 redundant places. [2021-11-19 05:06:27,500 INFO L242 Difference]: Finished difference. Result has 263 places, 217 transitions, 1699 flow [2021-11-19 05:06:27,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1699, PETRI_PLACES=263, PETRI_TRANSITIONS=217} [2021-11-19 05:06:27,501 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 175 predicate places. [2021-11-19 05:06:27,502 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 217 transitions, 1699 flow [2021-11-19 05:06:27,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:27,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:27,503 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:27,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-19 05:06:27,503 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2062239298, now seen corresponding path program 39 times [2021-11-19 05:06:27,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:27,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521494619] [2021-11-19 05:06:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:27,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:28,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:28,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521494619] [2021-11-19 05:06:28,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521494619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:28,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:28,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:06:28,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082464761] [2021-11-19 05:06:28,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:28,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:06:28,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:28,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:06:28,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:06:28,170 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:28,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 217 transitions, 1699 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:28,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:28,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:28,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:29,624 INFO L129 PetriNetUnfolder]: 227/615 cut-off events. [2021-11-19 05:06:29,624 INFO L130 PetriNetUnfolder]: For 3057/3057 co-relation queries the response was YES. [2021-11-19 05:06:29,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3238 conditions, 615 events. 227/615 cut-off events. For 3057/3057 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2734 event pairs, 18 based on Foata normal form. 1/614 useless extension candidates. Maximal degree in co-relation 3163. Up to 424 conditions per place. [2021-11-19 05:06:29,631 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 112 selfloop transitions, 55 changer transitions 33/239 dead transitions. [2021-11-19 05:06:29,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 239 transitions, 2216 flow [2021-11-19 05:06:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:06:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:06:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1628 transitions. [2021-11-19 05:06:29,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5586822237474263 [2021-11-19 05:06:29,635 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1628 transitions. [2021-11-19 05:06:29,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1628 transitions. [2021-11-19 05:06:29,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:29,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1628 transitions. [2021-11-19 05:06:29,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.516129032258064) internal successors, (1628), 31 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:29,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:29,642 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:29,642 INFO L186 Difference]: Start difference. First operand has 263 places, 217 transitions, 1699 flow. Second operand 31 states and 1628 transitions. [2021-11-19 05:06:29,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 239 transitions, 2216 flow [2021-11-19 05:06:29,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 239 transitions, 2013 flow, removed 24 selfloop flow, removed 30 redundant places. [2021-11-19 05:06:29,674 INFO L242 Difference]: Finished difference. Result has 260 places, 196 transitions, 1502 flow [2021-11-19 05:06:29,674 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1502, PETRI_PLACES=260, PETRI_TRANSITIONS=196} [2021-11-19 05:06:29,677 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 172 predicate places. [2021-11-19 05:06:29,678 INFO L470 AbstractCegarLoop]: Abstraction has has 260 places, 196 transitions, 1502 flow [2021-11-19 05:06:29,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:29,678 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:29,679 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:29,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-19 05:06:29,679 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1029196706, now seen corresponding path program 40 times [2021-11-19 05:06:29,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:29,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211677716] [2021-11-19 05:06:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:29,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:30,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:30,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211677716] [2021-11-19 05:06:30,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211677716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:30,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:30,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:06:30,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429395232] [2021-11-19 05:06:30,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:30,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:06:30,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:06:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:06:30,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:30,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 196 transitions, 1502 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:30,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:30,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:30,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:31,762 INFO L129 PetriNetUnfolder]: 260/728 cut-off events. [2021-11-19 05:06:31,762 INFO L130 PetriNetUnfolder]: For 3927/3927 co-relation queries the response was YES. [2021-11-19 05:06:31,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 728 events. 260/728 cut-off events. For 3927/3927 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3602 event pairs, 52 based on Foata normal form. 1/727 useless extension candidates. Maximal degree in co-relation 3677. Up to 435 conditions per place. [2021-11-19 05:06:31,772 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 115 selfloop transitions, 81 changer transitions 45/280 dead transitions. [2021-11-19 05:06:31,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 280 transitions, 2851 flow [2021-11-19 05:06:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:06:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:06:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1965 transitions. [2021-11-19 05:06:31,775 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5649798734905118 [2021-11-19 05:06:31,775 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1965 transitions. [2021-11-19 05:06:31,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1965 transitions. [2021-11-19 05:06:31,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:31,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1965 transitions. [2021-11-19 05:06:31,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.108108108108105) internal successors, (1965), 37 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:31,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:31,779 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:31,779 INFO L186 Difference]: Start difference. First operand has 260 places, 196 transitions, 1502 flow. Second operand 37 states and 1965 transitions. [2021-11-19 05:06:31,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 280 transitions, 2851 flow [2021-11-19 05:06:31,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 280 transitions, 2503 flow, removed 53 selfloop flow, removed 29 redundant places. [2021-11-19 05:06:31,808 INFO L242 Difference]: Finished difference. Result has 257 places, 221 transitions, 1845 flow [2021-11-19 05:06:31,808 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1845, PETRI_PLACES=257, PETRI_TRANSITIONS=221} [2021-11-19 05:06:31,809 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 169 predicate places. [2021-11-19 05:06:31,809 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 221 transitions, 1845 flow [2021-11-19 05:06:31,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:31,810 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:31,810 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:31,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-19 05:06:31,810 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:31,811 INFO L85 PathProgramCache]: Analyzing trace with hash -464531948, now seen corresponding path program 41 times [2021-11-19 05:06:31,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:31,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453296207] [2021-11-19 05:06:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:31,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:32,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:32,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453296207] [2021-11-19 05:06:32,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453296207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:32,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:32,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:32,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780713006] [2021-11-19 05:06:32,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:32,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:32,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:32,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:32,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 221 transitions, 1845 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:32,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:32,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:32,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:33,970 INFO L129 PetriNetUnfolder]: 280/770 cut-off events. [2021-11-19 05:06:33,971 INFO L130 PetriNetUnfolder]: For 5510/5510 co-relation queries the response was YES. [2021-11-19 05:06:33,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4229 conditions, 770 events. 280/770 cut-off events. For 5510/5510 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3738 event pairs, 37 based on Foata normal form. 1/769 useless extension candidates. Maximal degree in co-relation 4146. Up to 482 conditions per place. [2021-11-19 05:06:33,980 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 146 selfloop transitions, 97 changer transitions 22/304 dead transitions. [2021-11-19 05:06:33,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 304 transitions, 3346 flow [2021-11-19 05:06:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:06:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:06:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2071 transitions. [2021-11-19 05:06:33,982 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5649208947081288 [2021-11-19 05:06:33,983 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2071 transitions. [2021-11-19 05:06:33,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2071 transitions. [2021-11-19 05:06:33,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:33,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2071 transitions. [2021-11-19 05:06:33,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.1025641025641) internal successors, (2071), 39 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:33,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:33,990 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:33,990 INFO L186 Difference]: Start difference. First operand has 257 places, 221 transitions, 1845 flow. Second operand 39 states and 2071 transitions. [2021-11-19 05:06:33,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 304 transitions, 3346 flow [2021-11-19 05:06:34,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 304 transitions, 2978 flow, removed 148 selfloop flow, removed 21 redundant places. [2021-11-19 05:06:34,041 INFO L242 Difference]: Finished difference. Result has 277 places, 258 transitions, 2347 flow [2021-11-19 05:06:34,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2347, PETRI_PLACES=277, PETRI_TRANSITIONS=258} [2021-11-19 05:06:34,042 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 189 predicate places. [2021-11-19 05:06:34,043 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 258 transitions, 2347 flow [2021-11-19 05:06:34,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:34,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:34,044 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, 1, 1] [2021-11-19 05:06:34,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-19 05:06:34,044 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1720585070, now seen corresponding path program 42 times [2021-11-19 05:06:34,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:34,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657169722] [2021-11-19 05:06:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:34,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:34,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:34,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657169722] [2021-11-19 05:06:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657169722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:34,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:34,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442900217] [2021-11-19 05:06:34,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:34,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:34,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:34,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:34,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:34,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 258 transitions, 2347 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:34,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:34,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:34,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:35,940 INFO L129 PetriNetUnfolder]: 296/817 cut-off events. [2021-11-19 05:06:35,940 INFO L130 PetriNetUnfolder]: For 7259/7259 co-relation queries the response was YES. [2021-11-19 05:06:35,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 817 events. 296/817 cut-off events. For 7259/7259 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4124 event pairs, 56 based on Foata normal form. 1/816 useless extension candidates. Maximal degree in co-relation 4687. Up to 527 conditions per place. [2021-11-19 05:06:35,948 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 166 selfloop transitions, 79 changer transitions 36/320 dead transitions. [2021-11-19 05:06:35,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 320 transitions, 3625 flow [2021-11-19 05:06:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:06:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:06:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1813 transitions. [2021-11-19 05:06:35,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5672715894868585 [2021-11-19 05:06:35,951 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1813 transitions. [2021-11-19 05:06:35,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1813 transitions. [2021-11-19 05:06:35,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:35,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1813 transitions. [2021-11-19 05:06:35,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.3235294117647) internal successors, (1813), 34 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:35,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:35,955 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:35,955 INFO L186 Difference]: Start difference. First operand has 277 places, 258 transitions, 2347 flow. Second operand 34 states and 1813 transitions. [2021-11-19 05:06:35,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 320 transitions, 3625 flow [2021-11-19 05:06:35,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 320 transitions, 3143 flow, removed 204 selfloop flow, removed 17 redundant places. [2021-11-19 05:06:35,991 INFO L242 Difference]: Finished difference. Result has 301 places, 268 transitions, 2299 flow [2021-11-19 05:06:35,991 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2299, PETRI_PLACES=301, PETRI_TRANSITIONS=268} [2021-11-19 05:06:35,992 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 213 predicate places. [2021-11-19 05:06:35,992 INFO L470 AbstractCegarLoop]: Abstraction has has 301 places, 268 transitions, 2299 flow [2021-11-19 05:06:35,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:35,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:35,992 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:35,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-19 05:06:35,993 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash 681483046, now seen corresponding path program 43 times [2021-11-19 05:06:35,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:35,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80513014] [2021-11-19 05:06:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:35,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:36,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:36,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80513014] [2021-11-19 05:06:36,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80513014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:36,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:36,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:36,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424204866] [2021-11-19 05:06:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:36,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:36,531 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:36,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 268 transitions, 2299 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:36,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:36,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:36,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:38,193 INFO L129 PetriNetUnfolder]: 303/842 cut-off events. [2021-11-19 05:06:38,193 INFO L130 PetriNetUnfolder]: For 8621/8621 co-relation queries the response was YES. [2021-11-19 05:06:38,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 842 events. 303/842 cut-off events. For 8621/8621 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4349 event pairs, 50 based on Foata normal form. 1/841 useless extension candidates. Maximal degree in co-relation 4960. Up to 524 conditions per place. [2021-11-19 05:06:38,205 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 163 selfloop transitions, 91 changer transitions 41/334 dead transitions. [2021-11-19 05:06:38,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 334 transitions, 3654 flow [2021-11-19 05:06:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:06:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:06:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1659 transitions. [2021-11-19 05:06:38,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5693205216197667 [2021-11-19 05:06:38,208 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1659 transitions. [2021-11-19 05:06:38,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1659 transitions. [2021-11-19 05:06:38,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:38,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1659 transitions. [2021-11-19 05:06:38,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.516129032258064) internal successors, (1659), 31 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:38,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:38,212 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:38,212 INFO L186 Difference]: Start difference. First operand has 301 places, 268 transitions, 2299 flow. Second operand 31 states and 1659 transitions. [2021-11-19 05:06:38,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 334 transitions, 3654 flow [2021-11-19 05:06:38,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 334 transitions, 3267 flow, removed 139 selfloop flow, removed 27 redundant places. [2021-11-19 05:06:38,264 INFO L242 Difference]: Finished difference. Result has 308 places, 276 transitions, 2458 flow [2021-11-19 05:06:38,264 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2458, PETRI_PLACES=308, PETRI_TRANSITIONS=276} [2021-11-19 05:06:38,265 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 220 predicate places. [2021-11-19 05:06:38,265 INFO L470 AbstractCegarLoop]: Abstraction has has 308 places, 276 transitions, 2458 flow [2021-11-19 05:06:38,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:38,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:38,266 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:38,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-19 05:06:38,266 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1580493070, now seen corresponding path program 44 times [2021-11-19 05:06:38,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:38,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924294352] [2021-11-19 05:06:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:38,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:38,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:38,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924294352] [2021-11-19 05:06:38,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924294352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:38,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:38,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:06:38,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857503309] [2021-11-19 05:06:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:38,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:06:38,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:06:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:06:38,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:38,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 276 transitions, 2458 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:38,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:38,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:38,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:40,574 INFO L129 PetriNetUnfolder]: 302/850 cut-off events. [2021-11-19 05:06:40,574 INFO L130 PetriNetUnfolder]: For 9188/9188 co-relation queries the response was YES. [2021-11-19 05:06:40,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 850 events. 302/850 cut-off events. For 9188/9188 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4428 event pairs, 47 based on Foata normal form. 1/849 useless extension candidates. Maximal degree in co-relation 5122. Up to 540 conditions per place. [2021-11-19 05:06:40,587 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 162 selfloop transitions, 95 changer transitions 37/333 dead transitions. [2021-11-19 05:06:40,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 333 transitions, 3724 flow [2021-11-19 05:06:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:06:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:06:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1909 transitions. [2021-11-19 05:06:40,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5641252955082743 [2021-11-19 05:06:40,589 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1909 transitions. [2021-11-19 05:06:40,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1909 transitions. [2021-11-19 05:06:40,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:40,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1909 transitions. [2021-11-19 05:06:40,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.02777777777778) internal successors, (1909), 36 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:40,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:40,594 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:40,594 INFO L186 Difference]: Start difference. First operand has 308 places, 276 transitions, 2458 flow. Second operand 36 states and 1909 transitions. [2021-11-19 05:06:40,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 333 transitions, 3724 flow [2021-11-19 05:06:40,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 333 transitions, 3401 flow, removed 114 selfloop flow, removed 28 redundant places. [2021-11-19 05:06:40,654 INFO L242 Difference]: Finished difference. Result has 317 places, 284 transitions, 2660 flow [2021-11-19 05:06:40,655 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2660, PETRI_PLACES=317, PETRI_TRANSITIONS=284} [2021-11-19 05:06:40,655 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 229 predicate places. [2021-11-19 05:06:40,655 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 284 transitions, 2660 flow [2021-11-19 05:06:40,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:40,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:40,656 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, 1, 1] [2021-11-19 05:06:40,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-19 05:06:40,657 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1049874770, now seen corresponding path program 45 times [2021-11-19 05:06:40,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:40,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974323797] [2021-11-19 05:06:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:40,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:41,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:41,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974323797] [2021-11-19 05:06:41,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974323797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:41,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:41,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:41,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241905380] [2021-11-19 05:06:41,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:41,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:41,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:41,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:41,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 284 transitions, 2660 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:41,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:41,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:41,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:43,501 INFO L129 PetriNetUnfolder]: 307/874 cut-off events. [2021-11-19 05:06:43,502 INFO L130 PetriNetUnfolder]: For 9088/9088 co-relation queries the response was YES. [2021-11-19 05:06:43,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5357 conditions, 874 events. 307/874 cut-off events. For 9088/9088 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4617 event pairs, 55 based on Foata normal form. 1/873 useless extension candidates. Maximal degree in co-relation 5253. Up to 571 conditions per place. [2021-11-19 05:06:43,516 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 184 selfloop transitions, 90 changer transitions 31/344 dead transitions. [2021-11-19 05:06:43,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 344 transitions, 3895 flow [2021-11-19 05:06:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:06:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:06:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2011 transitions. [2021-11-19 05:06:43,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.562989921612542 [2021-11-19 05:06:43,519 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2011 transitions. [2021-11-19 05:06:43,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2011 transitions. [2021-11-19 05:06:43,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:43,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2011 transitions. [2021-11-19 05:06:43,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.921052631578945) internal successors, (2011), 38 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:43,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:43,524 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:43,524 INFO L186 Difference]: Start difference. First operand has 317 places, 284 transitions, 2660 flow. Second operand 38 states and 2011 transitions. [2021-11-19 05:06:43,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 344 transitions, 3895 flow [2021-11-19 05:06:43,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 344 transitions, 3663 flow, removed 62 selfloop flow, removed 31 redundant places. [2021-11-19 05:06:43,586 INFO L242 Difference]: Finished difference. Result has 328 places, 299 transitions, 2908 flow [2021-11-19 05:06:43,586 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2908, PETRI_PLACES=328, PETRI_TRANSITIONS=299} [2021-11-19 05:06:43,587 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 240 predicate places. [2021-11-19 05:06:43,587 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 299 transitions, 2908 flow [2021-11-19 05:06:43,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:43,588 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:43,588 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:43,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-19 05:06:43,588 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1079355796, now seen corresponding path program 46 times [2021-11-19 05:06:43,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:43,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591827043] [2021-11-19 05:06:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:43,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:44,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:44,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591827043] [2021-11-19 05:06:44,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591827043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:44,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:44,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:44,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518230698] [2021-11-19 05:06:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:44,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:44,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:44,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:44,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 299 transitions, 2908 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:44,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:44,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:44,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:45,861 INFO L129 PetriNetUnfolder]: 313/888 cut-off events. [2021-11-19 05:06:45,861 INFO L130 PetriNetUnfolder]: For 9513/9513 co-relation queries the response was YES. [2021-11-19 05:06:45,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5583 conditions, 888 events. 313/888 cut-off events. For 9513/9513 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4711 event pairs, 56 based on Foata normal form. 1/887 useless extension candidates. Maximal degree in co-relation 5474. Up to 576 conditions per place. [2021-11-19 05:06:45,876 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 189 selfloop transitions, 89 changer transitions 38/355 dead transitions. [2021-11-19 05:06:45,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 355 transitions, 4116 flow [2021-11-19 05:06:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:06:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:06:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1858 transitions. [2021-11-19 05:06:45,878 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.564741641337386 [2021-11-19 05:06:45,878 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1858 transitions. [2021-11-19 05:06:45,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1858 transitions. [2021-11-19 05:06:45,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:45,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1858 transitions. [2021-11-19 05:06:45,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.08571428571429) internal successors, (1858), 35 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:45,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:45,885 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:45,885 INFO L186 Difference]: Start difference. First operand has 328 places, 299 transitions, 2908 flow. Second operand 35 states and 1858 transitions. [2021-11-19 05:06:45,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 355 transitions, 4116 flow [2021-11-19 05:06:45,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 355 transitions, 3844 flow, removed 78 selfloop flow, removed 28 redundant places. [2021-11-19 05:06:45,949 INFO L242 Difference]: Finished difference. Result has 341 places, 305 transitions, 3011 flow [2021-11-19 05:06:45,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2664, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3011, PETRI_PLACES=341, PETRI_TRANSITIONS=305} [2021-11-19 05:06:45,950 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 253 predicate places. [2021-11-19 05:06:45,950 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 305 transitions, 3011 flow [2021-11-19 05:06:45,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:45,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:45,951 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:45,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-19 05:06:45,951 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1197010018, now seen corresponding path program 47 times [2021-11-19 05:06:45,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:45,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791014253] [2021-11-19 05:06:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:45,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:46,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:46,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791014253] [2021-11-19 05:06:46,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791014253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:46,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:46,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:06:46,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233810553] [2021-11-19 05:06:46,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:46,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:06:46,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:06:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:06:46,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:46,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 305 transitions, 3011 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:46,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:46,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:46,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:48,179 INFO L129 PetriNetUnfolder]: 311/886 cut-off events. [2021-11-19 05:06:48,179 INFO L130 PetriNetUnfolder]: For 9682/9682 co-relation queries the response was YES. [2021-11-19 05:06:48,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5662 conditions, 886 events. 311/886 cut-off events. For 9682/9682 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4701 event pairs, 64 based on Foata normal form. 1/885 useless extension candidates. Maximal degree in co-relation 5547. Up to 573 conditions per place. [2021-11-19 05:06:48,194 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 183 selfloop transitions, 98 changer transitions 34/354 dead transitions. [2021-11-19 05:06:48,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 354 transitions, 4195 flow [2021-11-19 05:06:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:06:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:06:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1908 transitions. [2021-11-19 05:06:48,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2021-11-19 05:06:48,201 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1908 transitions. [2021-11-19 05:06:48,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1908 transitions. [2021-11-19 05:06:48,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:48,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1908 transitions. [2021-11-19 05:06:48,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.0) internal successors, (1908), 36 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:48,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:48,210 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:48,210 INFO L186 Difference]: Start difference. First operand has 341 places, 305 transitions, 3011 flow. Second operand 36 states and 1908 transitions. [2021-11-19 05:06:48,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 354 transitions, 4195 flow [2021-11-19 05:06:48,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 354 transitions, 3970 flow, removed 59 selfloop flow, removed 27 redundant places. [2021-11-19 05:06:48,322 INFO L242 Difference]: Finished difference. Result has 353 places, 308 transitions, 3185 flow [2021-11-19 05:06:48,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3185, PETRI_PLACES=353, PETRI_TRANSITIONS=308} [2021-11-19 05:06:48,323 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 265 predicate places. [2021-11-19 05:06:48,323 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 308 transitions, 3185 flow [2021-11-19 05:06:48,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:48,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:48,324 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:48,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-19 05:06:48,325 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:48,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1004088360, now seen corresponding path program 48 times [2021-11-19 05:06:48,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:48,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635962702] [2021-11-19 05:06:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:48,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:48,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:48,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635962702] [2021-11-19 05:06:48,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635962702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:48,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:48,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:06:48,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990518406] [2021-11-19 05:06:48,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:48,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:06:48,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:48,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:06:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:06:48,966 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:48,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 308 transitions, 3185 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:48,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:48,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:48,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:51,458 INFO L129 PetriNetUnfolder]: 355/1003 cut-off events. [2021-11-19 05:06:51,459 INFO L130 PetriNetUnfolder]: For 12260/12260 co-relation queries the response was YES. [2021-11-19 05:06:51,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6550 conditions, 1003 events. 355/1003 cut-off events. For 12260/12260 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 5489 event pairs, 43 based on Foata normal form. 1/1002 useless extension candidates. Maximal degree in co-relation 6432. Up to 617 conditions per place. [2021-11-19 05:06:51,485 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 213 selfloop transitions, 157 changer transitions 22/431 dead transitions. [2021-11-19 05:06:51,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 431 transitions, 5500 flow [2021-11-19 05:06:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-19 05:06:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-11-19 05:06:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2728 transitions. [2021-11-19 05:06:51,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.55810147299509 [2021-11-19 05:06:51,490 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2728 transitions. [2021-11-19 05:06:51,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2728 transitions. [2021-11-19 05:06:51,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:51,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2728 transitions. [2021-11-19 05:06:51,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 52.46153846153846) internal successors, (2728), 52 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:51,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 94.0) internal successors, (4982), 53 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:51,502 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 94.0) internal successors, (4982), 53 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:51,502 INFO L186 Difference]: Start difference. First operand has 353 places, 308 transitions, 3185 flow. Second operand 52 states and 2728 transitions. [2021-11-19 05:06:51,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 431 transitions, 5500 flow [2021-11-19 05:06:51,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 431 transitions, 5144 flow, removed 99 selfloop flow, removed 32 redundant places. [2021-11-19 05:06:51,612 INFO L242 Difference]: Finished difference. Result has 381 places, 392 transitions, 4493 flow [2021-11-19 05:06:51,613 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4493, PETRI_PLACES=381, PETRI_TRANSITIONS=392} [2021-11-19 05:06:51,614 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 293 predicate places. [2021-11-19 05:06:51,614 INFO L470 AbstractCegarLoop]: Abstraction has has 381 places, 392 transitions, 4493 flow [2021-11-19 05:06:51,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:51,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:51,615 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:51,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-19 05:06:51,615 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -232584376, now seen corresponding path program 49 times [2021-11-19 05:06:51,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:51,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117570470] [2021-11-19 05:06:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:51,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:52,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:52,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117570470] [2021-11-19 05:06:52,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117570470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:52,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:52,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:52,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176950300] [2021-11-19 05:06:52,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:52,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:52,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:52,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:52,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 392 transitions, 4493 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:52,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:52,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:52,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:54,368 INFO L129 PetriNetUnfolder]: 360/1003 cut-off events. [2021-11-19 05:06:54,368 INFO L130 PetriNetUnfolder]: For 13633/13633 co-relation queries the response was YES. [2021-11-19 05:06:54,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6999 conditions, 1003 events. 360/1003 cut-off events. For 13633/13633 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5603 event pairs, 35 based on Foata normal form. 1/1002 useless extension candidates. Maximal degree in co-relation 6872. Up to 673 conditions per place. [2021-11-19 05:06:54,387 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 266 selfloop transitions, 106 changer transitions 31/442 dead transitions. [2021-11-19 05:06:54,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 442 transitions, 5895 flow [2021-11-19 05:06:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:06:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:06:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2066 transitions. [2021-11-19 05:06:54,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.563557010365521 [2021-11-19 05:06:54,389 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2066 transitions. [2021-11-19 05:06:54,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2066 transitions. [2021-11-19 05:06:54,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:54,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2066 transitions. [2021-11-19 05:06:54,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.97435897435897) internal successors, (2066), 39 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:54,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:54,395 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:54,395 INFO L186 Difference]: Start difference. First operand has 381 places, 392 transitions, 4493 flow. Second operand 39 states and 2066 transitions. [2021-11-19 05:06:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 442 transitions, 5895 flow [2021-11-19 05:06:54,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 442 transitions, 5142 flow, removed 325 selfloop flow, removed 21 redundant places. [2021-11-19 05:06:54,523 INFO L242 Difference]: Finished difference. Result has 402 places, 395 transitions, 4107 flow [2021-11-19 05:06:54,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4107, PETRI_PLACES=402, PETRI_TRANSITIONS=395} [2021-11-19 05:06:54,525 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 314 predicate places. [2021-11-19 05:06:54,525 INFO L470 AbstractCegarLoop]: Abstraction has has 402 places, 395 transitions, 4107 flow [2021-11-19 05:06:54,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:54,526 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:54,526 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:54,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-19 05:06:54,527 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:54,527 INFO L85 PathProgramCache]: Analyzing trace with hash 647155168, now seen corresponding path program 50 times [2021-11-19 05:06:54,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:54,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711309098] [2021-11-19 05:06:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:54,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:55,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:55,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711309098] [2021-11-19 05:06:55,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711309098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:55,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:55,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:06:55,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846220448] [2021-11-19 05:06:55,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:55,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:55,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:55,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:06:55,058 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:55,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 395 transitions, 4107 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:55,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:55,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:55,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:56,921 INFO L129 PetriNetUnfolder]: 354/1011 cut-off events. [2021-11-19 05:06:56,922 INFO L130 PetriNetUnfolder]: For 12591/12591 co-relation queries the response was YES. [2021-11-19 05:06:56,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6736 conditions, 1011 events. 354/1011 cut-off events. For 12591/12591 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5701 event pairs, 44 based on Foata normal form. 1/1010 useless extension candidates. Maximal degree in co-relation 6603. Up to 697 conditions per place. [2021-11-19 05:06:56,937 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 276 selfloop transitions, 83 changer transitions 36/434 dead transitions. [2021-11-19 05:06:56,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 434 transitions, 5264 flow [2021-11-19 05:06:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:06:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:06:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1857 transitions. [2021-11-19 05:06:56,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644376899696049 [2021-11-19 05:06:56,939 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1857 transitions. [2021-11-19 05:06:56,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1857 transitions. [2021-11-19 05:06:56,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:56,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1857 transitions. [2021-11-19 05:06:56,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.05714285714286) internal successors, (1857), 35 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:56,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:56,944 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:56,944 INFO L186 Difference]: Start difference. First operand has 402 places, 395 transitions, 4107 flow. Second operand 35 states and 1857 transitions. [2021-11-19 05:06:56,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 434 transitions, 5264 flow [2021-11-19 05:06:57,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 434 transitions, 4998 flow, removed 55 selfloop flow, removed 35 redundant places. [2021-11-19 05:06:57,049 INFO L242 Difference]: Finished difference. Result has 405 places, 388 transitions, 4034 flow [2021-11-19 05:06:57,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3863, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4034, PETRI_PLACES=405, PETRI_TRANSITIONS=388} [2021-11-19 05:06:57,051 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 317 predicate places. [2021-11-19 05:06:57,051 INFO L470 AbstractCegarLoop]: Abstraction has has 405 places, 388 transitions, 4034 flow [2021-11-19 05:06:57,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:57,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:57,051 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:57,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-19 05:06:57,051 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -396561566, now seen corresponding path program 51 times [2021-11-19 05:06:57,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:57,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919371901] [2021-11-19 05:06:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:57,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:06:57,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:57,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919371901] [2021-11-19 05:06:57,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919371901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:06:57,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:06:57,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:06:57,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270622334] [2021-11-19 05:06:57,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:06:57,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:06:57,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:06:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:06:57,663 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:06:57,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 388 transitions, 4034 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:57,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:06:57,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:06:57,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:06:59,424 INFO L129 PetriNetUnfolder]: 358/1033 cut-off events. [2021-11-19 05:06:59,424 INFO L130 PetriNetUnfolder]: For 12496/12496 co-relation queries the response was YES. [2021-11-19 05:06:59,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 1033 events. 358/1033 cut-off events. For 12496/12496 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5903 event pairs, 46 based on Foata normal form. 1/1032 useless extension candidates. Maximal degree in co-relation 6728. Up to 684 conditions per place. [2021-11-19 05:06:59,441 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 274 selfloop transitions, 104 changer transitions 30/447 dead transitions. [2021-11-19 05:06:59,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 447 transitions, 5585 flow [2021-11-19 05:06:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:06:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:06:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1814 transitions. [2021-11-19 05:06:59,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.567584480600751 [2021-11-19 05:06:59,444 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1814 transitions. [2021-11-19 05:06:59,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1814 transitions. [2021-11-19 05:06:59,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:06:59,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1814 transitions. [2021-11-19 05:06:59,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.35294117647059) internal successors, (1814), 34 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:59,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:59,448 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:59,448 INFO L186 Difference]: Start difference. First operand has 405 places, 388 transitions, 4034 flow. Second operand 34 states and 1814 transitions. [2021-11-19 05:06:59,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 447 transitions, 5585 flow [2021-11-19 05:06:59,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 447 transitions, 5327 flow, removed 39 selfloop flow, removed 36 redundant places. [2021-11-19 05:06:59,550 INFO L242 Difference]: Finished difference. Result has 399 places, 401 transitions, 4329 flow [2021-11-19 05:06:59,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3828, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4329, PETRI_PLACES=399, PETRI_TRANSITIONS=401} [2021-11-19 05:06:59,552 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 311 predicate places. [2021-11-19 05:06:59,552 INFO L470 AbstractCegarLoop]: Abstraction has has 399 places, 401 transitions, 4329 flow [2021-11-19 05:06:59,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:06:59,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:06:59,553 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:59,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-19 05:06:59,553 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:06:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash -981120510, now seen corresponding path program 52 times [2021-11-19 05:06:59,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:59,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175105227] [2021-11-19 05:06:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:59,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:00,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:00,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175105227] [2021-11-19 05:07:00,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175105227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:00,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:00,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:07:00,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522261389] [2021-11-19 05:07:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:00,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:07:00,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:07:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:07:00,074 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:00,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 401 transitions, 4329 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:00,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:00,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:00,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:02,658 INFO L129 PetriNetUnfolder]: 393/1137 cut-off events. [2021-11-19 05:07:02,658 INFO L130 PetriNetUnfolder]: For 15009/15009 co-relation queries the response was YES. [2021-11-19 05:07:02,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7619 conditions, 1137 events. 393/1137 cut-off events. For 15009/15009 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6694 event pairs, 42 based on Foata normal form. 1/1136 useless extension candidates. Maximal degree in co-relation 7486. Up to 661 conditions per place. [2021-11-19 05:07:02,679 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 241 selfloop transitions, 201 changer transitions 23/504 dead transitions. [2021-11-19 05:07:02,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 504 transitions, 6697 flow [2021-11-19 05:07:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 05:07:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-11-19 05:07:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2426 transitions. [2021-11-19 05:07:02,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.561054579093432 [2021-11-19 05:07:02,682 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2426 transitions. [2021-11-19 05:07:02,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2426 transitions. [2021-11-19 05:07:02,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:02,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2426 transitions. [2021-11-19 05:07:02,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.73913043478261) internal successors, (2426), 46 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:02,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:02,688 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:02,688 INFO L186 Difference]: Start difference. First operand has 399 places, 401 transitions, 4329 flow. Second operand 46 states and 2426 transitions. [2021-11-19 05:07:02,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 504 transitions, 6697 flow [2021-11-19 05:07:02,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 504 transitions, 6344 flow, removed 114 selfloop flow, removed 28 redundant places. [2021-11-19 05:07:02,833 INFO L242 Difference]: Finished difference. Result has 422 places, 455 transitions, 5496 flow [2021-11-19 05:07:02,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5496, PETRI_PLACES=422, PETRI_TRANSITIONS=455} [2021-11-19 05:07:02,834 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 334 predicate places. [2021-11-19 05:07:02,834 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 455 transitions, 5496 flow [2021-11-19 05:07:02,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:02,835 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:02,835 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:02,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-19 05:07:02,835 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 548224926, now seen corresponding path program 53 times [2021-11-19 05:07:02,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:02,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464983968] [2021-11-19 05:07:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:02,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:03,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:03,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464983968] [2021-11-19 05:07:03,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464983968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:03,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:07:03,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481284648] [2021-11-19 05:07:03,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:03,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:07:03,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:07:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:07:03,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:03,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 455 transitions, 5496 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:03,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:03,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:03,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:05,475 INFO L129 PetriNetUnfolder]: 403/1167 cut-off events. [2021-11-19 05:07:05,475 INFO L130 PetriNetUnfolder]: For 17388/17388 co-relation queries the response was YES. [2021-11-19 05:07:05,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8346 conditions, 1167 events. 403/1167 cut-off events. For 17388/17388 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7041 event pairs, 33 based on Foata normal form. 1/1166 useless extension candidates. Maximal degree in co-relation 8207. Up to 756 conditions per place. [2021-11-19 05:07:05,500 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 307 selfloop transitions, 140 changer transitions 30/516 dead transitions. [2021-11-19 05:07:05,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 516 transitions, 7358 flow [2021-11-19 05:07:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:07:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-19 05:07:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2168 transitions. [2021-11-19 05:07:05,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625324338349766 [2021-11-19 05:07:05,503 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2168 transitions. [2021-11-19 05:07:05,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2168 transitions. [2021-11-19 05:07:05,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:05,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2168 transitions. [2021-11-19 05:07:05,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.8780487804878) internal successors, (2168), 41 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:05,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:05,510 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:05,510 INFO L186 Difference]: Start difference. First operand has 422 places, 455 transitions, 5496 flow. Second operand 41 states and 2168 transitions. [2021-11-19 05:07:05,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 516 transitions, 7358 flow [2021-11-19 05:07:05,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 516 transitions, 6741 flow, removed 245 selfloop flow, removed 28 redundant places. [2021-11-19 05:07:05,737 INFO L242 Difference]: Finished difference. Result has 439 places, 468 transitions, 5641 flow [2021-11-19 05:07:05,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5641, PETRI_PLACES=439, PETRI_TRANSITIONS=468} [2021-11-19 05:07:05,738 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 351 predicate places. [2021-11-19 05:07:05,739 INFO L470 AbstractCegarLoop]: Abstraction has has 439 places, 468 transitions, 5641 flow [2021-11-19 05:07:05,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:05,739 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:05,739 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:05,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-19 05:07:05,739 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash 994369812, now seen corresponding path program 54 times [2021-11-19 05:07:05,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:05,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862869832] [2021-11-19 05:07:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:05,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:06,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:06,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862869832] [2021-11-19 05:07:06,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862869832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:06,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:06,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:07:06,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883857920] [2021-11-19 05:07:06,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:06,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:07:06,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:07:06,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:07:06,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:06,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 468 transitions, 5641 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:06,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:06,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:06,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:08,417 INFO L129 PetriNetUnfolder]: 407/1160 cut-off events. [2021-11-19 05:07:08,417 INFO L130 PetriNetUnfolder]: For 17119/17119 co-relation queries the response was YES. [2021-11-19 05:07:08,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8389 conditions, 1160 events. 407/1160 cut-off events. For 17119/17119 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6955 event pairs, 35 based on Foata normal form. 1/1159 useless extension candidates. Maximal degree in co-relation 8244. Up to 797 conditions per place. [2021-11-19 05:07:08,450 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 341 selfloop transitions, 114 changer transitions 31/525 dead transitions. [2021-11-19 05:07:08,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 525 transitions, 7413 flow [2021-11-19 05:07:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:07:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:07:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2067 transitions. [2021-11-19 05:07:08,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2021-11-19 05:07:08,454 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2067 transitions. [2021-11-19 05:07:08,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2067 transitions. [2021-11-19 05:07:08,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:08,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2067 transitions. [2021-11-19 05:07:08,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.0) internal successors, (2067), 39 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:08,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:08,463 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:08,463 INFO L186 Difference]: Start difference. First operand has 439 places, 468 transitions, 5641 flow. Second operand 39 states and 2067 transitions. [2021-11-19 05:07:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 525 transitions, 7413 flow [2021-11-19 05:07:08,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 525 transitions, 7006 flow, removed 118 selfloop flow, removed 36 redundant places. [2021-11-19 05:07:08,704 INFO L242 Difference]: Finished difference. Result has 447 places, 478 transitions, 5819 flow [2021-11-19 05:07:08,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5819, PETRI_PLACES=447, PETRI_TRANSITIONS=478} [2021-11-19 05:07:08,705 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 359 predicate places. [2021-11-19 05:07:08,705 INFO L470 AbstractCegarLoop]: Abstraction has has 447 places, 478 transitions, 5819 flow [2021-11-19 05:07:08,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:08,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:08,706 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, 1, 1] [2021-11-19 05:07:08,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-19 05:07:08,707 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash -28124160, now seen corresponding path program 55 times [2021-11-19 05:07:08,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:08,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703055878] [2021-11-19 05:07:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:08,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:09,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:09,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703055878] [2021-11-19 05:07:09,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703055878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:09,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:09,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:07:09,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832635988] [2021-11-19 05:07:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:09,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:07:09,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:07:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:07:09,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:09,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 478 transitions, 5819 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:09,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:09,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:09,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:11,282 INFO L129 PetriNetUnfolder]: 403/1178 cut-off events. [2021-11-19 05:07:11,282 INFO L130 PetriNetUnfolder]: For 14981/14981 co-relation queries the response was YES. [2021-11-19 05:07:11,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8241 conditions, 1178 events. 403/1178 cut-off events. For 14981/14981 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7170 event pairs, 36 based on Foata normal form. 1/1177 useless extension candidates. Maximal degree in co-relation 8091. Up to 801 conditions per place. [2021-11-19 05:07:11,305 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 348 selfloop transitions, 96 changer transitions 36/519 dead transitions. [2021-11-19 05:07:11,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 519 transitions, 7192 flow [2021-11-19 05:07:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:07:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:07:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1910 transitions. [2021-11-19 05:07:11,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644208037825059 [2021-11-19 05:07:11,307 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1910 transitions. [2021-11-19 05:07:11,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1910 transitions. [2021-11-19 05:07:11,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:11,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1910 transitions. [2021-11-19 05:07:11,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.05555555555556) internal successors, (1910), 36 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:11,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:11,312 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:11,312 INFO L186 Difference]: Start difference. First operand has 447 places, 478 transitions, 5819 flow. Second operand 36 states and 1910 transitions. [2021-11-19 05:07:11,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 519 transitions, 7192 flow [2021-11-19 05:07:11,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 519 transitions, 6862 flow, removed 93 selfloop flow, removed 29 redundant places. [2021-11-19 05:07:11,499 INFO L242 Difference]: Finished difference. Result has 456 places, 471 transitions, 5717 flow [2021-11-19 05:07:11,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5717, PETRI_PLACES=456, PETRI_TRANSITIONS=471} [2021-11-19 05:07:11,500 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 368 predicate places. [2021-11-19 05:07:11,501 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 471 transitions, 5717 flow [2021-11-19 05:07:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:11,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:11,501 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:11,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-19 05:07:11,502 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1807152066, now seen corresponding path program 56 times [2021-11-19 05:07:11,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:11,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14844846] [2021-11-19 05:07:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:11,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:12,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:12,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14844846] [2021-11-19 05:07:12,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14844846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:12,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:12,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:07:12,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570423212] [2021-11-19 05:07:12,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:12,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:07:12,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:07:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:07:12,170 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:12,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 471 transitions, 5717 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:12,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:12,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:12,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:14,891 INFO L129 PetriNetUnfolder]: 405/1163 cut-off events. [2021-11-19 05:07:14,891 INFO L130 PetriNetUnfolder]: For 15219/15219 co-relation queries the response was YES. [2021-11-19 05:07:14,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8350 conditions, 1163 events. 405/1163 cut-off events. For 15219/15219 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6991 event pairs, 34 based on Foata normal form. 1/1161 useless extension candidates. Maximal degree in co-relation 8198. Up to 757 conditions per place. [2021-11-19 05:07:14,917 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 304 selfloop transitions, 155 changer transitions 31/529 dead transitions. [2021-11-19 05:07:14,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 529 transitions, 7524 flow [2021-11-19 05:07:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 05:07:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-19 05:07:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2471 transitions. [2021-11-19 05:07:14,919 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5593028519692168 [2021-11-19 05:07:14,920 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2471 transitions. [2021-11-19 05:07:14,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2471 transitions. [2021-11-19 05:07:14,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:14,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2471 transitions. [2021-11-19 05:07:14,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 52.57446808510638) internal successors, (2471), 47 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:14,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:14,930 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:14,930 INFO L186 Difference]: Start difference. First operand has 456 places, 471 transitions, 5717 flow. Second operand 47 states and 2471 transitions. [2021-11-19 05:07:14,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 529 transitions, 7524 flow [2021-11-19 05:07:15,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 529 transitions, 7222 flow, removed 34 selfloop flow, removed 38 redundant places. [2021-11-19 05:07:15,193 INFO L242 Difference]: Finished difference. Result has 464 places, 481 transitions, 6096 flow [2021-11-19 05:07:15,193 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5455, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=6096, PETRI_PLACES=464, PETRI_TRANSITIONS=481} [2021-11-19 05:07:15,194 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 376 predicate places. [2021-11-19 05:07:15,194 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 481 transitions, 6096 flow [2021-11-19 05:07:15,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:15,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:15,195 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:15,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-19 05:07:15,196 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:15,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1146638190, now seen corresponding path program 57 times [2021-11-19 05:07:15,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:15,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308933265] [2021-11-19 05:07:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:15,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:15,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:15,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308933265] [2021-11-19 05:07:15,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308933265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:15,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:15,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:07:15,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934303167] [2021-11-19 05:07:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:15,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:07:15,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:07:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:07:15,769 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:15,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 481 transitions, 6096 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:15,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:15,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:15,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:19,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:07:21,049 INFO L129 PetriNetUnfolder]: 400/1179 cut-off events. [2021-11-19 05:07:21,049 INFO L130 PetriNetUnfolder]: For 15491/15491 co-relation queries the response was YES. [2021-11-19 05:07:21,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8411 conditions, 1179 events. 400/1179 cut-off events. For 15491/15491 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7229 event pairs, 44 based on Foata normal form. 1/1178 useless extension candidates. Maximal degree in co-relation 8259. Up to 767 conditions per place. [2021-11-19 05:07:21,069 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 319 selfloop transitions, 126 changer transitions 36/520 dead transitions. [2021-11-19 05:07:21,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 520 transitions, 7466 flow [2021-11-19 05:07:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:07:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-19 05:07:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2314 transitions. [2021-11-19 05:07:21,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.559477756286267 [2021-11-19 05:07:21,072 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2314 transitions. [2021-11-19 05:07:21,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2314 transitions. [2021-11-19 05:07:21,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:21,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2314 transitions. [2021-11-19 05:07:21,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.59090909090909) internal successors, (2314), 44 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:21,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:21,078 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:21,078 INFO L186 Difference]: Start difference. First operand has 464 places, 481 transitions, 6096 flow. Second operand 44 states and 2314 transitions. [2021-11-19 05:07:21,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 520 transitions, 7466 flow [2021-11-19 05:07:21,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 520 transitions, 7047 flow, removed 111 selfloop flow, removed 37 redundant places. [2021-11-19 05:07:21,282 INFO L242 Difference]: Finished difference. Result has 472 places, 473 transitions, 5977 flow [2021-11-19 05:07:21,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5977, PETRI_PLACES=472, PETRI_TRANSITIONS=473} [2021-11-19 05:07:21,283 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 384 predicate places. [2021-11-19 05:07:21,284 INFO L470 AbstractCegarLoop]: Abstraction has has 472 places, 473 transitions, 5977 flow [2021-11-19 05:07:21,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:21,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:21,285 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:21,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-19 05:07:21,285 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2086011520, now seen corresponding path program 58 times [2021-11-19 05:07:21,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:21,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057857705] [2021-11-19 05:07:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:21,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:21,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:21,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057857705] [2021-11-19 05:07:21,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057857705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:21,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:21,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:07:21,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810713088] [2021-11-19 05:07:21,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:21,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:07:21,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:07:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:07:21,957 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:21,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 473 transitions, 5977 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:21,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:21,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:21,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:24,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:07:26,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:07:28,441 INFO L129 PetriNetUnfolder]: 434/1312 cut-off events. [2021-11-19 05:07:28,441 INFO L130 PetriNetUnfolder]: For 16008/16008 co-relation queries the response was YES. [2021-11-19 05:07:28,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9119 conditions, 1312 events. 434/1312 cut-off events. For 16008/16008 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8372 event pairs, 45 based on Foata normal form. 1/1311 useless extension candidates. Maximal degree in co-relation 8966. Up to 790 conditions per place. [2021-11-19 05:07:28,468 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 338 selfloop transitions, 187 changer transitions 22/586 dead transitions. [2021-11-19 05:07:28,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 586 transitions, 8494 flow [2021-11-19 05:07:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 05:07:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-11-19 05:07:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2575 transitions. [2021-11-19 05:07:28,471 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5590534085974815 [2021-11-19 05:07:28,471 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2575 transitions. [2021-11-19 05:07:28,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2575 transitions. [2021-11-19 05:07:28,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:28,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2575 transitions. [2021-11-19 05:07:28,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 52.55102040816327) internal successors, (2575), 49 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:28,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:28,478 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:28,478 INFO L186 Difference]: Start difference. First operand has 472 places, 473 transitions, 5977 flow. Second operand 49 states and 2575 transitions. [2021-11-19 05:07:28,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 586 transitions, 8494 flow [2021-11-19 05:07:28,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 586 transitions, 8096 flow, removed 35 selfloop flow, removed 45 redundant places. [2021-11-19 05:07:28,670 INFO L242 Difference]: Finished difference. Result has 473 places, 539 transitions, 7115 flow [2021-11-19 05:07:28,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7115, PETRI_PLACES=473, PETRI_TRANSITIONS=539} [2021-11-19 05:07:28,671 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 385 predicate places. [2021-11-19 05:07:28,671 INFO L470 AbstractCegarLoop]: Abstraction has has 473 places, 539 transitions, 7115 flow [2021-11-19 05:07:28,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:28,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:28,672 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:28,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-19 05:07:28,672 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1493851642, now seen corresponding path program 59 times [2021-11-19 05:07:28,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:28,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935026089] [2021-11-19 05:07:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:28,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:29,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:29,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935026089] [2021-11-19 05:07:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935026089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:29,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:29,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:07:29,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787883943] [2021-11-19 05:07:29,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:29,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:07:29,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:29,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:07:29,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:07:29,243 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:29,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 539 transitions, 7115 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:29,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:29,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:29,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:31,253 INFO L129 PetriNetUnfolder]: 437/1328 cut-off events. [2021-11-19 05:07:31,253 INFO L130 PetriNetUnfolder]: For 17954/17954 co-relation queries the response was YES. [2021-11-19 05:07:31,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 1328 events. 437/1328 cut-off events. For 17954/17954 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8589 event pairs, 44 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 9409. Up to 919 conditions per place. [2021-11-19 05:07:31,277 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 422 selfloop transitions, 88 changer transitions 30/579 dead transitions. [2021-11-19 05:07:31,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 579 transitions, 8709 flow [2021-11-19 05:07:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:07:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:07:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1803 transitions. [2021-11-19 05:07:31,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.564142678347935 [2021-11-19 05:07:31,279 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1803 transitions. [2021-11-19 05:07:31,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1803 transitions. [2021-11-19 05:07:31,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:31,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1803 transitions. [2021-11-19 05:07:31,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.029411764705884) internal successors, (1803), 34 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:31,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:31,283 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:31,283 INFO L186 Difference]: Start difference. First operand has 473 places, 539 transitions, 7115 flow. Second operand 34 states and 1803 transitions. [2021-11-19 05:07:31,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 579 transitions, 8709 flow [2021-11-19 05:07:31,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 579 transitions, 8335 flow, removed 106 selfloop flow, removed 33 redundant places. [2021-11-19 05:07:31,495 INFO L242 Difference]: Finished difference. Result has 477 places, 538 transitions, 7026 flow [2021-11-19 05:07:31,495 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6745, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7026, PETRI_PLACES=477, PETRI_TRANSITIONS=538} [2021-11-19 05:07:31,496 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 389 predicate places. [2021-11-19 05:07:31,496 INFO L470 AbstractCegarLoop]: Abstraction has has 477 places, 538 transitions, 7026 flow [2021-11-19 05:07:31,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:31,496 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:31,496 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:31,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-19 05:07:31,496 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash -932836810, now seen corresponding path program 60 times [2021-11-19 05:07:31,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:31,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447544010] [2021-11-19 05:07:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:31,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:32,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:32,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447544010] [2021-11-19 05:07:32,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447544010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:32,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:32,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:07:32,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015791610] [2021-11-19 05:07:32,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:32,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:07:32,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:07:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:07:32,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:32,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 538 transitions, 7026 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:32,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:32,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:32,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:34,035 INFO L129 PetriNetUnfolder]: 439/1347 cut-off events. [2021-11-19 05:07:34,035 INFO L130 PetriNetUnfolder]: For 19808/19808 co-relation queries the response was YES. [2021-11-19 05:07:34,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9811 conditions, 1347 events. 439/1347 cut-off events. For 19808/19808 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8780 event pairs, 50 based on Foata normal form. 1/1346 useless extension candidates. Maximal degree in co-relation 9649. Up to 900 conditions per place. [2021-11-19 05:07:34,066 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 418 selfloop transitions, 106 changer transitions 28/591 dead transitions. [2021-11-19 05:07:34,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 591 transitions, 9031 flow [2021-11-19 05:07:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:07:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:07:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1813 transitions. [2021-11-19 05:07:34,070 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5672715894868585 [2021-11-19 05:07:34,070 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1813 transitions. [2021-11-19 05:07:34,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1813 transitions. [2021-11-19 05:07:34,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:34,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1813 transitions. [2021-11-19 05:07:34,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.3235294117647) internal successors, (1813), 34 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:34,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:34,081 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:34,081 INFO L186 Difference]: Start difference. First operand has 477 places, 538 transitions, 7026 flow. Second operand 34 states and 1813 transitions. [2021-11-19 05:07:34,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 591 transitions, 9031 flow [2021-11-19 05:07:34,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 591 transitions, 8716 flow, removed 70 selfloop flow, removed 32 redundant places. [2021-11-19 05:07:34,398 INFO L242 Difference]: Finished difference. Result has 479 places, 551 transitions, 7334 flow [2021-11-19 05:07:34,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7334, PETRI_PLACES=479, PETRI_TRANSITIONS=551} [2021-11-19 05:07:34,399 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 391 predicate places. [2021-11-19 05:07:34,399 INFO L470 AbstractCegarLoop]: Abstraction has has 479 places, 551 transitions, 7334 flow [2021-11-19 05:07:34,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:34,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:34,400 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:34,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-19 05:07:34,401 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 206855110, now seen corresponding path program 61 times [2021-11-19 05:07:34,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:34,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198559811] [2021-11-19 05:07:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:34,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:35,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:35,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198559811] [2021-11-19 05:07:35,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198559811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:35,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:35,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:07:35,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967556094] [2021-11-19 05:07:35,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:35,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:07:35,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:07:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:07:35,070 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:35,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 551 transitions, 7334 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:35,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:35,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:35,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:37,150 INFO L129 PetriNetUnfolder]: 433/1325 cut-off events. [2021-11-19 05:07:37,150 INFO L130 PetriNetUnfolder]: For 20894/20894 co-relation queries the response was YES. [2021-11-19 05:07:37,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9814 conditions, 1325 events. 433/1325 cut-off events. For 20894/20894 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8542 event pairs, 50 based on Foata normal form. 1/1324 useless extension candidates. Maximal degree in co-relation 9650. Up to 872 conditions per place. [2021-11-19 05:07:37,180 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 406 selfloop transitions, 130 changer transitions 22/597 dead transitions. [2021-11-19 05:07:37,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 597 transitions, 9118 flow [2021-11-19 05:07:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:07:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:07:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1808 transitions. [2021-11-19 05:07:37,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5657071339173968 [2021-11-19 05:07:37,182 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1808 transitions. [2021-11-19 05:07:37,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1808 transitions. [2021-11-19 05:07:37,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:37,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1808 transitions. [2021-11-19 05:07:37,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.1764705882353) internal successors, (1808), 34 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:37,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:37,187 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:37,187 INFO L186 Difference]: Start difference. First operand has 479 places, 551 transitions, 7334 flow. Second operand 34 states and 1808 transitions. [2021-11-19 05:07:37,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 597 transitions, 9118 flow [2021-11-19 05:07:37,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 597 transitions, 8705 flow, removed 123 selfloop flow, removed 27 redundant places. [2021-11-19 05:07:37,411 INFO L242 Difference]: Finished difference. Result has 484 places, 555 transitions, 7376 flow [2021-11-19 05:07:37,412 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6939, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7376, PETRI_PLACES=484, PETRI_TRANSITIONS=555} [2021-11-19 05:07:37,412 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 396 predicate places. [2021-11-19 05:07:37,413 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 555 transitions, 7376 flow [2021-11-19 05:07:37,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:37,413 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:37,413 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:37,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-19 05:07:37,413 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:37,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:37,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1989330444, now seen corresponding path program 62 times [2021-11-19 05:07:37,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:37,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218246155] [2021-11-19 05:07:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:37,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:38,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:38,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218246155] [2021-11-19 05:07:38,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218246155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:38,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:38,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:07:38,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998667224] [2021-11-19 05:07:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:38,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:07:38,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:07:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:07:38,008 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:38,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 555 transitions, 7376 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:38,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:38,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:38,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:41,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:07:43,376 INFO L129 PetriNetUnfolder]: 432/1313 cut-off events. [2021-11-19 05:07:43,376 INFO L130 PetriNetUnfolder]: For 20712/20712 co-relation queries the response was YES. [2021-11-19 05:07:43,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9761 conditions, 1313 events. 432/1313 cut-off events. For 20712/20712 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8418 event pairs, 50 based on Foata normal form. 1/1312 useless extension candidates. Maximal degree in co-relation 9597. Up to 832 conditions per place. [2021-11-19 05:07:43,401 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 394 selfloop transitions, 154 changer transitions 21/608 dead transitions. [2021-11-19 05:07:43,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 608 transitions, 9295 flow [2021-11-19 05:07:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-19 05:07:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-19 05:07:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2824 transitions. [2021-11-19 05:07:43,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5563435776201734 [2021-11-19 05:07:43,405 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2824 transitions. [2021-11-19 05:07:43,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2824 transitions. [2021-11-19 05:07:43,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:43,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2824 transitions. [2021-11-19 05:07:43,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 52.2962962962963) internal successors, (2824), 54 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:43,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 94.0) internal successors, (5170), 55 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:43,418 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 94.0) internal successors, (5170), 55 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:43,418 INFO L186 Difference]: Start difference. First operand has 484 places, 555 transitions, 7376 flow. Second operand 54 states and 2824 transitions. [2021-11-19 05:07:43,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 608 transitions, 9295 flow [2021-11-19 05:07:43,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 608 transitions, 8959 flow, removed 95 selfloop flow, removed 27 redundant places. [2021-11-19 05:07:43,700 INFO L242 Difference]: Finished difference. Result has 515 places, 567 transitions, 7721 flow [2021-11-19 05:07:43,701 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7116, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=7721, PETRI_PLACES=515, PETRI_TRANSITIONS=567} [2021-11-19 05:07:43,701 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 427 predicate places. [2021-11-19 05:07:43,701 INFO L470 AbstractCegarLoop]: Abstraction has has 515 places, 567 transitions, 7721 flow [2021-11-19 05:07:43,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:43,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:43,702 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:43,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-19 05:07:43,702 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:43,703 INFO L85 PathProgramCache]: Analyzing trace with hash -147087234, now seen corresponding path program 63 times [2021-11-19 05:07:43,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:43,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882481413] [2021-11-19 05:07:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:43,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:44,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:44,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882481413] [2021-11-19 05:07:44,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882481413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:44,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:44,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:07:44,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044306492] [2021-11-19 05:07:44,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:44,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:07:44,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:07:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:07:44,292 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:44,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 567 transitions, 7721 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:44,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:44,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:44,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:46,754 INFO L129 PetriNetUnfolder]: 437/1331 cut-off events. [2021-11-19 05:07:46,754 INFO L130 PetriNetUnfolder]: For 20839/20839 co-relation queries the response was YES. [2021-11-19 05:07:46,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9961 conditions, 1331 events. 437/1331 cut-off events. For 20839/20839 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8589 event pairs, 51 based on Foata normal form. 1/1330 useless extension candidates. Maximal degree in co-relation 9791. Up to 939 conditions per place. [2021-11-19 05:07:46,785 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 455 selfloop transitions, 89 changer transitions 26/609 dead transitions. [2021-11-19 05:07:46,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 609 transitions, 9362 flow [2021-11-19 05:07:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:07:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:07:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1951 transitions. [2021-11-19 05:07:46,788 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5609545715928694 [2021-11-19 05:07:46,788 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1951 transitions. [2021-11-19 05:07:46,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1951 transitions. [2021-11-19 05:07:46,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:46,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1951 transitions. [2021-11-19 05:07:46,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.729729729729726) internal successors, (1951), 37 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:46,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:46,793 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:46,793 INFO L186 Difference]: Start difference. First operand has 515 places, 567 transitions, 7721 flow. Second operand 37 states and 1951 transitions. [2021-11-19 05:07:46,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 609 transitions, 9362 flow [2021-11-19 05:07:47,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 609 transitions, 8913 flow, removed 119 selfloop flow, removed 42 redundant places. [2021-11-19 05:07:47,066 INFO L242 Difference]: Finished difference. Result has 512 places, 572 transitions, 7630 flow [2021-11-19 05:07:47,067 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7630, PETRI_PLACES=512, PETRI_TRANSITIONS=572} [2021-11-19 05:07:47,068 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 424 predicate places. [2021-11-19 05:07:47,068 INFO L470 AbstractCegarLoop]: Abstraction has has 512 places, 572 transitions, 7630 flow [2021-11-19 05:07:47,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:47,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:47,069 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:47,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-19 05:07:47,070 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1348611168, now seen corresponding path program 64 times [2021-11-19 05:07:47,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:47,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199348385] [2021-11-19 05:07:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:47,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:47,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:47,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199348385] [2021-11-19 05:07:47,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199348385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:47,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:47,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:07:47,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632725228] [2021-11-19 05:07:47,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:47,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:07:47,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:07:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:07:47,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:47,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 572 transitions, 7630 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:47,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:47,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:47,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:50,006 INFO L129 PetriNetUnfolder]: 451/1369 cut-off events. [2021-11-19 05:07:50,006 INFO L130 PetriNetUnfolder]: For 20949/20949 co-relation queries the response was YES. [2021-11-19 05:07:50,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10285 conditions, 1369 events. 451/1369 cut-off events. For 20949/20949 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8888 event pairs, 51 based on Foata normal form. 1/1367 useless extension candidates. Maximal degree in co-relation 10112. Up to 886 conditions per place. [2021-11-19 05:07:50,042 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 415 selfloop transitions, 162 changer transitions 24/640 dead transitions. [2021-11-19 05:07:50,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 640 transitions, 9877 flow [2021-11-19 05:07:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:07:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:07:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2070 transitions. [2021-11-19 05:07:50,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5646481178396072 [2021-11-19 05:07:50,045 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2070 transitions. [2021-11-19 05:07:50,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2070 transitions. [2021-11-19 05:07:50,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:50,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2070 transitions. [2021-11-19 05:07:50,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.07692307692308) internal successors, (2070), 39 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:50,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:50,051 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:50,051 INFO L186 Difference]: Start difference. First operand has 512 places, 572 transitions, 7630 flow. Second operand 39 states and 2070 transitions. [2021-11-19 05:07:50,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 640 transitions, 9877 flow [2021-11-19 05:07:50,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 640 transitions, 9640 flow, removed 56 selfloop flow, removed 28 redundant places. [2021-11-19 05:07:50,507 INFO L242 Difference]: Finished difference. Result has 524 places, 597 transitions, 8385 flow [2021-11-19 05:07:50,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8385, PETRI_PLACES=524, PETRI_TRANSITIONS=597} [2021-11-19 05:07:50,510 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 436 predicate places. [2021-11-19 05:07:50,511 INFO L470 AbstractCegarLoop]: Abstraction has has 524 places, 597 transitions, 8385 flow [2021-11-19 05:07:50,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:50,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:50,512 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:50,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-19 05:07:50,512 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1205644002, now seen corresponding path program 65 times [2021-11-19 05:07:50,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:50,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853896857] [2021-11-19 05:07:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:50,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:51,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:51,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853896857] [2021-11-19 05:07:51,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853896857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:51,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:51,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:07:51,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26803697] [2021-11-19 05:07:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:51,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:07:51,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:07:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:07:51,175 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:51,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 597 transitions, 8385 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:51,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:51,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:51,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:53,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:07:55,326 INFO L129 PetriNetUnfolder]: 455/1392 cut-off events. [2021-11-19 05:07:55,326 INFO L130 PetriNetUnfolder]: For 22937/22937 co-relation queries the response was YES. [2021-11-19 05:07:55,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10719 conditions, 1392 events. 455/1392 cut-off events. For 22937/22937 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9207 event pairs, 50 based on Foata normal form. 1/1391 useless extension candidates. Maximal degree in co-relation 10540. Up to 954 conditions per place. [2021-11-19 05:07:55,365 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 475 selfloop transitions, 101 changer transitions 27/642 dead transitions. [2021-11-19 05:07:55,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 642 transitions, 10277 flow [2021-11-19 05:07:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:07:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:07:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1705 transitions. [2021-11-19 05:07:55,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5668218085106383 [2021-11-19 05:07:55,367 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1705 transitions. [2021-11-19 05:07:55,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1705 transitions. [2021-11-19 05:07:55,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:55,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1705 transitions. [2021-11-19 05:07:55,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.28125) internal successors, (1705), 32 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:55,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:55,372 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:55,372 INFO L186 Difference]: Start difference. First operand has 524 places, 597 transitions, 8385 flow. Second operand 32 states and 1705 transitions. [2021-11-19 05:07:55,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 642 transitions, 10277 flow [2021-11-19 05:07:55,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 642 transitions, 9938 flow, removed 84 selfloop flow, removed 27 redundant places. [2021-11-19 05:07:55,690 INFO L242 Difference]: Finished difference. Result has 532 places, 604 transitions, 8496 flow [2021-11-19 05:07:55,691 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8058, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8496, PETRI_PLACES=532, PETRI_TRANSITIONS=604} [2021-11-19 05:07:55,691 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 444 predicate places. [2021-11-19 05:07:55,692 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 604 transitions, 8496 flow [2021-11-19 05:07:55,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:55,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:55,692 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:55,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-19 05:07:55,692 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash -124067132, now seen corresponding path program 66 times [2021-11-19 05:07:55,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:55,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848727153] [2021-11-19 05:07:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:55,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:07:56,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:56,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848727153] [2021-11-19 05:07:56,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848727153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:07:56,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:07:56,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:07:56,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158880814] [2021-11-19 05:07:56,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:07:56,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:07:56,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:07:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:07:56,407 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:07:56,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 604 transitions, 8496 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:56,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:07:56,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:07:56,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:07:59,324 INFO L129 PetriNetUnfolder]: 452/1394 cut-off events. [2021-11-19 05:07:59,324 INFO L130 PetriNetUnfolder]: For 22933/22933 co-relation queries the response was YES. [2021-11-19 05:07:59,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10698 conditions, 1394 events. 452/1394 cut-off events. For 22933/22933 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9151 event pairs, 49 based on Foata normal form. 1/1393 useless extension candidates. Maximal degree in co-relation 10515. Up to 935 conditions per place. [2021-11-19 05:07:59,350 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 455 selfloop transitions, 125 changer transitions 29/648 dead transitions. [2021-11-19 05:07:59,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 648 transitions, 10340 flow [2021-11-19 05:07:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:07:59,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:07:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2060 transitions. [2021-11-19 05:07:59,353 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5619203491543917 [2021-11-19 05:07:59,353 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2060 transitions. [2021-11-19 05:07:59,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2060 transitions. [2021-11-19 05:07:59,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:07:59,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2060 transitions. [2021-11-19 05:07:59,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.82051282051282) internal successors, (2060), 39 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:59,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:59,358 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:59,358 INFO L186 Difference]: Start difference. First operand has 532 places, 604 transitions, 8496 flow. Second operand 39 states and 2060 transitions. [2021-11-19 05:07:59,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 648 transitions, 10340 flow [2021-11-19 05:07:59,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 648 transitions, 10082 flow, removed 72 selfloop flow, removed 25 redundant places. [2021-11-19 05:07:59,779 INFO L242 Difference]: Finished difference. Result has 548 places, 604 transitions, 8610 flow [2021-11-19 05:07:59,780 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8266, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8610, PETRI_PLACES=548, PETRI_TRANSITIONS=604} [2021-11-19 05:07:59,781 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 460 predicate places. [2021-11-19 05:07:59,781 INFO L470 AbstractCegarLoop]: Abstraction has has 548 places, 604 transitions, 8610 flow [2021-11-19 05:07:59,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:07:59,782 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:07:59,782 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:59,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-19 05:07:59,782 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:07:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash -510293490, now seen corresponding path program 67 times [2021-11-19 05:07:59,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:59,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200026547] [2021-11-19 05:07:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:59,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:00,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:00,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200026547] [2021-11-19 05:08:00,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200026547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:00,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:00,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:00,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318534727] [2021-11-19 05:08:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:00,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:00,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:00,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:00,364 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:00,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 604 transitions, 8610 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:00,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:00,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:00,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:02,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:08:04,440 INFO L129 PetriNetUnfolder]: 450/1383 cut-off events. [2021-11-19 05:08:04,441 INFO L130 PetriNetUnfolder]: For 24960/24960 co-relation queries the response was YES. [2021-11-19 05:08:04,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10920 conditions, 1383 events. 450/1383 cut-off events. For 24960/24960 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9137 event pairs, 46 based on Foata normal form. 1/1382 useless extension candidates. Maximal degree in co-relation 10734. Up to 963 conditions per place. [2021-11-19 05:08:04,472 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 480 selfloop transitions, 94 changer transitions 31/644 dead transitions. [2021-11-19 05:08:04,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 644 transitions, 10482 flow [2021-11-19 05:08:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:08:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:08:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1851 transitions. [2021-11-19 05:08:04,474 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5626139817629179 [2021-11-19 05:08:04,474 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1851 transitions. [2021-11-19 05:08:04,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1851 transitions. [2021-11-19 05:08:04,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:04,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1851 transitions. [2021-11-19 05:08:04,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.885714285714286) internal successors, (1851), 35 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:04,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:04,479 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:04,479 INFO L186 Difference]: Start difference. First operand has 548 places, 604 transitions, 8610 flow. Second operand 35 states and 1851 transitions. [2021-11-19 05:08:04,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 644 transitions, 10482 flow [2021-11-19 05:08:04,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 644 transitions, 10145 flow, removed 65 selfloop flow, removed 36 redundant places. [2021-11-19 05:08:04,775 INFO L242 Difference]: Finished difference. Result has 550 places, 602 transitions, 8601 flow [2021-11-19 05:08:04,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8311, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8601, PETRI_PLACES=550, PETRI_TRANSITIONS=602} [2021-11-19 05:08:04,776 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 462 predicate places. [2021-11-19 05:08:04,776 INFO L470 AbstractCegarLoop]: Abstraction has has 550 places, 602 transitions, 8601 flow [2021-11-19 05:08:04,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:04,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:04,776 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:04,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-19 05:08:04,777 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash -663964524, now seen corresponding path program 68 times [2021-11-19 05:08:04,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:04,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159009558] [2021-11-19 05:08:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:04,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:05,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:05,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159009558] [2021-11-19 05:08:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159009558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:05,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:05,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:05,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363972083] [2021-11-19 05:08:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:05,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:05,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:05,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:05,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 602 transitions, 8601 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:05,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:05,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:05,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:07,887 INFO L129 PetriNetUnfolder]: 438/1341 cut-off events. [2021-11-19 05:08:07,887 INFO L130 PetriNetUnfolder]: For 23594/23594 co-relation queries the response was YES. [2021-11-19 05:08:07,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10585 conditions, 1341 events. 438/1341 cut-off events. For 23594/23594 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8769 event pairs, 34 based on Foata normal form. 1/1341 useless extension candidates. Maximal degree in co-relation 10398. Up to 928 conditions per place. [2021-11-19 05:08:07,921 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 455 selfloop transitions, 113 changer transitions 25/632 dead transitions. [2021-11-19 05:08:07,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 632 transitions, 10002 flow [2021-11-19 05:08:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:08:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:08:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1953 transitions. [2021-11-19 05:08:07,924 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5615296147211041 [2021-11-19 05:08:07,924 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1953 transitions. [2021-11-19 05:08:07,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1953 transitions. [2021-11-19 05:08:07,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:07,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1953 transitions. [2021-11-19 05:08:07,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.78378378378378) internal successors, (1953), 37 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:07,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:07,929 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:07,929 INFO L186 Difference]: Start difference. First operand has 550 places, 602 transitions, 8601 flow. Second operand 37 states and 1953 transitions. [2021-11-19 05:08:07,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 632 transitions, 10002 flow [2021-11-19 05:08:08,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 632 transitions, 9697 flow, removed 52 selfloop flow, removed 34 redundant places. [2021-11-19 05:08:08,213 INFO L242 Difference]: Finished difference. Result has 549 places, 593 transitions, 8384 flow [2021-11-19 05:08:08,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8308, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8384, PETRI_PLACES=549, PETRI_TRANSITIONS=593} [2021-11-19 05:08:08,215 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 461 predicate places. [2021-11-19 05:08:08,215 INFO L470 AbstractCegarLoop]: Abstraction has has 549 places, 593 transitions, 8384 flow [2021-11-19 05:08:08,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:08,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:08,216 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:08,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-19 05:08:08,216 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1664841278, now seen corresponding path program 69 times [2021-11-19 05:08:08,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:08,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609027514] [2021-11-19 05:08:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:08,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:08,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:08,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609027514] [2021-11-19 05:08:08,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609027514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:08,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:08,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:08:08,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723491322] [2021-11-19 05:08:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:08,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:08:08,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:08:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:08:08,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:08,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 593 transitions, 8384 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:08,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:08,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:08,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:10,949 INFO L129 PetriNetUnfolder]: 433/1344 cut-off events. [2021-11-19 05:08:10,949 INFO L130 PetriNetUnfolder]: For 22542/22542 co-relation queries the response was YES. [2021-11-19 05:08:10,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10402 conditions, 1344 events. 433/1344 cut-off events. For 22542/22542 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8783 event pairs, 47 based on Foata normal form. 1/1343 useless extension candidates. Maximal degree in co-relation 10218. Up to 878 conditions per place. [2021-11-19 05:08:10,982 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 425 selfloop transitions, 132 changer transitions 31/627 dead transitions. [2021-11-19 05:08:10,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 627 transitions, 9862 flow [2021-11-19 05:08:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:08:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:08:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1910 transitions. [2021-11-19 05:08:10,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644208037825059 [2021-11-19 05:08:10,984 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1910 transitions. [2021-11-19 05:08:10,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1910 transitions. [2021-11-19 05:08:10,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:10,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1910 transitions. [2021-11-19 05:08:10,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.05555555555556) internal successors, (1910), 36 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:10,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:10,989 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:10,989 INFO L186 Difference]: Start difference. First operand has 549 places, 593 transitions, 8384 flow. Second operand 36 states and 1910 transitions. [2021-11-19 05:08:10,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 627 transitions, 9862 flow [2021-11-19 05:08:11,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 627 transitions, 9535 flow, removed 13 selfloop flow, removed 39 redundant places. [2021-11-19 05:08:11,253 INFO L242 Difference]: Finished difference. Result has 544 places, 581 transitions, 8219 flow [2021-11-19 05:08:11,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8219, PETRI_PLACES=544, PETRI_TRANSITIONS=581} [2021-11-19 05:08:11,254 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 456 predicate places. [2021-11-19 05:08:11,254 INFO L470 AbstractCegarLoop]: Abstraction has has 544 places, 581 transitions, 8219 flow [2021-11-19 05:08:11,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:11,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:11,255 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:11,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-19 05:08:11,255 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:11,255 INFO L85 PathProgramCache]: Analyzing trace with hash 625142432, now seen corresponding path program 70 times [2021-11-19 05:08:11,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:11,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272857130] [2021-11-19 05:08:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:11,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:11,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:11,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272857130] [2021-11-19 05:08:11,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272857130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:11,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:11,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:11,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971528108] [2021-11-19 05:08:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:11,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:11,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:11,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:11,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 581 transitions, 8219 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:11,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:11,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:11,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:15,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:08:16,116 INFO L129 PetriNetUnfolder]: 427/1324 cut-off events. [2021-11-19 05:08:16,116 INFO L130 PetriNetUnfolder]: For 22468/22468 co-relation queries the response was YES. [2021-11-19 05:08:16,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10331 conditions, 1324 events. 427/1324 cut-off events. For 22468/22468 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 8615 event pairs, 43 based on Foata normal form. 1/1323 useless extension candidates. Maximal degree in co-relation 10148. Up to 939 conditions per place. [2021-11-19 05:08:16,147 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 464 selfloop transitions, 87 changer transitions 22/612 dead transitions. [2021-11-19 05:08:16,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 612 transitions, 9777 flow [2021-11-19 05:08:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:08:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:08:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1847 transitions. [2021-11-19 05:08:16,149 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613981762917933 [2021-11-19 05:08:16,149 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1847 transitions. [2021-11-19 05:08:16,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1847 transitions. [2021-11-19 05:08:16,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:16,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1847 transitions. [2021-11-19 05:08:16,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.77142857142857) internal successors, (1847), 35 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:16,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:16,154 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:16,154 INFO L186 Difference]: Start difference. First operand has 544 places, 581 transitions, 8219 flow. Second operand 35 states and 1847 transitions. [2021-11-19 05:08:16,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 612 transitions, 9777 flow [2021-11-19 05:08:16,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 612 transitions, 9349 flow, removed 34 selfloop flow, removed 40 redundant places. [2021-11-19 05:08:16,427 INFO L242 Difference]: Finished difference. Result has 534 places, 579 transitions, 8047 flow [2021-11-19 05:08:16,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7821, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8047, PETRI_PLACES=534, PETRI_TRANSITIONS=579} [2021-11-19 05:08:16,429 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 446 predicate places. [2021-11-19 05:08:16,429 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 579 transitions, 8047 flow [2021-11-19 05:08:16,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:16,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:16,429 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:16,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-19 05:08:16,429 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash -183270276, now seen corresponding path program 71 times [2021-11-19 05:08:16,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:16,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484962118] [2021-11-19 05:08:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:16,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:16,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:16,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484962118] [2021-11-19 05:08:16,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484962118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:16,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:16,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:08:16,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002908654] [2021-11-19 05:08:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:16,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:08:16,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:08:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:08:16,969 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:16,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 579 transitions, 8047 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:16,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:16,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:16,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:19,027 INFO L129 PetriNetUnfolder]: 431/1343 cut-off events. [2021-11-19 05:08:19,028 INFO L130 PetriNetUnfolder]: For 23356/23356 co-relation queries the response was YES. [2021-11-19 05:08:19,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10425 conditions, 1343 events. 431/1343 cut-off events. For 23356/23356 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8820 event pairs, 55 based on Foata normal form. 1/1342 useless extension candidates. Maximal degree in co-relation 10247. Up to 911 conditions per place. [2021-11-19 05:08:19,056 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 447 selfloop transitions, 107 changer transitions 27/620 dead transitions. [2021-11-19 05:08:19,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 620 transitions, 9864 flow [2021-11-19 05:08:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:08:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:08:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1757 transitions. [2021-11-19 05:08:19,058 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664087685364281 [2021-11-19 05:08:19,058 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1757 transitions. [2021-11-19 05:08:19,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1757 transitions. [2021-11-19 05:08:19,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:19,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1757 transitions. [2021-11-19 05:08:19,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.24242424242424) internal successors, (1757), 33 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:19,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:19,062 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:19,062 INFO L186 Difference]: Start difference. First operand has 534 places, 579 transitions, 8047 flow. Second operand 33 states and 1757 transitions. [2021-11-19 05:08:19,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 620 transitions, 9864 flow [2021-11-19 05:08:19,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 620 transitions, 9529 flow, removed 58 selfloop flow, removed 34 redundant places. [2021-11-19 05:08:19,320 INFO L242 Difference]: Finished difference. Result has 534 places, 582 transitions, 8127 flow [2021-11-19 05:08:19,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7750, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8127, PETRI_PLACES=534, PETRI_TRANSITIONS=582} [2021-11-19 05:08:19,321 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 446 predicate places. [2021-11-19 05:08:19,322 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 582 transitions, 8127 flow [2021-11-19 05:08:19,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:19,322 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:19,322 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:19,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-19 05:08:19,323 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1132495568, now seen corresponding path program 72 times [2021-11-19 05:08:19,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:19,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972891624] [2021-11-19 05:08:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:19,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:19,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972891624] [2021-11-19 05:08:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972891624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:19,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:19,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:19,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569944456] [2021-11-19 05:08:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:19,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:19,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:19,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:19,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 582 transitions, 8127 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:19,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:19,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:19,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:22,197 INFO L129 PetriNetUnfolder]: 431/1335 cut-off events. [2021-11-19 05:08:22,197 INFO L130 PetriNetUnfolder]: For 23386/23386 co-relation queries the response was YES. [2021-11-19 05:08:22,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10417 conditions, 1335 events. 431/1335 cut-off events. For 23386/23386 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8720 event pairs, 52 based on Foata normal form. 1/1334 useless extension candidates. Maximal degree in co-relation 10237. Up to 909 conditions per place. [2021-11-19 05:08:22,230 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 447 selfloop transitions, 107 changer transitions 30/623 dead transitions. [2021-11-19 05:08:22,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 623 transitions, 9864 flow [2021-11-19 05:08:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:08:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:08:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1958 transitions. [2021-11-19 05:08:22,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5629672225416906 [2021-11-19 05:08:22,233 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1958 transitions. [2021-11-19 05:08:22,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1958 transitions. [2021-11-19 05:08:22,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:22,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1958 transitions. [2021-11-19 05:08:22,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:22,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:22,238 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:22,238 INFO L186 Difference]: Start difference. First operand has 534 places, 582 transitions, 8127 flow. Second operand 37 states and 1958 transitions. [2021-11-19 05:08:22,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 623 transitions, 9864 flow [2021-11-19 05:08:22,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 623 transitions, 9541 flow, removed 69 selfloop flow, removed 30 redundant places. [2021-11-19 05:08:22,545 INFO L242 Difference]: Finished difference. Result has 543 places, 582 transitions, 8164 flow [2021-11-19 05:08:22,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7848, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8164, PETRI_PLACES=543, PETRI_TRANSITIONS=582} [2021-11-19 05:08:22,546 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 455 predicate places. [2021-11-19 05:08:22,546 INFO L470 AbstractCegarLoop]: Abstraction has has 543 places, 582 transitions, 8164 flow [2021-11-19 05:08:22,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:22,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:22,547 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:22,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-19 05:08:22,547 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash 864176970, now seen corresponding path program 73 times [2021-11-19 05:08:22,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:22,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390296349] [2021-11-19 05:08:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:22,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:23,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:23,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390296349] [2021-11-19 05:08:23,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390296349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:23,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:23,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:08:23,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211357702] [2021-11-19 05:08:23,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:23,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:08:23,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:23,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:08:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:08:23,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:23,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 582 transitions, 8164 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:23,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:23,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:23,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:25,905 INFO L129 PetriNetUnfolder]: 429/1346 cut-off events. [2021-11-19 05:08:25,905 INFO L130 PetriNetUnfolder]: For 23108/23108 co-relation queries the response was YES. [2021-11-19 05:08:25,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10438 conditions, 1346 events. 429/1346 cut-off events. For 23108/23108 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8816 event pairs, 52 based on Foata normal form. 1/1345 useless extension candidates. Maximal degree in co-relation 10257. Up to 927 conditions per place. [2021-11-19 05:08:25,938 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 457 selfloop transitions, 102 changer transitions 23/621 dead transitions. [2021-11-19 05:08:25,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 621 transitions, 9928 flow [2021-11-19 05:08:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:08:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:08:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1951 transitions. [2021-11-19 05:08:25,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5609545715928694 [2021-11-19 05:08:25,940 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1951 transitions. [2021-11-19 05:08:25,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1951 transitions. [2021-11-19 05:08:25,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:25,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1951 transitions. [2021-11-19 05:08:25,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.729729729729726) internal successors, (1951), 37 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:25,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:25,945 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:25,945 INFO L186 Difference]: Start difference. First operand has 543 places, 582 transitions, 8164 flow. Second operand 37 states and 1951 transitions. [2021-11-19 05:08:25,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 621 transitions, 9928 flow [2021-11-19 05:08:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 621 transitions, 9607 flow, removed 66 selfloop flow, removed 30 redundant places. [2021-11-19 05:08:26,216 INFO L242 Difference]: Finished difference. Result has 550 places, 586 transitions, 8270 flow [2021-11-19 05:08:26,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7883, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8270, PETRI_PLACES=550, PETRI_TRANSITIONS=586} [2021-11-19 05:08:26,217 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 462 predicate places. [2021-11-19 05:08:26,217 INFO L470 AbstractCegarLoop]: Abstraction has has 550 places, 586 transitions, 8270 flow [2021-11-19 05:08:26,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:26,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:26,217 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:26,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-19 05:08:26,218 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1744640586, now seen corresponding path program 74 times [2021-11-19 05:08:26,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:26,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129420365] [2021-11-19 05:08:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:26,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:26,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:26,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129420365] [2021-11-19 05:08:26,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129420365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:26,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:26,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:08:26,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107627160] [2021-11-19 05:08:26,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:26,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:08:26,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:08:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:08:26,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:26,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 586 transitions, 8270 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:26,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:26,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:26,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:29,099 INFO L129 PetriNetUnfolder]: 420/1317 cut-off events. [2021-11-19 05:08:29,100 INFO L130 PetriNetUnfolder]: For 22696/22696 co-relation queries the response was YES. [2021-11-19 05:08:29,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10286 conditions, 1317 events. 420/1317 cut-off events. For 22696/22696 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8599 event pairs, 51 based on Foata normal form. 1/1317 useless extension candidates. Maximal degree in co-relation 10100. Up to 948 conditions per place. [2021-11-19 05:08:29,133 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 470 selfloop transitions, 86 changer transitions 16/611 dead transitions. [2021-11-19 05:08:29,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 611 transitions, 9640 flow [2021-11-19 05:08:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:08:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:08:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1889 transitions. [2021-11-19 05:08:29,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5582151300236406 [2021-11-19 05:08:29,135 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1889 transitions. [2021-11-19 05:08:29,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1889 transitions. [2021-11-19 05:08:29,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:29,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1889 transitions. [2021-11-19 05:08:29,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.47222222222222) internal successors, (1889), 36 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:29,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:29,140 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:29,140 INFO L186 Difference]: Start difference. First operand has 550 places, 586 transitions, 8270 flow. Second operand 36 states and 1889 transitions. [2021-11-19 05:08:29,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 611 transitions, 9640 flow [2021-11-19 05:08:29,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 611 transitions, 9359 flow, removed 69 selfloop flow, removed 30 redundant places. [2021-11-19 05:08:29,400 INFO L242 Difference]: Finished difference. Result has 557 places, 585 transitions, 8195 flow [2021-11-19 05:08:29,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8005, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8195, PETRI_PLACES=557, PETRI_TRANSITIONS=585} [2021-11-19 05:08:29,401 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 469 predicate places. [2021-11-19 05:08:29,402 INFO L470 AbstractCegarLoop]: Abstraction has has 557 places, 585 transitions, 8195 flow [2021-11-19 05:08:29,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:29,402 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:29,402 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:29,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-19 05:08:29,402 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash 78469246, now seen corresponding path program 75 times [2021-11-19 05:08:29,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:29,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034866290] [2021-11-19 05:08:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:29,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:29,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:29,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034866290] [2021-11-19 05:08:29,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034866290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:29,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:29,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:08:29,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408445987] [2021-11-19 05:08:29,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:29,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:08:29,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:08:29,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:08:29,967 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:29,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 585 transitions, 8195 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:29,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:29,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:29,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:32,709 INFO L129 PetriNetUnfolder]: 416/1308 cut-off events. [2021-11-19 05:08:32,710 INFO L130 PetriNetUnfolder]: For 22360/22360 co-relation queries the response was YES. [2021-11-19 05:08:32,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10144 conditions, 1308 events. 416/1308 cut-off events. For 22360/22360 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8517 event pairs, 37 based on Foata normal form. 1/1307 useless extension candidates. Maximal degree in co-relation 9955. Up to 946 conditions per place. [2021-11-19 05:08:32,741 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 468 selfloop transitions, 74 changer transitions 23/604 dead transitions. [2021-11-19 05:08:32,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 604 transitions, 9405 flow [2021-11-19 05:08:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:08:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:08:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1784 transitions. [2021-11-19 05:08:32,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.55819774718398 [2021-11-19 05:08:32,743 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1784 transitions. [2021-11-19 05:08:32,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1784 transitions. [2021-11-19 05:08:32,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:32,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1784 transitions. [2021-11-19 05:08:32,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.470588235294116) internal successors, (1784), 34 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:32,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:32,748 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:32,748 INFO L186 Difference]: Start difference. First operand has 557 places, 585 transitions, 8195 flow. Second operand 34 states and 1784 transitions. [2021-11-19 05:08:32,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 604 transitions, 9405 flow [2021-11-19 05:08:33,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 604 transitions, 9200 flow, removed 16 selfloop flow, removed 35 redundant places. [2021-11-19 05:08:33,027 INFO L242 Difference]: Finished difference. Result has 553 places, 572 transitions, 7933 flow [2021-11-19 05:08:33,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7933, PETRI_PLACES=553, PETRI_TRANSITIONS=572} [2021-11-19 05:08:33,029 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 465 predicate places. [2021-11-19 05:08:33,029 INFO L470 AbstractCegarLoop]: Abstraction has has 553 places, 572 transitions, 7933 flow [2021-11-19 05:08:33,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:33,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:33,030 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:33,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-19 05:08:33,030 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash 179454214, now seen corresponding path program 76 times [2021-11-19 05:08:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:33,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592359279] [2021-11-19 05:08:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:33,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:33,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:33,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592359279] [2021-11-19 05:08:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592359279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:33,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:33,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:33,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170298440] [2021-11-19 05:08:33,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:33,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:33,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:33,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:33,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 572 transitions, 7933 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:33,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:33,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:33,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:36,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:08:37,881 INFO L129 PetriNetUnfolder]: 418/1295 cut-off events. [2021-11-19 05:08:37,882 INFO L130 PetriNetUnfolder]: For 21911/21911 co-relation queries the response was YES. [2021-11-19 05:08:37,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10081 conditions, 1295 events. 418/1295 cut-off events. For 21911/21911 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8360 event pairs, 41 based on Foata normal form. 1/1294 useless extension candidates. Maximal degree in co-relation 9895. Up to 918 conditions per place. [2021-11-19 05:08:37,915 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 450 selfloop transitions, 101 changer transitions 17/607 dead transitions. [2021-11-19 05:08:37,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 607 transitions, 9415 flow [2021-11-19 05:08:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:08:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:08:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1946 transitions. [2021-11-19 05:08:37,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595169637722829 [2021-11-19 05:08:37,917 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1946 transitions. [2021-11-19 05:08:37,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1946 transitions. [2021-11-19 05:08:37,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:37,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1946 transitions. [2021-11-19 05:08:37,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.5945945945946) internal successors, (1946), 37 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:37,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:37,922 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:37,922 INFO L186 Difference]: Start difference. First operand has 553 places, 572 transitions, 7933 flow. Second operand 37 states and 1946 transitions. [2021-11-19 05:08:37,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 607 transitions, 9415 flow [2021-11-19 05:08:38,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 607 transitions, 9065 flow, removed 34 selfloop flow, removed 40 redundant places. [2021-11-19 05:08:38,172 INFO L242 Difference]: Finished difference. Result has 541 places, 577 transitions, 7951 flow [2021-11-19 05:08:38,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7601, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7951, PETRI_PLACES=541, PETRI_TRANSITIONS=577} [2021-11-19 05:08:38,173 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 453 predicate places. [2021-11-19 05:08:38,173 INFO L470 AbstractCegarLoop]: Abstraction has has 541 places, 577 transitions, 7951 flow [2021-11-19 05:08:38,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:38,173 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:38,173 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:38,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-19 05:08:38,174 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:38,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2105514060, now seen corresponding path program 77 times [2021-11-19 05:08:38,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:38,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926814287] [2021-11-19 05:08:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:38,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:38,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:38,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926814287] [2021-11-19 05:08:38,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926814287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:38,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:38,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:38,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62878241] [2021-11-19 05:08:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:38,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:38,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:38,712 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:38,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 577 transitions, 7951 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:38,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:38,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:38,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:42,305 INFO L129 PetriNetUnfolder]: 418/1313 cut-off events. [2021-11-19 05:08:42,305 INFO L130 PetriNetUnfolder]: For 21289/21289 co-relation queries the response was YES. [2021-11-19 05:08:42,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 1313 events. 418/1313 cut-off events. For 21289/21289 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8578 event pairs, 54 based on Foata normal form. 1/1312 useless extension candidates. Maximal degree in co-relation 9835. Up to 933 conditions per place. [2021-11-19 05:08:42,337 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 462 selfloop transitions, 87 changer transitions 19/607 dead transitions. [2021-11-19 05:08:42,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 607 transitions, 9326 flow [2021-11-19 05:08:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:08:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:08:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1791 transitions. [2021-11-19 05:08:42,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603879849812266 [2021-11-19 05:08:42,340 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1791 transitions. [2021-11-19 05:08:42,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1791 transitions. [2021-11-19 05:08:42,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:42,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1791 transitions. [2021-11-19 05:08:42,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.6764705882353) internal successors, (1791), 34 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:42,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:42,347 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:42,347 INFO L186 Difference]: Start difference. First operand has 541 places, 577 transitions, 7951 flow. Second operand 34 states and 1791 transitions. [2021-11-19 05:08:42,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 607 transitions, 9326 flow [2021-11-19 05:08:42,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 607 transitions, 9125 flow, removed 16 selfloop flow, removed 31 redundant places. [2021-11-19 05:08:42,629 INFO L242 Difference]: Finished difference. Result has 546 places, 578 transitions, 7958 flow [2021-11-19 05:08:42,630 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7756, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7958, PETRI_PLACES=546, PETRI_TRANSITIONS=578} [2021-11-19 05:08:42,630 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 458 predicate places. [2021-11-19 05:08:42,630 INFO L470 AbstractCegarLoop]: Abstraction has has 546 places, 578 transitions, 7958 flow [2021-11-19 05:08:42,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:42,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:42,631 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:42,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-19 05:08:42,631 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:42,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1681409572, now seen corresponding path program 78 times [2021-11-19 05:08:42,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:42,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384906616] [2021-11-19 05:08:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:42,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:43,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:43,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384906616] [2021-11-19 05:08:43,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384906616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:43,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:43,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:43,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593078840] [2021-11-19 05:08:43,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:43,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:43,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:43,211 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:43,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 578 transitions, 7958 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:43,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:43,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:43,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:46,048 INFO L129 PetriNetUnfolder]: 434/1362 cut-off events. [2021-11-19 05:08:46,048 INFO L130 PetriNetUnfolder]: For 23336/23336 co-relation queries the response was YES. [2021-11-19 05:08:46,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10474 conditions, 1362 events. 434/1362 cut-off events. For 23336/23336 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9004 event pairs, 52 based on Foata normal form. 1/1360 useless extension candidates. Maximal degree in co-relation 10288. Up to 894 conditions per place. [2021-11-19 05:08:46,080 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 418 selfloop transitions, 150 changer transitions 30/637 dead transitions. [2021-11-19 05:08:46,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 637 transitions, 9934 flow [2021-11-19 05:08:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 05:08:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-11-19 05:08:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2417 transitions. [2021-11-19 05:08:46,083 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5589731729879741 [2021-11-19 05:08:46,083 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2417 transitions. [2021-11-19 05:08:46,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2417 transitions. [2021-11-19 05:08:46,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:46,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2417 transitions. [2021-11-19 05:08:46,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.54347826086956) internal successors, (2417), 46 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:46,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:46,089 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:46,089 INFO L186 Difference]: Start difference. First operand has 546 places, 578 transitions, 7958 flow. Second operand 46 states and 2417 transitions. [2021-11-19 05:08:46,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 637 transitions, 9934 flow [2021-11-19 05:08:46,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 637 transitions, 9704 flow, removed 18 selfloop flow, removed 31 redundant places. [2021-11-19 05:08:46,358 INFO L242 Difference]: Finished difference. Result has 562 places, 593 transitions, 8409 flow [2021-11-19 05:08:46,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7748, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=8409, PETRI_PLACES=562, PETRI_TRANSITIONS=593} [2021-11-19 05:08:46,359 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 474 predicate places. [2021-11-19 05:08:46,359 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 593 transitions, 8409 flow [2021-11-19 05:08:46,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:46,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:46,360 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:46,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-19 05:08:46,360 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1464649830, now seen corresponding path program 79 times [2021-11-19 05:08:46,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:46,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665348851] [2021-11-19 05:08:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:46,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:46,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:46,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665348851] [2021-11-19 05:08:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665348851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:46,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:08:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154231292] [2021-11-19 05:08:46,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:46,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:08:46,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:08:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:08:46,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:46,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 593 transitions, 8409 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:46,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:46,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:46,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:49,023 INFO L129 PetriNetUnfolder]: 431/1359 cut-off events. [2021-11-19 05:08:49,023 INFO L130 PetriNetUnfolder]: For 24246/24246 co-relation queries the response was YES. [2021-11-19 05:08:49,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10673 conditions, 1359 events. 431/1359 cut-off events. For 24246/24246 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8993 event pairs, 50 based on Foata normal form. 1/1357 useless extension candidates. Maximal degree in co-relation 10484. Up to 912 conditions per place. [2021-11-19 05:08:49,059 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 452 selfloop transitions, 125 changer transitions 16/632 dead transitions. [2021-11-19 05:08:49,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 632 transitions, 10317 flow [2021-11-19 05:08:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:08:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:08:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1859 transitions. [2021-11-19 05:08:49,061 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5650455927051672 [2021-11-19 05:08:49,061 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1859 transitions. [2021-11-19 05:08:49,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1859 transitions. [2021-11-19 05:08:49,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:49,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1859 transitions. [2021-11-19 05:08:49,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.114285714285714) internal successors, (1859), 35 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:49,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:49,066 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:49,066 INFO L186 Difference]: Start difference. First operand has 562 places, 593 transitions, 8409 flow. Second operand 35 states and 1859 transitions. [2021-11-19 05:08:49,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 632 transitions, 10317 flow [2021-11-19 05:08:49,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 632 transitions, 9960 flow, removed 59 selfloop flow, removed 38 redundant places. [2021-11-19 05:08:49,373 INFO L242 Difference]: Finished difference. Result has 558 places, 604 transitions, 8708 flow [2021-11-19 05:08:49,374 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8084, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8708, PETRI_PLACES=558, PETRI_TRANSITIONS=604} [2021-11-19 05:08:49,374 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 470 predicate places. [2021-11-19 05:08:49,374 INFO L470 AbstractCegarLoop]: Abstraction has has 558 places, 604 transitions, 8708 flow [2021-11-19 05:08:49,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:49,375 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:49,375 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:49,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-19 05:08:49,376 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:49,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1446884060, now seen corresponding path program 80 times [2021-11-19 05:08:49,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:49,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756756522] [2021-11-19 05:08:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:49,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:49,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:49,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756756522] [2021-11-19 05:08:49,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756756522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:49,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:49,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:49,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524996357] [2021-11-19 05:08:49,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:49,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:49,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 604 transitions, 8708 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:49,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:49,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:49,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:51,935 INFO L129 PetriNetUnfolder]: 431/1355 cut-off events. [2021-11-19 05:08:51,936 INFO L130 PetriNetUnfolder]: For 25420/25420 co-relation queries the response was YES. [2021-11-19 05:08:51,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10763 conditions, 1355 events. 431/1355 cut-off events. For 25420/25420 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8959 event pairs, 52 based on Foata normal form. 1/1353 useless extension candidates. Maximal degree in co-relation 10571. Up to 894 conditions per place. [2021-11-19 05:08:51,971 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 425 selfloop transitions, 158 changer transitions 18/640 dead transitions. [2021-11-19 05:08:51,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 640 transitions, 10275 flow [2021-11-19 05:08:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:08:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-19 05:08:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2110 transitions. [2021-11-19 05:08:51,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5611702127659575 [2021-11-19 05:08:51,974 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2110 transitions. [2021-11-19 05:08:51,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2110 transitions. [2021-11-19 05:08:51,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:51,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2110 transitions. [2021-11-19 05:08:51,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.75) internal successors, (2110), 40 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:51,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:51,979 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:51,979 INFO L186 Difference]: Start difference. First operand has 558 places, 604 transitions, 8708 flow. Second operand 40 states and 2110 transitions. [2021-11-19 05:08:51,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 640 transitions, 10275 flow [2021-11-19 05:08:52,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 640 transitions, 9807 flow, removed 146 selfloop flow, removed 26 redundant places. [2021-11-19 05:08:52,286 INFO L242 Difference]: Finished difference. Result has 572 places, 605 transitions, 8704 flow [2021-11-19 05:08:52,287 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8260, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=8704, PETRI_PLACES=572, PETRI_TRANSITIONS=605} [2021-11-19 05:08:52,287 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 484 predicate places. [2021-11-19 05:08:52,287 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 605 transitions, 8704 flow [2021-11-19 05:08:52,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:52,288 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:52,288 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:52,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-19 05:08:52,288 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 579072632, now seen corresponding path program 81 times [2021-11-19 05:08:52,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:52,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059226320] [2021-11-19 05:08:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:52,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:52,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:52,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059226320] [2021-11-19 05:08:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059226320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:52,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:52,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:08:52,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205649816] [2021-11-19 05:08:52,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:52,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:08:52,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:08:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:08:52,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:52,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 605 transitions, 8704 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:52,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:52,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:52,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:08:55,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:08:56,562 INFO L129 PetriNetUnfolder]: 465/1475 cut-off events. [2021-11-19 05:08:56,562 INFO L130 PetriNetUnfolder]: For 27661/27661 co-relation queries the response was YES. [2021-11-19 05:08:56,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11591 conditions, 1475 events. 465/1475 cut-off events. For 27661/27661 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10099 event pairs, 37 based on Foata normal form. 1/1472 useless extension candidates. Maximal degree in co-relation 11397. Up to 890 conditions per place. [2021-11-19 05:08:56,602 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 426 selfloop transitions, 215 changer transitions 22/702 dead transitions. [2021-11-19 05:08:56,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 702 transitions, 11505 flow [2021-11-19 05:08:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 05:08:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-11-19 05:08:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2427 transitions. [2021-11-19 05:08:56,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5612858464384829 [2021-11-19 05:08:56,605 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2427 transitions. [2021-11-19 05:08:56,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2427 transitions. [2021-11-19 05:08:56,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:08:56,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2427 transitions. [2021-11-19 05:08:56,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.76086956521739) internal successors, (2427), 46 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:56,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:56,612 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:56,612 INFO L186 Difference]: Start difference. First operand has 572 places, 605 transitions, 8704 flow. Second operand 46 states and 2427 transitions. [2021-11-19 05:08:56,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 702 transitions, 11505 flow [2021-11-19 05:08:57,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 702 transitions, 11066 flow, removed 59 selfloop flow, removed 35 redundant places. [2021-11-19 05:08:57,034 INFO L242 Difference]: Finished difference. Result has 590 places, 652 transitions, 9747 flow [2021-11-19 05:08:57,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8317, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=9747, PETRI_PLACES=590, PETRI_TRANSITIONS=652} [2021-11-19 05:08:57,035 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 502 predicate places. [2021-11-19 05:08:57,035 INFO L470 AbstractCegarLoop]: Abstraction has has 590 places, 652 transitions, 9747 flow [2021-11-19 05:08:57,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:57,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:08:57,035 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:57,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-19 05:08:57,035 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:08:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 383813904, now seen corresponding path program 82 times [2021-11-19 05:08:57,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:57,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519626884] [2021-11-19 05:08:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:57,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:08:57,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:57,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519626884] [2021-11-19 05:08:57,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519626884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:08:57,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:08:57,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:08:57,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154777946] [2021-11-19 05:08:57,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:08:57,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:08:57,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:08:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:08:57,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:08:57,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 652 transitions, 9747 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:57,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:08:57,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:08:57,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:00,555 INFO L129 PetriNetUnfolder]: 458/1465 cut-off events. [2021-11-19 05:09:00,555 INFO L130 PetriNetUnfolder]: For 28180/28180 co-relation queries the response was YES. [2021-11-19 05:09:00,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11816 conditions, 1465 events. 458/1465 cut-off events. For 28180/28180 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10088 event pairs, 49 based on Foata normal form. 1/1463 useless extension candidates. Maximal degree in co-relation 11612. Up to 1048 conditions per place. [2021-11-19 05:09:00,583 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 536 selfloop transitions, 89 changer transitions 18/682 dead transitions. [2021-11-19 05:09:00,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 682 transitions, 11400 flow [2021-11-19 05:09:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:09:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:09:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1939 transitions. [2021-11-19 05:09:00,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5575043128234618 [2021-11-19 05:09:00,585 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1939 transitions. [2021-11-19 05:09:00,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1939 transitions. [2021-11-19 05:09:00,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:00,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1939 transitions. [2021-11-19 05:09:00,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.4054054054054) internal successors, (1939), 37 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:00,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:00,589 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:00,589 INFO L186 Difference]: Start difference. First operand has 590 places, 652 transitions, 9747 flow. Second operand 37 states and 1939 transitions. [2021-11-19 05:09:00,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 682 transitions, 11400 flow [2021-11-19 05:09:00,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 682 transitions, 11063 flow, removed 114 selfloop flow, removed 28 redundant places. [2021-11-19 05:09:00,885 INFO L242 Difference]: Finished difference. Result has 603 places, 654 transitions, 9703 flow [2021-11-19 05:09:00,886 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9420, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9703, PETRI_PLACES=603, PETRI_TRANSITIONS=654} [2021-11-19 05:09:00,886 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 515 predicate places. [2021-11-19 05:09:00,886 INFO L470 AbstractCegarLoop]: Abstraction has has 603 places, 654 transitions, 9703 flow [2021-11-19 05:09:00,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:00,886 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:00,886 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:00,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-19 05:09:00,886 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 774476846, now seen corresponding path program 83 times [2021-11-19 05:09:00,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:00,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229395128] [2021-11-19 05:09:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:00,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:01,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:01,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229395128] [2021-11-19 05:09:01,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229395128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:01,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:01,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:09:01,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360135147] [2021-11-19 05:09:01,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:01,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:09:01,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:01,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:09:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:09:01,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:01,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 654 transitions, 9703 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:01,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:01,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:01,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:04,209 INFO L129 PetriNetUnfolder]: 454/1456 cut-off events. [2021-11-19 05:09:04,209 INFO L130 PetriNetUnfolder]: For 28569/28569 co-relation queries the response was YES. [2021-11-19 05:09:04,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11711 conditions, 1456 events. 454/1456 cut-off events. For 28569/28569 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9969 event pairs, 50 based on Foata normal form. 1/1454 useless extension candidates. Maximal degree in co-relation 11499. Up to 1046 conditions per place. [2021-11-19 05:09:04,245 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 535 selfloop transitions, 73 changer transitions 26/673 dead transitions. [2021-11-19 05:09:04,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 673 transitions, 11055 flow [2021-11-19 05:09:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:09:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:09:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1783 transitions. [2021-11-19 05:09:04,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5578848560700876 [2021-11-19 05:09:04,247 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1783 transitions. [2021-11-19 05:09:04,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1783 transitions. [2021-11-19 05:09:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:04,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1783 transitions. [2021-11-19 05:09:04,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.44117647058823) internal successors, (1783), 34 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:04,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:04,251 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:04,252 INFO L186 Difference]: Start difference. First operand has 603 places, 654 transitions, 9703 flow. Second operand 34 states and 1783 transitions. [2021-11-19 05:09:04,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 673 transitions, 11055 flow [2021-11-19 05:09:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 673 transitions, 10815 flow, removed 36 selfloop flow, removed 34 redundant places. [2021-11-19 05:09:04,631 INFO L242 Difference]: Finished difference. Result has 599 places, 638 transitions, 9381 flow [2021-11-19 05:09:04,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9471, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9381, PETRI_PLACES=599, PETRI_TRANSITIONS=638} [2021-11-19 05:09:04,632 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 511 predicate places. [2021-11-19 05:09:04,632 INFO L470 AbstractCegarLoop]: Abstraction has has 599 places, 638 transitions, 9381 flow [2021-11-19 05:09:04,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:04,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:04,632 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:04,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-19 05:09:04,632 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:04,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1247391014, now seen corresponding path program 84 times [2021-11-19 05:09:04,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:04,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237176281] [2021-11-19 05:09:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:04,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:05,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:05,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237176281] [2021-11-19 05:09:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237176281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:05,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:05,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:09:05,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322784268] [2021-11-19 05:09:05,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:05,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:09:05,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:05,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:09:05,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:09:05,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:05,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 638 transitions, 9381 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:05,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:05,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:05,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:07,331 INFO L129 PetriNetUnfolder]: 452/1432 cut-off events. [2021-11-19 05:09:07,331 INFO L130 PetriNetUnfolder]: For 27870/27870 co-relation queries the response was YES. [2021-11-19 05:09:07,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11561 conditions, 1432 events. 452/1432 cut-off events. For 27870/27870 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9735 event pairs, 47 based on Foata normal form. 1/1430 useless extension candidates. Maximal degree in co-relation 11353. Up to 963 conditions per place. [2021-11-19 05:09:07,368 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 472 selfloop transitions, 146 changer transitions 17/674 dead transitions. [2021-11-19 05:09:07,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 674 transitions, 11099 flow [2021-11-19 05:09:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:09:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:09:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1957 transitions. [2021-11-19 05:09:07,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5626797009775734 [2021-11-19 05:09:07,371 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1957 transitions. [2021-11-19 05:09:07,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1957 transitions. [2021-11-19 05:09:07,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:07,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1957 transitions. [2021-11-19 05:09:07,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.891891891891895) internal successors, (1957), 37 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:07,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:07,375 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:07,376 INFO L186 Difference]: Start difference. First operand has 599 places, 638 transitions, 9381 flow. Second operand 37 states and 1957 transitions. [2021-11-19 05:09:07,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 674 transitions, 11099 flow [2021-11-19 05:09:07,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 674 transitions, 10798 flow, removed 26 selfloop flow, removed 38 redundant places. [2021-11-19 05:09:07,753 INFO L242 Difference]: Finished difference. Result has 582 places, 641 transitions, 9556 flow [2021-11-19 05:09:07,753 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9090, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9556, PETRI_PLACES=582, PETRI_TRANSITIONS=641} [2021-11-19 05:09:07,754 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 494 predicate places. [2021-11-19 05:09:07,754 INFO L470 AbstractCegarLoop]: Abstraction has has 582 places, 641 transitions, 9556 flow [2021-11-19 05:09:07,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:07,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:07,755 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:07,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-19 05:09:07,756 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1200671204, now seen corresponding path program 85 times [2021-11-19 05:09:07,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:07,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402716383] [2021-11-19 05:09:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:07,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:08,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:08,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402716383] [2021-11-19 05:09:08,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402716383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:08,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:08,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:09:08,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877052667] [2021-11-19 05:09:08,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:08,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:09:08,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:09:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:09:08,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:08,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 641 transitions, 9556 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:08,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:08,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:08,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:10,529 INFO L129 PetriNetUnfolder]: 450/1431 cut-off events. [2021-11-19 05:09:10,530 INFO L130 PetriNetUnfolder]: For 27952/27952 co-relation queries the response was YES. [2021-11-19 05:09:10,560 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11533 conditions, 1431 events. 450/1431 cut-off events. For 27952/27952 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9768 event pairs, 36 based on Foata normal form. 1/1429 useless extension candidates. Maximal degree in co-relation 11332. Up to 1035 conditions per place. [2021-11-19 05:09:10,569 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 528 selfloop transitions, 81 changer transitions 19/667 dead transitions. [2021-11-19 05:09:10,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 667 transitions, 11039 flow [2021-11-19 05:09:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:09:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:09:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1840 transitions. [2021-11-19 05:09:10,571 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2021-11-19 05:09:10,572 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1840 transitions. [2021-11-19 05:09:10,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1840 transitions. [2021-11-19 05:09:10,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:10,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1840 transitions. [2021-11-19 05:09:10,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.57142857142857) internal successors, (1840), 35 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:10,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:10,579 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:10,579 INFO L186 Difference]: Start difference. First operand has 582 places, 641 transitions, 9556 flow. Second operand 35 states and 1840 transitions. [2021-11-19 05:09:10,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 667 transitions, 11039 flow [2021-11-19 05:09:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 667 transitions, 10672 flow, removed 59 selfloop flow, removed 32 redundant places. [2021-11-19 05:09:10,931 INFO L242 Difference]: Finished difference. Result has 586 places, 638 transitions, 9343 flow [2021-11-19 05:09:10,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9195, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9343, PETRI_PLACES=586, PETRI_TRANSITIONS=638} [2021-11-19 05:09:10,932 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 498 predicate places. [2021-11-19 05:09:10,932 INFO L470 AbstractCegarLoop]: Abstraction has has 586 places, 638 transitions, 9343 flow [2021-11-19 05:09:10,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:10,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:10,933 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:10,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-19 05:09:10,934 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1357758408, now seen corresponding path program 86 times [2021-11-19 05:09:10,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:10,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26759111] [2021-11-19 05:09:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:10,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:11,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:11,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26759111] [2021-11-19 05:09:11,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26759111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:11,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:11,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:09:11,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360679140] [2021-11-19 05:09:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:11,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:09:11,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:09:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:09:11,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:11,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 638 transitions, 9343 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:11,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:11,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:11,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:14,522 INFO L129 PetriNetUnfolder]: 456/1460 cut-off events. [2021-11-19 05:09:14,522 INFO L130 PetriNetUnfolder]: For 29880/29880 co-relation queries the response was YES. [2021-11-19 05:09:14,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11740 conditions, 1460 events. 456/1460 cut-off events. For 29880/29880 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10031 event pairs, 37 based on Foata normal form. 1/1458 useless extension candidates. Maximal degree in co-relation 11536. Up to 892 conditions per place. [2021-11-19 05:09:14,552 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 422 selfloop transitions, 188 changer transitions 36/685 dead transitions. [2021-11-19 05:09:14,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 685 transitions, 11238 flow [2021-11-19 05:09:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-19 05:09:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-11-19 05:09:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2266 transitions. [2021-11-19 05:09:14,555 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606135576447303 [2021-11-19 05:09:14,555 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2266 transitions. [2021-11-19 05:09:14,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2266 transitions. [2021-11-19 05:09:14,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:14,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2266 transitions. [2021-11-19 05:09:14,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.69767441860465) internal successors, (2266), 43 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:14,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:14,562 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:14,562 INFO L186 Difference]: Start difference. First operand has 586 places, 638 transitions, 9343 flow. Second operand 43 states and 2266 transitions. [2021-11-19 05:09:14,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 685 transitions, 11238 flow [2021-11-19 05:09:14,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 685 transitions, 10928 flow, removed 24 selfloop flow, removed 38 redundant places. [2021-11-19 05:09:14,921 INFO L242 Difference]: Finished difference. Result has 591 places, 632 transitions, 9477 flow [2021-11-19 05:09:14,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9059, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=9477, PETRI_PLACES=591, PETRI_TRANSITIONS=632} [2021-11-19 05:09:14,922 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 503 predicate places. [2021-11-19 05:09:14,922 INFO L470 AbstractCegarLoop]: Abstraction has has 591 places, 632 transitions, 9477 flow [2021-11-19 05:09:14,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:14,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:14,923 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:14,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-11-19 05:09:14,923 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash -823785652, now seen corresponding path program 87 times [2021-11-19 05:09:14,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:14,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143633126] [2021-11-19 05:09:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:14,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:15,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:15,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143633126] [2021-11-19 05:09:15,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143633126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:15,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:15,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:09:15,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58753293] [2021-11-19 05:09:15,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:15,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:09:15,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:09:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:09:15,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:15,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 632 transitions, 9477 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:15,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:15,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:15,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:17,699 INFO L129 PetriNetUnfolder]: 444/1431 cut-off events. [2021-11-19 05:09:17,699 INFO L130 PetriNetUnfolder]: For 28911/28911 co-relation queries the response was YES. [2021-11-19 05:09:17,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11621 conditions, 1431 events. 444/1431 cut-off events. For 28911/28911 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9735 event pairs, 50 based on Foata normal form. 1/1429 useless extension candidates. Maximal degree in co-relation 11418. Up to 980 conditions per place. [2021-11-19 05:09:17,737 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 495 selfloop transitions, 114 changer transitions 20/668 dead transitions. [2021-11-19 05:09:17,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 668 transitions, 11329 flow [2021-11-19 05:09:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:09:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:09:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1704 transitions. [2021-11-19 05:09:17,740 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2021-11-19 05:09:17,740 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1704 transitions. [2021-11-19 05:09:17,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1704 transitions. [2021-11-19 05:09:17,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:17,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1704 transitions. [2021-11-19 05:09:17,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.25) internal successors, (1704), 32 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:17,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:17,746 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:17,746 INFO L186 Difference]: Start difference. First operand has 591 places, 632 transitions, 9477 flow. Second operand 32 states and 1704 transitions. [2021-11-19 05:09:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 668 transitions, 11329 flow [2021-11-19 05:09:18,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 668 transitions, 10857 flow, removed 36 selfloop flow, removed 40 redundant places. [2021-11-19 05:09:18,103 INFO L242 Difference]: Finished difference. Result has 580 places, 638 transitions, 9487 flow [2021-11-19 05:09:18,104 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9021, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9487, PETRI_PLACES=580, PETRI_TRANSITIONS=638} [2021-11-19 05:09:18,104 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 492 predicate places. [2021-11-19 05:09:18,104 INFO L470 AbstractCegarLoop]: Abstraction has has 580 places, 638 transitions, 9487 flow [2021-11-19 05:09:18,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:18,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:18,104 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:18,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-11-19 05:09:18,105 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash 80120252, now seen corresponding path program 88 times [2021-11-19 05:09:18,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:18,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902920608] [2021-11-19 05:09:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:18,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:18,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:18,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902920608] [2021-11-19 05:09:18,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902920608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:18,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:18,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:09:18,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240705287] [2021-11-19 05:09:18,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:18,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:09:18,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:09:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:09:18,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:18,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 638 transitions, 9487 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:18,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:18,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:18,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:20,775 INFO L129 PetriNetUnfolder]: 446/1443 cut-off events. [2021-11-19 05:09:20,776 INFO L130 PetriNetUnfolder]: For 29174/29174 co-relation queries the response was YES. [2021-11-19 05:09:20,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11621 conditions, 1443 events. 446/1443 cut-off events. For 29174/29174 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9874 event pairs, 49 based on Foata normal form. 1/1442 useless extension candidates. Maximal degree in co-relation 11420. Up to 974 conditions per place. [2021-11-19 05:09:20,810 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 494 selfloop transitions, 116 changer transitions 23/672 dead transitions. [2021-11-19 05:09:20,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 672 transitions, 11288 flow [2021-11-19 05:09:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:09:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:09:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1756 transitions. [2021-11-19 05:09:20,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.56608639587363 [2021-11-19 05:09:20,812 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1756 transitions. [2021-11-19 05:09:20,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1756 transitions. [2021-11-19 05:09:20,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:20,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1756 transitions. [2021-11-19 05:09:20,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.21212121212121) internal successors, (1756), 33 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:20,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:20,816 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:20,816 INFO L186 Difference]: Start difference. First operand has 580 places, 638 transitions, 9487 flow. Second operand 33 states and 1756 transitions. [2021-11-19 05:09:20,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 672 transitions, 11288 flow [2021-11-19 05:09:21,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 672 transitions, 10866 flow, removed 129 selfloop flow, removed 27 redundant places. [2021-11-19 05:09:21,223 INFO L242 Difference]: Finished difference. Result has 587 places, 638 transitions, 9462 flow [2021-11-19 05:09:21,224 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9462, PETRI_PLACES=587, PETRI_TRANSITIONS=638} [2021-11-19 05:09:21,224 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 499 predicate places. [2021-11-19 05:09:21,224 INFO L470 AbstractCegarLoop]: Abstraction has has 587 places, 638 transitions, 9462 flow [2021-11-19 05:09:21,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:21,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:21,225 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:21,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-11-19 05:09:21,225 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1517791734, now seen corresponding path program 89 times [2021-11-19 05:09:21,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:21,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56821176] [2021-11-19 05:09:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:21,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:21,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:21,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56821176] [2021-11-19 05:09:21,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56821176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:21,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:21,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:09:21,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571157274] [2021-11-19 05:09:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:21,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:09:21,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:09:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:09:21,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:21,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 638 transitions, 9462 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:21,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:21,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:21,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:24,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:09:25,220 INFO L129 PetriNetUnfolder]: 448/1450 cut-off events. [2021-11-19 05:09:25,220 INFO L130 PetriNetUnfolder]: For 28355/28355 co-relation queries the response was YES. [2021-11-19 05:09:25,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11611 conditions, 1450 events. 448/1450 cut-off events. For 28355/28355 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9951 event pairs, 51 based on Foata normal form. 1/1449 useless extension candidates. Maximal degree in co-relation 11408. Up to 1007 conditions per place. [2021-11-19 05:09:25,251 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 522 selfloop transitions, 95 changer transitions 22/678 dead transitions. [2021-11-19 05:09:25,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 678 transitions, 11333 flow [2021-11-19 05:09:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:09:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:09:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1801 transitions. [2021-11-19 05:09:25,253 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635168961201502 [2021-11-19 05:09:25,254 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1801 transitions. [2021-11-19 05:09:25,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1801 transitions. [2021-11-19 05:09:25,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:25,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1801 transitions. [2021-11-19 05:09:25,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.970588235294116) internal successors, (1801), 34 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:25,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:25,258 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:25,258 INFO L186 Difference]: Start difference. First operand has 587 places, 638 transitions, 9462 flow. Second operand 34 states and 1801 transitions. [2021-11-19 05:09:25,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 678 transitions, 11333 flow [2021-11-19 05:09:25,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 678 transitions, 11028 flow, removed 52 selfloop flow, removed 32 redundant places. [2021-11-19 05:09:25,651 INFO L242 Difference]: Finished difference. Result has 594 places, 645 transitions, 9594 flow [2021-11-19 05:09:25,651 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9191, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9594, PETRI_PLACES=594, PETRI_TRANSITIONS=645} [2021-11-19 05:09:25,652 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 506 predicate places. [2021-11-19 05:09:25,654 INFO L470 AbstractCegarLoop]: Abstraction has has 594 places, 645 transitions, 9594 flow [2021-11-19 05:09:25,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:25,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:25,654 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:25,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-11-19 05:09:25,655 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:25,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1843358476, now seen corresponding path program 90 times [2021-11-19 05:09:25,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:25,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924694739] [2021-11-19 05:09:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:25,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:26,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:26,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924694739] [2021-11-19 05:09:26,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924694739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:26,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:26,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:09:26,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071605706] [2021-11-19 05:09:26,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:26,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:09:26,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:09:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:09:26,180 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:26,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 645 transitions, 9594 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:26,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:26,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:26,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:29,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:09:31,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:09:33,644 INFO L129 PetriNetUnfolder]: 450/1458 cut-off events. [2021-11-19 05:09:33,644 INFO L130 PetriNetUnfolder]: For 29220/29220 co-relation queries the response was YES. [2021-11-19 05:09:33,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11770 conditions, 1458 events. 450/1458 cut-off events. For 29220/29220 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10030 event pairs, 47 based on Foata normal form. 1/1457 useless extension candidates. Maximal degree in co-relation 11565. Up to 1007 conditions per place. [2021-11-19 05:09:33,680 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 502 selfloop transitions, 122 changer transitions 22/685 dead transitions. [2021-11-19 05:09:33,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 685 transitions, 11579 flow [2021-11-19 05:09:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:09:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-19 05:09:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2305 transitions. [2021-11-19 05:09:33,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5573017408123792 [2021-11-19 05:09:33,682 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2305 transitions. [2021-11-19 05:09:33,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2305 transitions. [2021-11-19 05:09:33,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:33,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2305 transitions. [2021-11-19 05:09:33,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.38636363636363) internal successors, (2305), 44 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:33,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:33,689 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:33,689 INFO L186 Difference]: Start difference. First operand has 594 places, 645 transitions, 9594 flow. Second operand 44 states and 2305 transitions. [2021-11-19 05:09:33,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 685 transitions, 11579 flow [2021-11-19 05:09:34,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 685 transitions, 11330 flow, removed 52 selfloop flow, removed 28 redundant places. [2021-11-19 05:09:34,087 INFO L242 Difference]: Finished difference. Result has 614 places, 650 transitions, 9825 flow [2021-11-19 05:09:34,088 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9367, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9825, PETRI_PLACES=614, PETRI_TRANSITIONS=650} [2021-11-19 05:09:34,089 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 526 predicate places. [2021-11-19 05:09:34,089 INFO L470 AbstractCegarLoop]: Abstraction has has 614 places, 650 transitions, 9825 flow [2021-11-19 05:09:34,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:34,089 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:34,089 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:34,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-11-19 05:09:34,089 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash 565804332, now seen corresponding path program 91 times [2021-11-19 05:09:34,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:34,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841346193] [2021-11-19 05:09:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:34,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:34,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:34,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841346193] [2021-11-19 05:09:34,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841346193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:34,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:34,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:09:34,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227899939] [2021-11-19 05:09:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:34,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:09:34,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:09:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:09:34,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:34,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 650 transitions, 9825 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:34,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:34,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:34,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:37,070 INFO L129 PetriNetUnfolder]: 447/1468 cut-off events. [2021-11-19 05:09:37,070 INFO L130 PetriNetUnfolder]: For 32041/32041 co-relation queries the response was YES. [2021-11-19 05:09:37,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11965 conditions, 1468 events. 447/1468 cut-off events. For 32041/32041 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10185 event pairs, 35 based on Foata normal form. 1/1467 useless extension candidates. Maximal degree in co-relation 11755. Up to 1008 conditions per place. [2021-11-19 05:09:37,108 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 516 selfloop transitions, 104 changer transitions 22/681 dead transitions. [2021-11-19 05:09:37,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 681 transitions, 11621 flow [2021-11-19 05:09:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:09:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:09:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1851 transitions. [2021-11-19 05:09:37,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5626139817629179 [2021-11-19 05:09:37,111 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1851 transitions. [2021-11-19 05:09:37,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1851 transitions. [2021-11-19 05:09:37,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:37,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1851 transitions. [2021-11-19 05:09:37,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.885714285714286) internal successors, (1851), 35 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:37,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:37,116 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:37,116 INFO L186 Difference]: Start difference. First operand has 614 places, 650 transitions, 9825 flow. Second operand 35 states and 1851 transitions. [2021-11-19 05:09:37,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 681 transitions, 11621 flow [2021-11-19 05:09:37,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 681 transitions, 11203 flow, removed 81 selfloop flow, removed 43 redundant places. [2021-11-19 05:09:37,524 INFO L242 Difference]: Finished difference. Result has 606 places, 648 transitions, 9722 flow [2021-11-19 05:09:37,525 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9429, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9722, PETRI_PLACES=606, PETRI_TRANSITIONS=648} [2021-11-19 05:09:37,525 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 518 predicate places. [2021-11-19 05:09:37,525 INFO L470 AbstractCegarLoop]: Abstraction has has 606 places, 648 transitions, 9722 flow [2021-11-19 05:09:37,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:37,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:37,525 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:37,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-11-19 05:09:37,526 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash 357024994, now seen corresponding path program 92 times [2021-11-19 05:09:37,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:37,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222678386] [2021-11-19 05:09:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:37,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:37,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:38,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222678386] [2021-11-19 05:09:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222678386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:38,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:38,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:09:38,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604076398] [2021-11-19 05:09:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:38,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:09:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:09:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:09:38,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:38,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 648 transitions, 9722 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:38,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:38,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:38,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:40,393 INFO L129 PetriNetUnfolder]: 443/1450 cut-off events. [2021-11-19 05:09:40,394 INFO L130 PetriNetUnfolder]: For 31475/31475 co-relation queries the response was YES. [2021-11-19 05:09:40,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11813 conditions, 1450 events. 443/1450 cut-off events. For 31475/31475 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10024 event pairs, 48 based on Foata normal form. 1/1448 useless extension candidates. Maximal degree in co-relation 11605. Up to 986 conditions per place. [2021-11-19 05:09:40,428 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 501 selfloop transitions, 116 changer transitions 23/679 dead transitions. [2021-11-19 05:09:40,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 679 transitions, 11367 flow [2021-11-19 05:09:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:09:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:09:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2007 transitions. [2021-11-19 05:09:40,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5618701007838746 [2021-11-19 05:09:40,431 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2007 transitions. [2021-11-19 05:09:40,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2007 transitions. [2021-11-19 05:09:40,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:40,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2007 transitions. [2021-11-19 05:09:40,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.81578947368421) internal successors, (2007), 38 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:40,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:40,436 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:40,436 INFO L186 Difference]: Start difference. First operand has 606 places, 648 transitions, 9722 flow. Second operand 38 states and 2007 transitions. [2021-11-19 05:09:40,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 679 transitions, 11367 flow [2021-11-19 05:09:40,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 679 transitions, 11041 flow, removed 60 selfloop flow, removed 33 redundant places. [2021-11-19 05:09:40,822 INFO L242 Difference]: Finished difference. Result has 609 places, 645 transitions, 9733 flow [2021-11-19 05:09:40,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9426, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9733, PETRI_PLACES=609, PETRI_TRANSITIONS=645} [2021-11-19 05:09:40,823 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 521 predicate places. [2021-11-19 05:09:40,824 INFO L470 AbstractCegarLoop]: Abstraction has has 609 places, 645 transitions, 9733 flow [2021-11-19 05:09:40,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:40,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:40,824 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:40,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-11-19 05:09:40,825 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1576999862, now seen corresponding path program 93 times [2021-11-19 05:09:40,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:40,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481757421] [2021-11-19 05:09:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:40,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:41,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:41,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481757421] [2021-11-19 05:09:41,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481757421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:41,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:41,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:09:41,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114068257] [2021-11-19 05:09:41,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:41,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:09:41,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:09:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:09:41,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:41,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 645 transitions, 9733 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:41,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:41,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:41,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:43,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:09:44,922 INFO L129 PetriNetUnfolder]: 440/1424 cut-off events. [2021-11-19 05:09:44,922 INFO L130 PetriNetUnfolder]: For 29708/29708 co-relation queries the response was YES. [2021-11-19 05:09:44,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11695 conditions, 1424 events. 440/1424 cut-off events. For 29708/29708 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9757 event pairs, 47 based on Foata normal form. 1/1422 useless extension candidates. Maximal degree in co-relation 11487. Up to 1000 conditions per place. [2021-11-19 05:09:44,946 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 512 selfloop transitions, 102 changer transitions 21/674 dead transitions. [2021-11-19 05:09:44,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 674 transitions, 11345 flow [2021-11-19 05:09:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:09:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:09:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1995 transitions. [2021-11-19 05:09:44,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-11-19 05:09:44,948 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1995 transitions. [2021-11-19 05:09:44,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1995 transitions. [2021-11-19 05:09:44,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:44,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1995 transitions. [2021-11-19 05:09:44,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.5) internal successors, (1995), 38 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:44,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:44,952 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:44,952 INFO L186 Difference]: Start difference. First operand has 609 places, 645 transitions, 9733 flow. Second operand 38 states and 1995 transitions. [2021-11-19 05:09:44,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 674 transitions, 11345 flow [2021-11-19 05:09:45,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 674 transitions, 10934 flow, removed 61 selfloop flow, removed 35 redundant places. [2021-11-19 05:09:45,336 INFO L242 Difference]: Finished difference. Result has 609 places, 643 transitions, 9588 flow [2021-11-19 05:09:45,337 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9588, PETRI_PLACES=609, PETRI_TRANSITIONS=643} [2021-11-19 05:09:45,338 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 521 predicate places. [2021-11-19 05:09:45,338 INFO L470 AbstractCegarLoop]: Abstraction has has 609 places, 643 transitions, 9588 flow [2021-11-19 05:09:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:45,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:45,339 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:45,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-19 05:09:45,339 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash -370167374, now seen corresponding path program 94 times [2021-11-19 05:09:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:45,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476369387] [2021-11-19 05:09:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:45,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:45,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:45,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476369387] [2021-11-19 05:09:45,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476369387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:45,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:45,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:09:45,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686272003] [2021-11-19 05:09:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:09:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:09:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:09:45,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:45,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 643 transitions, 9588 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:45,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:45,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:45,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:48,045 INFO L129 PetriNetUnfolder]: 432/1414 cut-off events. [2021-11-19 05:09:48,046 INFO L130 PetriNetUnfolder]: For 28561/28561 co-relation queries the response was YES. [2021-11-19 05:09:48,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11451 conditions, 1414 events. 432/1414 cut-off events. For 28561/28561 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9674 event pairs, 48 based on Foata normal form. 1/1413 useless extension candidates. Maximal degree in co-relation 11240. Up to 936 conditions per place. [2021-11-19 05:09:48,083 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 470 selfloop transitions, 121 changer transitions 38/668 dead transitions. [2021-11-19 05:09:48,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 668 transitions, 11010 flow [2021-11-19 05:09:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:09:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:09:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1903 transitions. [2021-11-19 05:09:48,085 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5623522458628841 [2021-11-19 05:09:48,085 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1903 transitions. [2021-11-19 05:09:48,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1903 transitions. [2021-11-19 05:09:48,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:48,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1903 transitions. [2021-11-19 05:09:48,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.861111111111114) internal successors, (1903), 36 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:48,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:48,090 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:48,090 INFO L186 Difference]: Start difference. First operand has 609 places, 643 transitions, 9588 flow. Second operand 36 states and 1903 transitions. [2021-11-19 05:09:48,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 668 transitions, 11010 flow [2021-11-19 05:09:48,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 668 transitions, 10605 flow, removed 68 selfloop flow, removed 35 redundant places. [2021-11-19 05:09:48,555 INFO L242 Difference]: Finished difference. Result has 606 places, 614 transitions, 8901 flow [2021-11-19 05:09:48,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9191, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8901, PETRI_PLACES=606, PETRI_TRANSITIONS=614} [2021-11-19 05:09:48,556 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 518 predicate places. [2021-11-19 05:09:48,558 INFO L470 AbstractCegarLoop]: Abstraction has has 606 places, 614 transitions, 8901 flow [2021-11-19 05:09:48,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:48,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:48,559 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:48,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-11-19 05:09:48,559 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1000130912, now seen corresponding path program 95 times [2021-11-19 05:09:48,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:48,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018445545] [2021-11-19 05:09:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:48,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:49,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:49,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018445545] [2021-11-19 05:09:49,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018445545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:49,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:49,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:09:49,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194255258] [2021-11-19 05:09:49,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:49,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:09:49,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:09:49,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:09:49,003 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:49,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 614 transitions, 8901 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:49,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:49,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:49,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:51,336 INFO L129 PetriNetUnfolder]: 417/1372 cut-off events. [2021-11-19 05:09:51,336 INFO L130 PetriNetUnfolder]: For 26847/26847 co-relation queries the response was YES. [2021-11-19 05:09:51,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10921 conditions, 1372 events. 417/1372 cut-off events. For 26847/26847 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9302 event pairs, 49 based on Foata normal form. 1/1371 useless extension candidates. Maximal degree in co-relation 10711. Up to 927 conditions per place. [2021-11-19 05:09:51,374 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 462 selfloop transitions, 115 changer transitions 23/639 dead transitions. [2021-11-19 05:09:51,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 639 transitions, 10265 flow [2021-11-19 05:09:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:09:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:09:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1952 transitions. [2021-11-19 05:09:51,376 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5612420931569868 [2021-11-19 05:09:51,376 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1952 transitions. [2021-11-19 05:09:51,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1952 transitions. [2021-11-19 05:09:51,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:51,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1952 transitions. [2021-11-19 05:09:51,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.75675675675676) internal successors, (1952), 37 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:51,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:51,381 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:51,381 INFO L186 Difference]: Start difference. First operand has 606 places, 614 transitions, 8901 flow. Second operand 37 states and 1952 transitions. [2021-11-19 05:09:51,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 639 transitions, 10265 flow [2021-11-19 05:09:51,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 639 transitions, 9711 flow, removed 89 selfloop flow, removed 42 redundant places. [2021-11-19 05:09:51,752 INFO L242 Difference]: Finished difference. Result has 592 places, 600 transitions, 8394 flow [2021-11-19 05:09:51,753 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8355, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8394, PETRI_PLACES=592, PETRI_TRANSITIONS=600} [2021-11-19 05:09:51,754 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 504 predicate places. [2021-11-19 05:09:51,754 INFO L470 AbstractCegarLoop]: Abstraction has has 592 places, 600 transitions, 8394 flow [2021-11-19 05:09:51,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:51,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:51,755 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:51,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-11-19 05:09:51,755 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1384720420, now seen corresponding path program 96 times [2021-11-19 05:09:51,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:51,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917354994] [2021-11-19 05:09:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:51,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:52,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:52,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917354994] [2021-11-19 05:09:52,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917354994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:52,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:52,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:09:52,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730926712] [2021-11-19 05:09:52,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:52,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:09:52,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:52,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:09:52,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:09:52,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:52,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 600 transitions, 8394 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:52,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:52,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:52,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:54,614 INFO L129 PetriNetUnfolder]: 416/1357 cut-off events. [2021-11-19 05:09:54,614 INFO L130 PetriNetUnfolder]: For 27414/27414 co-relation queries the response was YES. [2021-11-19 05:09:54,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10729 conditions, 1357 events. 416/1357 cut-off events. For 27414/27414 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9188 event pairs, 37 based on Foata normal form. 1/1356 useless extension candidates. Maximal degree in co-relation 10526. Up to 928 conditions per place. [2021-11-19 05:09:54,650 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 454 selfloop transitions, 119 changer transitions 16/628 dead transitions. [2021-11-19 05:09:54,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 628 transitions, 9947 flow [2021-11-19 05:09:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:09:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:09:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1853 transitions. [2021-11-19 05:09:54,652 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5632218844984802 [2021-11-19 05:09:54,652 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1853 transitions. [2021-11-19 05:09:54,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1853 transitions. [2021-11-19 05:09:54,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:54,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1853 transitions. [2021-11-19 05:09:54,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.94285714285714) internal successors, (1853), 35 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:54,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:54,657 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:54,657 INFO L186 Difference]: Start difference. First operand has 592 places, 600 transitions, 8394 flow. Second operand 35 states and 1853 transitions. [2021-11-19 05:09:54,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 628 transitions, 9947 flow [2021-11-19 05:09:54,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 628 transitions, 9581 flow, removed 30 selfloop flow, removed 37 redundant places. [2021-11-19 05:09:54,993 INFO L242 Difference]: Finished difference. Result has 580 places, 602 transitions, 8424 flow [2021-11-19 05:09:54,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8054, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8424, PETRI_PLACES=580, PETRI_TRANSITIONS=602} [2021-11-19 05:09:54,994 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 492 predicate places. [2021-11-19 05:09:54,994 INFO L470 AbstractCegarLoop]: Abstraction has has 580 places, 602 transitions, 8424 flow [2021-11-19 05:09:54,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:54,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:54,994 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:54,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-11-19 05:09:54,994 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1713706566, now seen corresponding path program 97 times [2021-11-19 05:09:54,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:54,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580465360] [2021-11-19 05:09:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:54,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:55,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:55,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580465360] [2021-11-19 05:09:55,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580465360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:55,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:55,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:09:55,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752270010] [2021-11-19 05:09:55,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:55,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:09:55,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:09:55,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:09:55,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:55,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 602 transitions, 8424 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:55,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:55,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:55,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:09:57,638 INFO L129 PetriNetUnfolder]: 413/1344 cut-off events. [2021-11-19 05:09:57,638 INFO L130 PetriNetUnfolder]: For 26611/26611 co-relation queries the response was YES. [2021-11-19 05:09:57,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10555 conditions, 1344 events. 413/1344 cut-off events. For 26611/26611 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9015 event pairs, 35 based on Foata normal form. 1/1342 useless extension candidates. Maximal degree in co-relation 10355. Up to 951 conditions per place. [2021-11-19 05:09:57,661 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 478 selfloop transitions, 81 changer transitions 26/624 dead transitions. [2021-11-19 05:09:57,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 624 transitions, 9720 flow [2021-11-19 05:09:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:09:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:09:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1840 transitions. [2021-11-19 05:09:57,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2021-11-19 05:09:57,662 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1840 transitions. [2021-11-19 05:09:57,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1840 transitions. [2021-11-19 05:09:57,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:09:57,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1840 transitions. [2021-11-19 05:09:57,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.57142857142857) internal successors, (1840), 35 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:57,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:57,666 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:57,666 INFO L186 Difference]: Start difference. First operand has 580 places, 602 transitions, 8424 flow. Second operand 35 states and 1840 transitions. [2021-11-19 05:09:57,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 624 transitions, 9720 flow [2021-11-19 05:09:57,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 624 transitions, 9362 flow, removed 74 selfloop flow, removed 32 redundant places. [2021-11-19 05:09:57,969 INFO L242 Difference]: Finished difference. Result has 581 places, 586 transitions, 7909 flow [2021-11-19 05:09:57,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8072, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7909, PETRI_PLACES=581, PETRI_TRANSITIONS=586} [2021-11-19 05:09:57,970 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 493 predicate places. [2021-11-19 05:09:57,970 INFO L470 AbstractCegarLoop]: Abstraction has has 581 places, 586 transitions, 7909 flow [2021-11-19 05:09:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:57,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:09:57,971 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:57,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-11-19 05:09:57,971 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:09:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -787525924, now seen corresponding path program 98 times [2021-11-19 05:09:57,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:57,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852091026] [2021-11-19 05:09:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:57,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:09:58,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:58,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852091026] [2021-11-19 05:09:58,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852091026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:09:58,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:09:58,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:09:58,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898840447] [2021-11-19 05:09:58,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:09:58,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:09:58,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:58,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:09:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:09:58,412 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:09:58,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 586 transitions, 7909 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:09:58,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:09:58,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:09:58,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:00,271 INFO L129 PetriNetUnfolder]: 408/1330 cut-off events. [2021-11-19 05:10:00,271 INFO L130 PetriNetUnfolder]: For 24885/24885 co-relation queries the response was YES. [2021-11-19 05:10:00,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10240 conditions, 1330 events. 408/1330 cut-off events. For 24885/24885 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8914 event pairs, 47 based on Foata normal form. 1/1330 useless extension candidates. Maximal degree in co-relation 10041. Up to 909 conditions per place. [2021-11-19 05:10:00,305 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 443 selfloop transitions, 81 changer transitions 48/611 dead transitions. [2021-11-19 05:10:00,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 611 transitions, 9200 flow [2021-11-19 05:10:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:10:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:10:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1848 transitions. [2021-11-19 05:10:00,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2021-11-19 05:10:00,307 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1848 transitions. [2021-11-19 05:10:00,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1848 transitions. [2021-11-19 05:10:00,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:00,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1848 transitions. [2021-11-19 05:10:00,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.8) internal successors, (1848), 35 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:00,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:00,312 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:00,312 INFO L186 Difference]: Start difference. First operand has 581 places, 586 transitions, 7909 flow. Second operand 35 states and 1848 transitions. [2021-11-19 05:10:00,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 611 transitions, 9200 flow [2021-11-19 05:10:00,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 611 transitions, 8932 flow, removed 25 selfloop flow, removed 33 redundant places. [2021-11-19 05:10:00,638 INFO L242 Difference]: Finished difference. Result has 568 places, 554 transitions, 7282 flow [2021-11-19 05:10:00,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7647, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7282, PETRI_PLACES=568, PETRI_TRANSITIONS=554} [2021-11-19 05:10:00,639 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 480 predicate places. [2021-11-19 05:10:00,639 INFO L470 AbstractCegarLoop]: Abstraction has has 568 places, 554 transitions, 7282 flow [2021-11-19 05:10:00,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:00,639 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:00,639 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:00,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-11-19 05:10:00,640 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1281867160, now seen corresponding path program 99 times [2021-11-19 05:10:00,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:00,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308272699] [2021-11-19 05:10:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:00,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:01,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:01,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308272699] [2021-11-19 05:10:01,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308272699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:01,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:01,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:10:01,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950794652] [2021-11-19 05:10:01,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:01,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:10:01,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:01,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:10:01,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:10:01,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:01,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 554 transitions, 7282 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:01,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:01,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:01,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:03,088 INFO L129 PetriNetUnfolder]: 396/1274 cut-off events. [2021-11-19 05:10:03,088 INFO L130 PetriNetUnfolder]: For 24287/24287 co-relation queries the response was YES. [2021-11-19 05:10:03,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9750 conditions, 1274 events. 396/1274 cut-off events. For 24287/24287 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8287 event pairs, 49 based on Foata normal form. 1/1271 useless extension candidates. Maximal degree in co-relation 9554. Up to 886 conditions per place. [2021-11-19 05:10:03,118 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 433 selfloop transitions, 84 changer transitions 22/578 dead transitions. [2021-11-19 05:10:03,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 578 transitions, 8501 flow [2021-11-19 05:10:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:10:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:10:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1789 transitions. [2021-11-19 05:10:03,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5597622027534418 [2021-11-19 05:10:03,120 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1789 transitions. [2021-11-19 05:10:03,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1789 transitions. [2021-11-19 05:10:03,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:03,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1789 transitions. [2021-11-19 05:10:03,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.61764705882353) internal successors, (1789), 34 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:03,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:03,124 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:03,124 INFO L186 Difference]: Start difference. First operand has 568 places, 554 transitions, 7282 flow. Second operand 34 states and 1789 transitions. [2021-11-19 05:10:03,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 578 transitions, 8501 flow [2021-11-19 05:10:03,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 578 transitions, 8095 flow, removed 77 selfloop flow, removed 45 redundant places. [2021-11-19 05:10:03,368 INFO L242 Difference]: Finished difference. Result has 552 places, 547 transitions, 6971 flow [2021-11-19 05:10:03,368 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6882, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6971, PETRI_PLACES=552, PETRI_TRANSITIONS=547} [2021-11-19 05:10:03,369 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 464 predicate places. [2021-11-19 05:10:03,369 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 547 transitions, 6971 flow [2021-11-19 05:10:03,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:03,369 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:03,369 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:03,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-11-19 05:10:03,369 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:03,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1752549716, now seen corresponding path program 100 times [2021-11-19 05:10:03,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:03,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663666221] [2021-11-19 05:10:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:03,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:03,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:03,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663666221] [2021-11-19 05:10:03,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663666221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:03,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:03,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:10:03,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722598935] [2021-11-19 05:10:03,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:03,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:10:03,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:10:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:10:03,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:03,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 547 transitions, 6971 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:03,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:03,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:03,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:07,195 INFO L129 PetriNetUnfolder]: 393/1248 cut-off events. [2021-11-19 05:10:07,195 INFO L130 PetriNetUnfolder]: For 23731/23731 co-relation queries the response was YES. [2021-11-19 05:10:07,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9520 conditions, 1248 events. 393/1248 cut-off events. For 23731/23731 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8048 event pairs, 46 based on Foata normal form. 1/1247 useless extension candidates. Maximal degree in co-relation 9327. Up to 894 conditions per place. [2021-11-19 05:10:07,222 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 432 selfloop transitions, 81 changer transitions 16/568 dead transitions. [2021-11-19 05:10:07,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 568 transitions, 8228 flow [2021-11-19 05:10:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:10:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:10:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1937 transitions. [2021-11-19 05:10:07,224 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569292696952272 [2021-11-19 05:10:07,224 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1937 transitions. [2021-11-19 05:10:07,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1937 transitions. [2021-11-19 05:10:07,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:07,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1937 transitions. [2021-11-19 05:10:07,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.351351351351354) internal successors, (1937), 37 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:07,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:07,228 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:07,228 INFO L186 Difference]: Start difference. First operand has 552 places, 547 transitions, 6971 flow. Second operand 37 states and 1937 transitions. [2021-11-19 05:10:07,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 568 transitions, 8228 flow [2021-11-19 05:10:07,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 568 transitions, 7956 flow, removed 22 selfloop flow, removed 39 redundant places. [2021-11-19 05:10:07,508 INFO L242 Difference]: Finished difference. Result has 539 places, 542 transitions, 6849 flow [2021-11-19 05:10:07,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6707, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6849, PETRI_PLACES=539, PETRI_TRANSITIONS=542} [2021-11-19 05:10:07,509 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 451 predicate places. [2021-11-19 05:10:07,509 INFO L470 AbstractCegarLoop]: Abstraction has has 539 places, 542 transitions, 6849 flow [2021-11-19 05:10:07,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:07,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:07,510 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:07,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-11-19 05:10:07,511 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:07,511 INFO L85 PathProgramCache]: Analyzing trace with hash -996045950, now seen corresponding path program 101 times [2021-11-19 05:10:07,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:07,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276984300] [2021-11-19 05:10:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:07,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:08,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:08,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276984300] [2021-11-19 05:10:08,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276984300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:08,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:08,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:10:08,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440632189] [2021-11-19 05:10:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:08,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:10:08,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:10:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:10:08,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:08,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 542 transitions, 6849 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:08,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:08,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:08,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:10,088 INFO L129 PetriNetUnfolder]: 389/1248 cut-off events. [2021-11-19 05:10:10,088 INFO L130 PetriNetUnfolder]: For 23623/23623 co-relation queries the response was YES. [2021-11-19 05:10:10,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9396 conditions, 1248 events. 389/1248 cut-off events. For 23623/23623 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8086 event pairs, 35 based on Foata normal form. 1/1248 useless extension candidates. Maximal degree in co-relation 9211. Up to 892 conditions per place. [2021-11-19 05:10:10,119 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 430 selfloop transitions, 63 changer transitions 29/561 dead transitions. [2021-11-19 05:10:10,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 561 transitions, 7981 flow [2021-11-19 05:10:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:10:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:10:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1832 transitions. [2021-11-19 05:10:10,124 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.556838905775076 [2021-11-19 05:10:10,124 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1832 transitions. [2021-11-19 05:10:10,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1832 transitions. [2021-11-19 05:10:10,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:10,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1832 transitions. [2021-11-19 05:10:10,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.34285714285714) internal successors, (1832), 35 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:10,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:10,132 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:10,132 INFO L186 Difference]: Start difference. First operand has 539 places, 542 transitions, 6849 flow. Second operand 35 states and 1832 transitions. [2021-11-19 05:10:10,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 561 transitions, 7981 flow [2021-11-19 05:10:10,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 561 transitions, 7752 flow, removed 13 selfloop flow, removed 37 redundant places. [2021-11-19 05:10:10,376 INFO L242 Difference]: Finished difference. Result has 532 places, 523 transitions, 6510 flow [2021-11-19 05:10:10,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6628, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6510, PETRI_PLACES=532, PETRI_TRANSITIONS=523} [2021-11-19 05:10:10,377 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 444 predicate places. [2021-11-19 05:10:10,377 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 523 transitions, 6510 flow [2021-11-19 05:10:10,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:10,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:10,378 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:10,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-11-19 05:10:10,379 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:10,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:10,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1145661502, now seen corresponding path program 102 times [2021-11-19 05:10:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:10,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128711148] [2021-11-19 05:10:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:10,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:10,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:10,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128711148] [2021-11-19 05:10:10,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128711148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:10,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:10,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:10:10,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889886126] [2021-11-19 05:10:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:10,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:10:10,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:10:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:10:10,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:10,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 523 transitions, 6510 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:10,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:10,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:10,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:12,709 INFO L129 PetriNetUnfolder]: 383/1230 cut-off events. [2021-11-19 05:10:12,709 INFO L130 PetriNetUnfolder]: For 22628/22628 co-relation queries the response was YES. [2021-11-19 05:10:12,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 1230 events. 383/1230 cut-off events. For 22628/22628 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7908 event pairs, 35 based on Foata normal form. 1/1230 useless extension candidates. Maximal degree in co-relation 8906. Up to 832 conditions per place. [2021-11-19 05:10:12,735 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 391 selfloop transitions, 93 changer transitions 19/542 dead transitions. [2021-11-19 05:10:12,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 542 transitions, 7617 flow [2021-11-19 05:10:12,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:10:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:10:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1794 transitions. [2021-11-19 05:10:12,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613266583229036 [2021-11-19 05:10:12,737 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1794 transitions. [2021-11-19 05:10:12,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1794 transitions. [2021-11-19 05:10:12,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:12,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1794 transitions. [2021-11-19 05:10:12,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.76470588235294) internal successors, (1794), 34 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:12,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:12,741 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:12,741 INFO L186 Difference]: Start difference. First operand has 532 places, 523 transitions, 6510 flow. Second operand 34 states and 1794 transitions. [2021-11-19 05:10:12,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 542 transitions, 7617 flow [2021-11-19 05:10:12,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 542 transitions, 7341 flow, removed 31 selfloop flow, removed 33 redundant places. [2021-11-19 05:10:12,955 INFO L242 Difference]: Finished difference. Result has 509 places, 513 transitions, 6368 flow [2021-11-19 05:10:12,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6368, PETRI_PLACES=509, PETRI_TRANSITIONS=513} [2021-11-19 05:10:12,955 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 421 predicate places. [2021-11-19 05:10:12,956 INFO L470 AbstractCegarLoop]: Abstraction has has 509 places, 513 transitions, 6368 flow [2021-11-19 05:10:12,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:12,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:12,956 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, 1, 1] [2021-11-19 05:10:12,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-11-19 05:10:12,956 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:12,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1373972820, now seen corresponding path program 103 times [2021-11-19 05:10:12,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:12,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255573802] [2021-11-19 05:10:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:12,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:13,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:13,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255573802] [2021-11-19 05:10:13,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255573802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:13,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:13,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:10:13,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367727098] [2021-11-19 05:10:13,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:13,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:10:13,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:10:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:10:13,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:13,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 513 transitions, 6368 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:13,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:13,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:13,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:16,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:10:18,310 INFO L129 PetriNetUnfolder]: 379/1213 cut-off events. [2021-11-19 05:10:18,310 INFO L130 PetriNetUnfolder]: For 21300/21300 co-relation queries the response was YES. [2021-11-19 05:10:18,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8893 conditions, 1213 events. 379/1213 cut-off events. For 21300/21300 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7769 event pairs, 38 based on Foata normal form. 1/1211 useless extension candidates. Maximal degree in co-relation 8716. Up to 840 conditions per place. [2021-11-19 05:10:18,336 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 395 selfloop transitions, 73 changer transitions 24/531 dead transitions. [2021-11-19 05:10:18,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 531 transitions, 7454 flow [2021-11-19 05:10:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:10:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:10:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1783 transitions. [2021-11-19 05:10:18,338 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5578848560700876 [2021-11-19 05:10:18,338 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1783 transitions. [2021-11-19 05:10:18,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1783 transitions. [2021-11-19 05:10:18,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:18,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1783 transitions. [2021-11-19 05:10:18,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.44117647058823) internal successors, (1783), 34 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:18,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:18,343 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:18,343 INFO L186 Difference]: Start difference. First operand has 509 places, 513 transitions, 6368 flow. Second operand 34 states and 1783 transitions. [2021-11-19 05:10:18,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 531 transitions, 7454 flow [2021-11-19 05:10:18,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 531 transitions, 7172 flow, removed 19 selfloop flow, removed 36 redundant places. [2021-11-19 05:10:18,568 INFO L242 Difference]: Finished difference. Result has 496 places, 498 transitions, 6118 flow [2021-11-19 05:10:18,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6118, PETRI_PLACES=496, PETRI_TRANSITIONS=498} [2021-11-19 05:10:18,569 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 408 predicate places. [2021-11-19 05:10:18,569 INFO L470 AbstractCegarLoop]: Abstraction has has 496 places, 498 transitions, 6118 flow [2021-11-19 05:10:18,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:18,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:18,569 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:18,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-11-19 05:10:18,570 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:18,570 INFO L85 PathProgramCache]: Analyzing trace with hash 152102026, now seen corresponding path program 104 times [2021-11-19 05:10:18,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:18,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891877267] [2021-11-19 05:10:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:18,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:19,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:19,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891877267] [2021-11-19 05:10:19,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891877267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:19,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:19,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:10:19,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826492542] [2021-11-19 05:10:19,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:19,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:10:19,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:10:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:10:19,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:19,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 498 transitions, 6118 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:19,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:19,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:19,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:21,290 INFO L129 PetriNetUnfolder]: 376/1177 cut-off events. [2021-11-19 05:10:21,291 INFO L130 PetriNetUnfolder]: For 19829/19829 co-relation queries the response was YES. [2021-11-19 05:10:21,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8691 conditions, 1177 events. 376/1177 cut-off events. For 19829/19829 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7393 event pairs, 46 based on Foata normal form. 1/1176 useless extension candidates. Maximal degree in co-relation 8519. Up to 839 conditions per place. [2021-11-19 05:10:21,317 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 391 selfloop transitions, 74 changer transitions 16/520 dead transitions. [2021-11-19 05:10:21,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 520 transitions, 7272 flow [2021-11-19 05:10:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:10:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:10:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1882 transitions. [2021-11-19 05:10:21,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.556146572104019 [2021-11-19 05:10:21,319 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1882 transitions. [2021-11-19 05:10:21,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1882 transitions. [2021-11-19 05:10:21,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:21,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1882 transitions. [2021-11-19 05:10:21,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.27777777777778) internal successors, (1882), 36 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:21,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:21,325 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:21,325 INFO L186 Difference]: Start difference. First operand has 496 places, 498 transitions, 6118 flow. Second operand 36 states and 1882 transitions. [2021-11-19 05:10:21,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 520 transitions, 7272 flow [2021-11-19 05:10:21,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 520 transitions, 7032 flow, removed 21 selfloop flow, removed 34 redundant places. [2021-11-19 05:10:21,571 INFO L242 Difference]: Finished difference. Result has 480 places, 494 transitions, 6039 flow [2021-11-19 05:10:21,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6039, PETRI_PLACES=480, PETRI_TRANSITIONS=494} [2021-11-19 05:10:21,572 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 392 predicate places. [2021-11-19 05:10:21,572 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 494 transitions, 6039 flow [2021-11-19 05:10:21,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:21,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:21,572 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:21,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-11-19 05:10:21,572 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1052898506, now seen corresponding path program 105 times [2021-11-19 05:10:21,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:21,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232860363] [2021-11-19 05:10:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:21,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:22,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:22,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232860363] [2021-11-19 05:10:22,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232860363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:22,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:22,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:10:22,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281179684] [2021-11-19 05:10:22,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:22,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:10:22,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:22,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:10:22,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:10:22,063 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:22,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 494 transitions, 6039 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:22,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:22,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:22,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:24,590 INFO L129 PetriNetUnfolder]: 375/1187 cut-off events. [2021-11-19 05:10:24,591 INFO L130 PetriNetUnfolder]: For 19889/19889 co-relation queries the response was YES. [2021-11-19 05:10:24,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8666 conditions, 1187 events. 375/1187 cut-off events. For 19889/19889 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7532 event pairs, 45 based on Foata normal form. 1/1186 useless extension candidates. Maximal degree in co-relation 8500. Up to 809 conditions per place. [2021-11-19 05:10:24,616 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 351 selfloop transitions, 114 changer transitions 19/523 dead transitions. [2021-11-19 05:10:24,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 523 transitions, 7252 flow [2021-11-19 05:10:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:10:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-19 05:10:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2300 transitions. [2021-11-19 05:10:24,619 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5560928433268859 [2021-11-19 05:10:24,619 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2300 transitions. [2021-11-19 05:10:24,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2300 transitions. [2021-11-19 05:10:24,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:24,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2300 transitions. [2021-11-19 05:10:24,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.27272727272727) internal successors, (2300), 44 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:24,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:24,625 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:24,625 INFO L186 Difference]: Start difference. First operand has 480 places, 494 transitions, 6039 flow. Second operand 44 states and 2300 transitions. [2021-11-19 05:10:24,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 523 transitions, 7252 flow [2021-11-19 05:10:24,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 523 transitions, 7052 flow, removed 11 selfloop flow, removed 34 redundant places. [2021-11-19 05:10:24,858 INFO L242 Difference]: Finished difference. Result has 488 places, 491 transitions, 6086 flow [2021-11-19 05:10:24,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5845, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6086, PETRI_PLACES=488, PETRI_TRANSITIONS=491} [2021-11-19 05:10:24,859 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 400 predicate places. [2021-11-19 05:10:24,859 INFO L470 AbstractCegarLoop]: Abstraction has has 488 places, 491 transitions, 6086 flow [2021-11-19 05:10:24,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:24,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:24,859 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:24,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-11-19 05:10:24,860 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1106005084, now seen corresponding path program 106 times [2021-11-19 05:10:24,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:24,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313444147] [2021-11-19 05:10:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:24,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:25,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:25,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313444147] [2021-11-19 05:10:25,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313444147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:25,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:25,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:10:25,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773277741] [2021-11-19 05:10:25,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:25,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:10:25,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:10:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:10:25,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:25,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 491 transitions, 6086 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:25,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:25,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:25,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:27,054 INFO L129 PetriNetUnfolder]: 370/1174 cut-off events. [2021-11-19 05:10:27,054 INFO L130 PetriNetUnfolder]: For 20154/20154 co-relation queries the response was YES. [2021-11-19 05:10:27,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8593 conditions, 1174 events. 370/1174 cut-off events. For 20154/20154 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7399 event pairs, 39 based on Foata normal form. 1/1173 useless extension candidates. Maximal degree in co-relation 8426. Up to 808 conditions per place. [2021-11-19 05:10:27,074 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 362 selfloop transitions, 63 changer transitions 46/510 dead transitions. [2021-11-19 05:10:27,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 510 transitions, 7110 flow [2021-11-19 05:10:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:10:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:10:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-11-19 05:10:27,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-11-19 05:10:27,076 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-11-19 05:10:27,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-11-19 05:10:27,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:27,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-11-19 05:10:27,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:27,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:27,083 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:27,083 INFO L186 Difference]: Start difference. First operand has 488 places, 491 transitions, 6086 flow. Second operand 31 states and 1639 transitions. [2021-11-19 05:10:27,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 510 transitions, 7110 flow [2021-11-19 05:10:27,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 510 transitions, 6822 flow, removed 10 selfloop flow, removed 44 redundant places. [2021-11-19 05:10:27,292 INFO L242 Difference]: Finished difference. Result has 470 places, 455 transitions, 5565 flow [2021-11-19 05:10:27,292 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5565, PETRI_PLACES=470, PETRI_TRANSITIONS=455} [2021-11-19 05:10:27,292 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 382 predicate places. [2021-11-19 05:10:27,292 INFO L470 AbstractCegarLoop]: Abstraction has has 470 places, 455 transitions, 5565 flow [2021-11-19 05:10:27,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:27,293 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:27,293 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:27,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-11-19 05:10:27,293 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1887273600, now seen corresponding path program 107 times [2021-11-19 05:10:27,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:27,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459639018] [2021-11-19 05:10:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:27,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:27,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:27,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459639018] [2021-11-19 05:10:27,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459639018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:27,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:27,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:10:27,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084896681] [2021-11-19 05:10:27,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:27,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:10:27,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:10:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:10:27,739 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:27,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 455 transitions, 5565 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:27,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:27,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:27,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:30,720 INFO L129 PetriNetUnfolder]: 369/1160 cut-off events. [2021-11-19 05:10:30,720 INFO L130 PetriNetUnfolder]: For 20654/20654 co-relation queries the response was YES. [2021-11-19 05:10:30,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8484 conditions, 1160 events. 369/1160 cut-off events. For 20654/20654 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7289 event pairs, 35 based on Foata normal form. 1/1159 useless extension candidates. Maximal degree in co-relation 8320. Up to 767 conditions per place. [2021-11-19 05:10:30,747 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 327 selfloop transitions, 108 changer transitions 26/500 dead transitions. [2021-11-19 05:10:30,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 500 transitions, 7103 flow [2021-11-19 05:10:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:10:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:10:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1903 transitions. [2021-11-19 05:10:30,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5623522458628841 [2021-11-19 05:10:30,749 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1903 transitions. [2021-11-19 05:10:30,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1903 transitions. [2021-11-19 05:10:30,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:30,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1903 transitions. [2021-11-19 05:10:30,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.861111111111114) internal successors, (1903), 36 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:30,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:30,754 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:30,754 INFO L186 Difference]: Start difference. First operand has 470 places, 455 transitions, 5565 flow. Second operand 36 states and 1903 transitions. [2021-11-19 05:10:30,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 500 transitions, 7103 flow [2021-11-19 05:10:30,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 500 transitions, 6754 flow, removed 40 selfloop flow, removed 53 redundant places. [2021-11-19 05:10:30,949 INFO L242 Difference]: Finished difference. Result has 441 places, 460 transitions, 5652 flow [2021-11-19 05:10:30,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5652, PETRI_PLACES=441, PETRI_TRANSITIONS=460} [2021-11-19 05:10:30,950 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 353 predicate places. [2021-11-19 05:10:30,950 INFO L470 AbstractCegarLoop]: Abstraction has has 441 places, 460 transitions, 5652 flow [2021-11-19 05:10:30,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:30,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:30,950 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:30,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-11-19 05:10:30,951 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:30,951 INFO L85 PathProgramCache]: Analyzing trace with hash 366227484, now seen corresponding path program 108 times [2021-11-19 05:10:30,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:30,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704693374] [2021-11-19 05:10:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:30,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:31,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:31,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704693374] [2021-11-19 05:10:31,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704693374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:31,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:31,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:10:31,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281087256] [2021-11-19 05:10:31,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:31,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:10:31,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:10:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:10:31,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:31,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 460 transitions, 5652 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:31,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:31,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:31,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:34,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:10:35,742 INFO L129 PetriNetUnfolder]: 360/1145 cut-off events. [2021-11-19 05:10:35,742 INFO L130 PetriNetUnfolder]: For 19145/19145 co-relation queries the response was YES. [2021-11-19 05:10:35,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8277 conditions, 1145 events. 360/1145 cut-off events. For 19145/19145 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7213 event pairs, 36 based on Foata normal form. 1/1143 useless extension candidates. Maximal degree in co-relation 8122. Up to 760 conditions per place. [2021-11-19 05:10:35,761 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 326 selfloop transitions, 106 changer transitions 27/498 dead transitions. [2021-11-19 05:10:35,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 498 transitions, 6960 flow [2021-11-19 05:10:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:10:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:10:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2007 transitions. [2021-11-19 05:10:35,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5618701007838746 [2021-11-19 05:10:35,764 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2007 transitions. [2021-11-19 05:10:35,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2007 transitions. [2021-11-19 05:10:35,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:35,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2007 transitions. [2021-11-19 05:10:35,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.81578947368421) internal successors, (2007), 38 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:35,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:35,769 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:35,769 INFO L186 Difference]: Start difference. First operand has 441 places, 460 transitions, 5652 flow. Second operand 38 states and 2007 transitions. [2021-11-19 05:10:35,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 498 transitions, 6960 flow [2021-11-19 05:10:35,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 498 transitions, 6703 flow, removed 61 selfloop flow, removed 27 redundant places. [2021-11-19 05:10:35,963 INFO L242 Difference]: Finished difference. Result has 452 places, 454 transitions, 5625 flow [2021-11-19 05:10:35,963 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5407, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5625, PETRI_PLACES=452, PETRI_TRANSITIONS=454} [2021-11-19 05:10:35,964 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 364 predicate places. [2021-11-19 05:10:35,964 INFO L470 AbstractCegarLoop]: Abstraction has has 452 places, 454 transitions, 5625 flow [2021-11-19 05:10:35,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:35,964 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:35,964 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:35,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-11-19 05:10:35,964 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1163651836, now seen corresponding path program 109 times [2021-11-19 05:10:35,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:35,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519206589] [2021-11-19 05:10:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:35,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:36,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:36,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519206589] [2021-11-19 05:10:36,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519206589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:36,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:36,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:10:36,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001217157] [2021-11-19 05:10:36,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:36,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:10:36,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:10:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:10:36,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:36,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 454 transitions, 5625 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:36,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:36,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:36,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:38,484 INFO L129 PetriNetUnfolder]: 350/1109 cut-off events. [2021-11-19 05:10:38,484 INFO L130 PetriNetUnfolder]: For 18390/18390 co-relation queries the response was YES. [2021-11-19 05:10:38,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8080 conditions, 1109 events. 350/1109 cut-off events. For 18390/18390 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6881 event pairs, 36 based on Foata normal form. 1/1108 useless extension candidates. Maximal degree in co-relation 7922. Up to 797 conditions per place. [2021-11-19 05:10:38,507 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 358 selfloop transitions, 51 changer transitions 25/473 dead transitions. [2021-11-19 05:10:38,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 473 transitions, 6573 flow [2021-11-19 05:10:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:10:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:10:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1671 transitions. [2021-11-19 05:10:38,509 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5555186170212766 [2021-11-19 05:10:38,510 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1671 transitions. [2021-11-19 05:10:38,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1671 transitions. [2021-11-19 05:10:38,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:38,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1671 transitions. [2021-11-19 05:10:38,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.21875) internal successors, (1671), 32 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:38,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:38,514 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:38,514 INFO L186 Difference]: Start difference. First operand has 452 places, 454 transitions, 5625 flow. Second operand 32 states and 1671 transitions. [2021-11-19 05:10:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 473 transitions, 6573 flow [2021-11-19 05:10:38,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 473 transitions, 6299 flow, removed 32 selfloop flow, removed 33 redundant places. [2021-11-19 05:10:38,706 INFO L242 Difference]: Finished difference. Result has 443 places, 439 transitions, 5354 flow [2021-11-19 05:10:38,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5354, PETRI_PLACES=443, PETRI_TRANSITIONS=439} [2021-11-19 05:10:38,706 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 355 predicate places. [2021-11-19 05:10:38,707 INFO L470 AbstractCegarLoop]: Abstraction has has 443 places, 439 transitions, 5354 flow [2021-11-19 05:10:38,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:38,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:38,707 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:38,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-11-19 05:10:38,707 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:38,708 INFO L85 PathProgramCache]: Analyzing trace with hash 300698978, now seen corresponding path program 110 times [2021-11-19 05:10:38,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:38,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213397782] [2021-11-19 05:10:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:38,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:39,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:39,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213397782] [2021-11-19 05:10:39,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213397782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:39,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:39,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:10:39,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117397747] [2021-11-19 05:10:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:39,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:10:39,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:39,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:10:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:10:39,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:39,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 439 transitions, 5354 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:39,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:39,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:39,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:42,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:10:43,561 INFO L129 PetriNetUnfolder]: 352/1119 cut-off events. [2021-11-19 05:10:43,561 INFO L130 PetriNetUnfolder]: For 17306/17306 co-relation queries the response was YES. [2021-11-19 05:10:43,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7922 conditions, 1119 events. 352/1119 cut-off events. For 17306/17306 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6965 event pairs, 51 based on Foata normal form. 1/1118 useless extension candidates. Maximal degree in co-relation 7771. Up to 750 conditions per place. [2021-11-19 05:10:43,579 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 312 selfloop transitions, 99 changer transitions 19/469 dead transitions. [2021-11-19 05:10:43,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 469 transitions, 6468 flow [2021-11-19 05:10:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:10:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:10:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2021-11-19 05:10:43,581 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2021-11-19 05:10:43,581 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2021-11-19 05:10:43,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2021-11-19 05:10:43,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:43,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2021-11-19 05:10:43,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:43,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:43,585 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:43,585 INFO L186 Difference]: Start difference. First operand has 443 places, 439 transitions, 5354 flow. Second operand 33 states and 1745 transitions. [2021-11-19 05:10:43,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 469 transitions, 6468 flow [2021-11-19 05:10:43,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 469 transitions, 6088 flow, removed 38 selfloop flow, removed 32 redundant places. [2021-11-19 05:10:43,738 INFO L242 Difference]: Finished difference. Result has 420 places, 437 transitions, 5221 flow [2021-11-19 05:10:43,739 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5221, PETRI_PLACES=420, PETRI_TRANSITIONS=437} [2021-11-19 05:10:43,739 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 332 predicate places. [2021-11-19 05:10:43,739 INFO L470 AbstractCegarLoop]: Abstraction has has 420 places, 437 transitions, 5221 flow [2021-11-19 05:10:43,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:43,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:43,740 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:43,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-11-19 05:10:43,740 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1619506858, now seen corresponding path program 111 times [2021-11-19 05:10:43,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:43,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698592066] [2021-11-19 05:10:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:43,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:44,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:44,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698592066] [2021-11-19 05:10:44,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698592066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:44,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:44,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:10:44,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20248178] [2021-11-19 05:10:44,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:44,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:10:44,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:10:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:10:44,180 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:44,182 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 437 transitions, 5221 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:44,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:44,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:44,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:46,736 INFO L129 PetriNetUnfolder]: 359/1131 cut-off events. [2021-11-19 05:10:46,736 INFO L130 PetriNetUnfolder]: For 15935/15935 co-relation queries the response was YES. [2021-11-19 05:10:46,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7843 conditions, 1131 events. 359/1131 cut-off events. For 15935/15935 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7079 event pairs, 50 based on Foata normal form. 1/1131 useless extension candidates. Maximal degree in co-relation 7701. Up to 633 conditions per place. [2021-11-19 05:10:46,755 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 231 selfloop transitions, 194 changer transitions 21/485 dead transitions. [2021-11-19 05:10:46,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 485 transitions, 6874 flow [2021-11-19 05:10:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:10:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-19 05:10:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2311 transitions. [2021-11-19 05:10:46,757 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558752417794971 [2021-11-19 05:10:46,757 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2311 transitions. [2021-11-19 05:10:46,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2311 transitions. [2021-11-19 05:10:46,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:46,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2311 transitions. [2021-11-19 05:10:46,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.52272727272727) internal successors, (2311), 44 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:46,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:46,761 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:46,762 INFO L186 Difference]: Start difference. First operand has 420 places, 437 transitions, 5221 flow. Second operand 44 states and 2311 transitions. [2021-11-19 05:10:46,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 485 transitions, 6874 flow [2021-11-19 05:10:46,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 485 transitions, 6600 flow, removed 23 selfloop flow, removed 31 redundant places. [2021-11-19 05:10:46,885 INFO L242 Difference]: Finished difference. Result has 434 places, 448 transitions, 5728 flow [2021-11-19 05:10:46,886 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5728, PETRI_PLACES=434, PETRI_TRANSITIONS=448} [2021-11-19 05:10:46,886 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 346 predicate places. [2021-11-19 05:10:46,886 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 448 transitions, 5728 flow [2021-11-19 05:10:46,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:46,886 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:46,887 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:46,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-11-19 05:10:46,887 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1283101822, now seen corresponding path program 112 times [2021-11-19 05:10:46,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:46,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352594358] [2021-11-19 05:10:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:46,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:47,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:47,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352594358] [2021-11-19 05:10:47,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352594358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:47,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:47,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:10:47,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469380221] [2021-11-19 05:10:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:47,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:10:47,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:10:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:10:47,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:47,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 448 transitions, 5728 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:47,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:47,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:47,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:49,724 INFO L129 PetriNetUnfolder]: 354/1133 cut-off events. [2021-11-19 05:10:49,724 INFO L130 PetriNetUnfolder]: For 16521/16521 co-relation queries the response was YES. [2021-11-19 05:10:49,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8028 conditions, 1133 events. 354/1133 cut-off events. For 16521/16521 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7129 event pairs, 52 based on Foata normal form. 1/1132 useless extension candidates. Maximal degree in co-relation 7883. Up to 677 conditions per place. [2021-11-19 05:10:49,741 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 257 selfloop transitions, 156 changer transitions 27/479 dead transitions. [2021-11-19 05:10:49,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 479 transitions, 6940 flow [2021-11-19 05:10:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:10:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-19 05:10:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2152 transitions. [2021-11-19 05:10:49,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5583809029579657 [2021-11-19 05:10:49,744 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2152 transitions. [2021-11-19 05:10:49,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2152 transitions. [2021-11-19 05:10:49,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:49,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2152 transitions. [2021-11-19 05:10:49,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.48780487804878) internal successors, (2152), 41 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:49,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:49,749 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:49,749 INFO L186 Difference]: Start difference. First operand has 434 places, 448 transitions, 5728 flow. Second operand 41 states and 2152 transitions. [2021-11-19 05:10:49,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 479 transitions, 6940 flow [2021-11-19 05:10:49,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 479 transitions, 6502 flow, removed 111 selfloop flow, removed 33 redundant places. [2021-11-19 05:10:49,911 INFO L242 Difference]: Finished difference. Result has 442 places, 440 transitions, 5665 flow [2021-11-19 05:10:49,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5665, PETRI_PLACES=442, PETRI_TRANSITIONS=440} [2021-11-19 05:10:49,911 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 354 predicate places. [2021-11-19 05:10:49,912 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 440 transitions, 5665 flow [2021-11-19 05:10:49,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:49,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:49,912 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:49,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-11-19 05:10:49,912 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash 915517126, now seen corresponding path program 113 times [2021-11-19 05:10:49,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:49,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139531982] [2021-11-19 05:10:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:49,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:50,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:50,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139531982] [2021-11-19 05:10:50,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139531982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:50,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:50,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:10:50,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924684487] [2021-11-19 05:10:50,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:50,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:10:50,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:50,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:10:50,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:10:50,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:50,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 440 transitions, 5665 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:50,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:50,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:50,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:52,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:10:53,842 INFO L129 PetriNetUnfolder]: 351/1142 cut-off events. [2021-11-19 05:10:53,843 INFO L130 PetriNetUnfolder]: For 15760/15760 co-relation queries the response was YES. [2021-11-19 05:10:53,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8006 conditions, 1142 events. 351/1142 cut-off events. For 15760/15760 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7207 event pairs, 38 based on Foata normal form. 1/1141 useless extension candidates. Maximal degree in co-relation 7860. Up to 689 conditions per place. [2021-11-19 05:10:53,861 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 290 selfloop transitions, 135 changer transitions 32/496 dead transitions. [2021-11-19 05:10:53,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 496 transitions, 7353 flow [2021-11-19 05:10:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:10:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:10:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1748 transitions. [2021-11-19 05:10:53,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635074145712443 [2021-11-19 05:10:53,863 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1748 transitions. [2021-11-19 05:10:53,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1748 transitions. [2021-11-19 05:10:53,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:53,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1748 transitions. [2021-11-19 05:10:53,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.96969696969697) internal successors, (1748), 33 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:53,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:53,867 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:53,867 INFO L186 Difference]: Start difference. First operand has 442 places, 440 transitions, 5665 flow. Second operand 33 states and 1748 transitions. [2021-11-19 05:10:53,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 496 transitions, 7353 flow [2021-11-19 05:10:54,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 496 transitions, 6854 flow, removed 28 selfloop flow, removed 42 redundant places. [2021-11-19 05:10:54,016 INFO L242 Difference]: Finished difference. Result has 428 places, 446 transitions, 5635 flow [2021-11-19 05:10:54,017 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5635, PETRI_PLACES=428, PETRI_TRANSITIONS=446} [2021-11-19 05:10:54,017 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 340 predicate places. [2021-11-19 05:10:54,017 INFO L470 AbstractCegarLoop]: Abstraction has has 428 places, 446 transitions, 5635 flow [2021-11-19 05:10:54,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:54,018 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:54,018 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:54,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-11-19 05:10:54,018 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash 948382796, now seen corresponding path program 114 times [2021-11-19 05:10:54,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:54,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552298464] [2021-11-19 05:10:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:54,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:54,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552298464] [2021-11-19 05:10:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552298464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:54,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:54,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:10:54,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950876381] [2021-11-19 05:10:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:10:54,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:10:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:10:54,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:54,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 446 transitions, 5635 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:54,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:54,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:54,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:56,471 INFO L129 PetriNetUnfolder]: 344/1092 cut-off events. [2021-11-19 05:10:56,471 INFO L130 PetriNetUnfolder]: For 15356/15356 co-relation queries the response was YES. [2021-11-19 05:10:56,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7713 conditions, 1092 events. 344/1092 cut-off events. For 15356/15356 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6645 event pairs, 50 based on Foata normal form. 1/1091 useless extension candidates. Maximal degree in co-relation 7570. Up to 688 conditions per place. [2021-11-19 05:10:56,546 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 299 selfloop transitions, 135 changer transitions 17/490 dead transitions. [2021-11-19 05:10:56,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 490 transitions, 7243 flow [2021-11-19 05:10:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:10:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:10:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1797 transitions. [2021-11-19 05:10:56,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5622653316645807 [2021-11-19 05:10:56,549 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1797 transitions. [2021-11-19 05:10:56,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1797 transitions. [2021-11-19 05:10:56,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:56,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1797 transitions. [2021-11-19 05:10:56,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.85294117647059) internal successors, (1797), 34 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:56,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:56,553 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:56,553 INFO L186 Difference]: Start difference. First operand has 428 places, 446 transitions, 5635 flow. Second operand 34 states and 1797 transitions. [2021-11-19 05:10:56,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 490 transitions, 7243 flow [2021-11-19 05:10:56,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 490 transitions, 6791 flow, removed 118 selfloop flow, removed 31 redundant places. [2021-11-19 05:10:56,716 INFO L242 Difference]: Finished difference. Result has 432 places, 458 transitions, 5885 flow [2021-11-19 05:10:56,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5885, PETRI_PLACES=432, PETRI_TRANSITIONS=458} [2021-11-19 05:10:56,717 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 344 predicate places. [2021-11-19 05:10:56,717 INFO L470 AbstractCegarLoop]: Abstraction has has 432 places, 458 transitions, 5885 flow [2021-11-19 05:10:56,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:56,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:56,718 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:56,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-11-19 05:10:56,719 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1066873238, now seen corresponding path program 115 times [2021-11-19 05:10:56,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:56,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218110633] [2021-11-19 05:10:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:56,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:10:57,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:57,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218110633] [2021-11-19 05:10:57,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218110633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:10:57,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:10:57,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:10:57,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812974815] [2021-11-19 05:10:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:10:57,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:10:57,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:10:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:10:57,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:10:57,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 458 transitions, 5885 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:57,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:10:57,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:10:57,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:10:59,700 INFO L129 PetriNetUnfolder]: 344/1085 cut-off events. [2021-11-19 05:10:59,700 INFO L130 PetriNetUnfolder]: For 14178/14178 co-relation queries the response was YES. [2021-11-19 05:10:59,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7665 conditions, 1085 events. 344/1085 cut-off events. For 14178/14178 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6593 event pairs, 52 based on Foata normal form. 1/1084 useless extension candidates. Maximal degree in co-relation 7523. Up to 628 conditions per place. [2021-11-19 05:10:59,723 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 259 selfloop transitions, 175 changer transitions 24/497 dead transitions. [2021-11-19 05:10:59,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 497 transitions, 7404 flow [2021-11-19 05:10:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:10:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:10:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2001 transitions. [2021-11-19 05:10:59,726 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5601903695408734 [2021-11-19 05:10:59,727 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2001 transitions. [2021-11-19 05:10:59,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2001 transitions. [2021-11-19 05:10:59,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:10:59,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2001 transitions. [2021-11-19 05:10:59,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.6578947368421) internal successors, (2001), 38 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:59,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:59,733 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:59,734 INFO L186 Difference]: Start difference. First operand has 432 places, 458 transitions, 5885 flow. Second operand 38 states and 2001 transitions. [2021-11-19 05:10:59,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 497 transitions, 7404 flow [2021-11-19 05:10:59,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 497 transitions, 7109 flow, removed 71 selfloop flow, removed 28 redundant places. [2021-11-19 05:10:59,900 INFO L242 Difference]: Finished difference. Result has 443 places, 456 transitions, 6118 flow [2021-11-19 05:10:59,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5612, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6118, PETRI_PLACES=443, PETRI_TRANSITIONS=456} [2021-11-19 05:10:59,901 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 355 predicate places. [2021-11-19 05:10:59,901 INFO L470 AbstractCegarLoop]: Abstraction has has 443 places, 456 transitions, 6118 flow [2021-11-19 05:10:59,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:10:59,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:10:59,902 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:59,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-11-19 05:10:59,902 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:10:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1136450634, now seen corresponding path program 116 times [2021-11-19 05:10:59,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:59,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090594849] [2021-11-19 05:10:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:59,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:00,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:00,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090594849] [2021-11-19 05:11:00,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090594849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:00,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:00,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:11:00,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146591524] [2021-11-19 05:11:00,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:00,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:11:00,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:11:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:11:00,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:00,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 456 transitions, 6118 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:00,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:00,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:00,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:03,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:11:05,033 INFO L129 PetriNetUnfolder]: 346/1074 cut-off events. [2021-11-19 05:11:05,033 INFO L130 PetriNetUnfolder]: For 14962/14962 co-relation queries the response was YES. [2021-11-19 05:11:05,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7795 conditions, 1074 events. 346/1074 cut-off events. For 14962/14962 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6494 event pairs, 39 based on Foata normal form. 1/1073 useless extension candidates. Maximal degree in co-relation 7650. Up to 723 conditions per place. [2021-11-19 05:11:05,058 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 332 selfloop transitions, 98 changer transitions 22/491 dead transitions. [2021-11-19 05:11:05,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 491 transitions, 7461 flow [2021-11-19 05:11:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:11:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:11:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1896 transitions. [2021-11-19 05:11:05,060 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2021-11-19 05:11:05,060 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1896 transitions. [2021-11-19 05:11:05,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1896 transitions. [2021-11-19 05:11:05,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:05,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1896 transitions. [2021-11-19 05:11:05,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.666666666666664) internal successors, (1896), 36 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:05,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:05,065 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:05,065 INFO L186 Difference]: Start difference. First operand has 443 places, 456 transitions, 6118 flow. Second operand 36 states and 1896 transitions. [2021-11-19 05:11:05,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 491 transitions, 7461 flow [2021-11-19 05:11:05,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 491 transitions, 7111 flow, removed 62 selfloop flow, removed 34 redundant places. [2021-11-19 05:11:05,315 INFO L242 Difference]: Finished difference. Result has 444 places, 457 transitions, 6096 flow [2021-11-19 05:11:05,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6096, PETRI_PLACES=444, PETRI_TRANSITIONS=457} [2021-11-19 05:11:05,316 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 356 predicate places. [2021-11-19 05:11:05,316 INFO L470 AbstractCegarLoop]: Abstraction has has 444 places, 457 transitions, 6096 flow [2021-11-19 05:11:05,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:05,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:05,317 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:05,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-11-19 05:11:05,317 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1057909742, now seen corresponding path program 117 times [2021-11-19 05:11:05,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:05,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699411713] [2021-11-19 05:11:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:05,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:05,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:05,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699411713] [2021-11-19 05:11:05,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699411713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:05,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:05,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:11:05,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153097108] [2021-11-19 05:11:05,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:05,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:11:05,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:05,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:11:05,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:11:05,795 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:05,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 457 transitions, 6096 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:05,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:05,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:05,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:08,492 INFO L129 PetriNetUnfolder]: 346/1089 cut-off events. [2021-11-19 05:11:08,493 INFO L130 PetriNetUnfolder]: For 14597/14597 co-relation queries the response was YES. [2021-11-19 05:11:08,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 1089 events. 346/1089 cut-off events. For 14597/14597 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6620 event pairs, 40 based on Foata normal form. 1/1088 useless extension candidates. Maximal degree in co-relation 7675. Up to 685 conditions per place. [2021-11-19 05:11:08,514 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 302 selfloop transitions, 136 changer transitions 19/496 dead transitions. [2021-11-19 05:11:08,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 496 transitions, 7510 flow [2021-11-19 05:11:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:11:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:11:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1850 transitions. [2021-11-19 05:11:08,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5623100303951368 [2021-11-19 05:11:08,516 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1850 transitions. [2021-11-19 05:11:08,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1850 transitions. [2021-11-19 05:11:08,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:08,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1850 transitions. [2021-11-19 05:11:08,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.857142857142854) internal successors, (1850), 35 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:08,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:08,521 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:08,521 INFO L186 Difference]: Start difference. First operand has 444 places, 457 transitions, 6096 flow. Second operand 35 states and 1850 transitions. [2021-11-19 05:11:08,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 496 transitions, 7510 flow [2021-11-19 05:11:08,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 496 transitions, 7249 flow, removed 44 selfloop flow, removed 32 redundant places. [2021-11-19 05:11:08,705 INFO L242 Difference]: Finished difference. Result has 445 places, 462 transitions, 6316 flow [2021-11-19 05:11:08,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6316, PETRI_PLACES=445, PETRI_TRANSITIONS=462} [2021-11-19 05:11:08,706 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 357 predicate places. [2021-11-19 05:11:08,706 INFO L470 AbstractCegarLoop]: Abstraction has has 445 places, 462 transitions, 6316 flow [2021-11-19 05:11:08,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:08,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:08,707 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:08,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-11-19 05:11:08,707 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1652830902, now seen corresponding path program 118 times [2021-11-19 05:11:08,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:08,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169986155] [2021-11-19 05:11:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:08,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:09,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:09,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169986155] [2021-11-19 05:11:09,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169986155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:09,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:09,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:09,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896561760] [2021-11-19 05:11:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:09,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:09,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:09,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:09,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 462 transitions, 6316 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:09,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:09,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:09,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:11,529 INFO L129 PetriNetUnfolder]: 349/1101 cut-off events. [2021-11-19 05:11:11,529 INFO L130 PetriNetUnfolder]: For 14527/14527 co-relation queries the response was YES. [2021-11-19 05:11:11,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8028 conditions, 1101 events. 349/1101 cut-off events. For 14527/14527 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6756 event pairs, 55 based on Foata normal form. 1/1100 useless extension candidates. Maximal degree in co-relation 7882. Up to 680 conditions per place. [2021-11-19 05:11:11,551 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 313 selfloop transitions, 146 changer transitions 16/514 dead transitions. [2021-11-19 05:11:11,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 514 transitions, 8062 flow [2021-11-19 05:11:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:11:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:11:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1946 transitions. [2021-11-19 05:11:11,553 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595169637722829 [2021-11-19 05:11:11,553 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1946 transitions. [2021-11-19 05:11:11,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1946 transitions. [2021-11-19 05:11:11,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:11,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1946 transitions. [2021-11-19 05:11:11,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.5945945945946) internal successors, (1946), 37 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:11,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:11,558 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:11,559 INFO L186 Difference]: Start difference. First operand has 445 places, 462 transitions, 6316 flow. Second operand 37 states and 1946 transitions. [2021-11-19 05:11:11,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 514 transitions, 8062 flow [2021-11-19 05:11:11,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 514 transitions, 7822 flow, removed 36 selfloop flow, removed 30 redundant places. [2021-11-19 05:11:11,757 INFO L242 Difference]: Finished difference. Result has 453 places, 477 transitions, 6725 flow [2021-11-19 05:11:11,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6725, PETRI_PLACES=453, PETRI_TRANSITIONS=477} [2021-11-19 05:11:11,758 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 365 predicate places. [2021-11-19 05:11:11,758 INFO L470 AbstractCegarLoop]: Abstraction has has 453 places, 477 transitions, 6725 flow [2021-11-19 05:11:11,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:11,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:11,759 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, 1, 1] [2021-11-19 05:11:11,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-11-19 05:11:11,759 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:11,760 INFO L85 PathProgramCache]: Analyzing trace with hash -382653860, now seen corresponding path program 119 times [2021-11-19 05:11:11,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:11,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990134184] [2021-11-19 05:11:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:11,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:12,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:12,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990134184] [2021-11-19 05:11:12,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990134184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:12,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:12,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:11:12,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005400426] [2021-11-19 05:11:12,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:12,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:11:12,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:11:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:11:12,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:12,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 477 transitions, 6725 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:12,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:12,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:12,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:14,938 INFO L129 PetriNetUnfolder]: 349/1102 cut-off events. [2021-11-19 05:11:14,938 INFO L130 PetriNetUnfolder]: For 15804/15804 co-relation queries the response was YES. [2021-11-19 05:11:14,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8208 conditions, 1102 events. 349/1102 cut-off events. For 15804/15804 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6769 event pairs, 42 based on Foata normal form. 1/1101 useless extension candidates. Maximal degree in co-relation 8061. Up to 680 conditions per place. [2021-11-19 05:11:14,959 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 312 selfloop transitions, 149 changer transitions 17/517 dead transitions. [2021-11-19 05:11:14,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 517 transitions, 8339 flow [2021-11-19 05:11:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:11:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:11:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1995 transitions. [2021-11-19 05:11:14,961 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-11-19 05:11:14,961 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1995 transitions. [2021-11-19 05:11:14,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1995 transitions. [2021-11-19 05:11:14,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:14,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1995 transitions. [2021-11-19 05:11:14,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.5) internal successors, (1995), 38 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:14,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:14,965 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:14,965 INFO L186 Difference]: Start difference. First operand has 453 places, 477 transitions, 6725 flow. Second operand 38 states and 1995 transitions. [2021-11-19 05:11:14,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 517 transitions, 8339 flow [2021-11-19 05:11:15,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 517 transitions, 8091 flow, removed 43 selfloop flow, removed 29 redundant places. [2021-11-19 05:11:15,137 INFO L242 Difference]: Finished difference. Result has 463 places, 479 transitions, 6947 flow [2021-11-19 05:11:15,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6947, PETRI_PLACES=463, PETRI_TRANSITIONS=479} [2021-11-19 05:11:15,137 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 375 predicate places. [2021-11-19 05:11:15,137 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 479 transitions, 6947 flow [2021-11-19 05:11:15,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:15,138 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:15,138 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:15,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-11-19 05:11:15,138 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash 828581916, now seen corresponding path program 120 times [2021-11-19 05:11:15,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:15,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306976977] [2021-11-19 05:11:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:15,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:15,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:15,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306976977] [2021-11-19 05:11:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306976977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:15,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:15,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:15,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235330107] [2021-11-19 05:11:15,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:15,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:15,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:15,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:15,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 479 transitions, 6947 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:15,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:15,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:15,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:17,838 INFO L129 PetriNetUnfolder]: 350/1106 cut-off events. [2021-11-19 05:11:17,838 INFO L130 PetriNetUnfolder]: For 16440/16440 co-relation queries the response was YES. [2021-11-19 05:11:17,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8322 conditions, 1106 events. 350/1106 cut-off events. For 16440/16440 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6765 event pairs, 42 based on Foata normal form. 1/1105 useless extension candidates. Maximal degree in co-relation 8172. Up to 683 conditions per place. [2021-11-19 05:11:17,857 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 300 selfloop transitions, 155 changer transitions 21/515 dead transitions. [2021-11-19 05:11:17,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 515 transitions, 8313 flow [2021-11-19 05:11:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:11:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-19 05:11:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2102 transitions. [2021-11-19 05:11:17,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5590425531914893 [2021-11-19 05:11:17,859 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2102 transitions. [2021-11-19 05:11:17,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2102 transitions. [2021-11-19 05:11:17,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:17,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2102 transitions. [2021-11-19 05:11:17,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.55) internal successors, (2102), 40 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:17,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:17,864 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:17,864 INFO L186 Difference]: Start difference. First operand has 463 places, 479 transitions, 6947 flow. Second operand 40 states and 2102 transitions. [2021-11-19 05:11:17,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 515 transitions, 8313 flow [2021-11-19 05:11:18,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 515 transitions, 8026 flow, removed 45 selfloop flow, removed 33 redundant places. [2021-11-19 05:11:18,068 INFO L242 Difference]: Finished difference. Result has 471 places, 480 transitions, 7126 flow [2021-11-19 05:11:18,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6683, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=7126, PETRI_PLACES=471, PETRI_TRANSITIONS=480} [2021-11-19 05:11:18,069 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-19 05:11:18,069 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 480 transitions, 7126 flow [2021-11-19 05:11:18,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:18,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:18,069 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:18,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-11-19 05:11:18,070 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1017670730, now seen corresponding path program 121 times [2021-11-19 05:11:18,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:18,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889234150] [2021-11-19 05:11:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:18,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:18,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:18,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889234150] [2021-11-19 05:11:18,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889234150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:18,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:18,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:11:18,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022980854] [2021-11-19 05:11:18,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:18,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:11:18,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:11:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:11:18,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:18,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 480 transitions, 7126 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:18,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:18,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:18,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:20,811 INFO L129 PetriNetUnfolder]: 347/1099 cut-off events. [2021-11-19 05:11:20,811 INFO L130 PetriNetUnfolder]: For 15985/15985 co-relation queries the response was YES. [2021-11-19 05:11:20,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 1099 events. 347/1099 cut-off events. For 15985/15985 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6762 event pairs, 42 based on Foata normal form. 1/1098 useless extension candidates. Maximal degree in co-relation 8264. Up to 667 conditions per place. [2021-11-19 05:11:20,835 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 299 selfloop transitions, 156 changer transitions 27/521 dead transitions. [2021-11-19 05:11:20,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 521 transitions, 8650 flow [2021-11-19 05:11:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:11:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:11:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1899 transitions. [2021-11-19 05:11:20,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5611702127659575 [2021-11-19 05:11:20,837 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1899 transitions. [2021-11-19 05:11:20,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1899 transitions. [2021-11-19 05:11:20,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:20,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1899 transitions. [2021-11-19 05:11:20,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.75) internal successors, (1899), 36 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:20,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:20,841 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:20,841 INFO L186 Difference]: Start difference. First operand has 471 places, 480 transitions, 7126 flow. Second operand 36 states and 1899 transitions. [2021-11-19 05:11:20,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 521 transitions, 8650 flow [2021-11-19 05:11:21,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 521 transitions, 8219 flow, removed 43 selfloop flow, removed 36 redundant places. [2021-11-19 05:11:21,052 INFO L242 Difference]: Finished difference. Result has 471 places, 479 transitions, 7094 flow [2021-11-19 05:11:21,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6721, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7094, PETRI_PLACES=471, PETRI_TRANSITIONS=479} [2021-11-19 05:11:21,053 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-19 05:11:21,053 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 479 transitions, 7094 flow [2021-11-19 05:11:21,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:21,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:21,054 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:21,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-11-19 05:11:21,054 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash 253358452, now seen corresponding path program 122 times [2021-11-19 05:11:21,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:21,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369629584] [2021-11-19 05:11:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:21,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:21,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:21,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369629584] [2021-11-19 05:11:21,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369629584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:21,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:21,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:21,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364505538] [2021-11-19 05:11:21,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:21,578 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:21,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 479 transitions, 7094 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:21,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:21,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:21,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:23,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:11:24,911 INFO L129 PetriNetUnfolder]: 348/1122 cut-off events. [2021-11-19 05:11:24,912 INFO L130 PetriNetUnfolder]: For 15264/15264 co-relation queries the response was YES. [2021-11-19 05:11:24,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8405 conditions, 1122 events. 348/1122 cut-off events. For 15264/15264 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6972 event pairs, 57 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 8251. Up to 672 conditions per place. [2021-11-19 05:11:24,935 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 294 selfloop transitions, 173 changer transitions 17/523 dead transitions. [2021-11-19 05:11:24,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 523 transitions, 8558 flow [2021-11-19 05:11:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:11:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:11:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2051 transitions. [2021-11-19 05:11:24,937 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5594653573376978 [2021-11-19 05:11:24,937 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2051 transitions. [2021-11-19 05:11:24,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2051 transitions. [2021-11-19 05:11:24,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:24,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2051 transitions. [2021-11-19 05:11:24,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.58974358974359) internal successors, (2051), 39 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:24,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:24,942 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:24,942 INFO L186 Difference]: Start difference. First operand has 471 places, 479 transitions, 7094 flow. Second operand 39 states and 2051 transitions. [2021-11-19 05:11:24,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 523 transitions, 8558 flow [2021-11-19 05:11:25,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 523 transitions, 8192 flow, removed 63 selfloop flow, removed 30 redundant places. [2021-11-19 05:11:25,164 INFO L242 Difference]: Finished difference. Result has 482 places, 490 transitions, 7387 flow [2021-11-19 05:11:25,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6745, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=7387, PETRI_PLACES=482, PETRI_TRANSITIONS=490} [2021-11-19 05:11:25,165 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 394 predicate places. [2021-11-19 05:11:25,165 INFO L470 AbstractCegarLoop]: Abstraction has has 482 places, 490 transitions, 7387 flow [2021-11-19 05:11:25,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:25,165 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:25,166 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, 1, 1] [2021-11-19 05:11:25,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-11-19 05:11:25,166 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2048100310, now seen corresponding path program 123 times [2021-11-19 05:11:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:25,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963140988] [2021-11-19 05:11:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:25,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:25,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:25,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963140988] [2021-11-19 05:11:25,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963140988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:25,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:25,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:25,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278998067] [2021-11-19 05:11:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:25,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:25,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:25,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:25,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 490 transitions, 7387 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:25,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:25,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:25,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:27,770 INFO L129 PetriNetUnfolder]: 348/1110 cut-off events. [2021-11-19 05:11:27,771 INFO L130 PetriNetUnfolder]: For 16608/16608 co-relation queries the response was YES. [2021-11-19 05:11:27,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8568 conditions, 1110 events. 348/1110 cut-off events. For 16608/16608 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6841 event pairs, 41 based on Foata normal form. 1/1109 useless extension candidates. Maximal degree in co-relation 8410. Up to 748 conditions per place. [2021-11-19 05:11:27,794 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 361 selfloop transitions, 99 changer transitions 21/520 dead transitions. [2021-11-19 05:11:27,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 520 transitions, 8730 flow [2021-11-19 05:11:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:11:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:11:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2040 transitions. [2021-11-19 05:11:27,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5564648117839607 [2021-11-19 05:11:27,796 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2040 transitions. [2021-11-19 05:11:27,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2040 transitions. [2021-11-19 05:11:27,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:27,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2040 transitions. [2021-11-19 05:11:27,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.30769230769231) internal successors, (2040), 39 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:27,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:27,801 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:27,801 INFO L186 Difference]: Start difference. First operand has 482 places, 490 transitions, 7387 flow. Second operand 39 states and 2040 transitions. [2021-11-19 05:11:27,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 520 transitions, 8730 flow [2021-11-19 05:11:28,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 520 transitions, 8353 flow, removed 54 selfloop flow, removed 32 redundant places. [2021-11-19 05:11:28,031 INFO L242 Difference]: Finished difference. Result has 489 places, 489 transitions, 7321 flow [2021-11-19 05:11:28,031 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=7321, PETRI_PLACES=489, PETRI_TRANSITIONS=489} [2021-11-19 05:11:28,032 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 401 predicate places. [2021-11-19 05:11:28,032 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 489 transitions, 7321 flow [2021-11-19 05:11:28,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:28,033 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:28,033 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:28,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-11-19 05:11:28,033 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1534296460, now seen corresponding path program 124 times [2021-11-19 05:11:28,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:28,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030903707] [2021-11-19 05:11:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:28,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:28,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:28,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030903707] [2021-11-19 05:11:28,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030903707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:28,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:28,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:28,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511942095] [2021-11-19 05:11:28,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:28,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:28,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:28,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:28,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:28,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 489 transitions, 7321 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:28,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:28,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:28,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:31,303 INFO L129 PetriNetUnfolder]: 340/1091 cut-off events. [2021-11-19 05:11:31,303 INFO L130 PetriNetUnfolder]: For 14947/14947 co-relation queries the response was YES. [2021-11-19 05:11:31,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8353 conditions, 1091 events. 340/1091 cut-off events. For 14947/14947 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6738 event pairs, 52 based on Foata normal form. 1/1091 useless extension candidates. Maximal degree in co-relation 8191. Up to 743 conditions per place. [2021-11-19 05:11:31,325 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 360 selfloop transitions, 77 changer transitions 32/508 dead transitions. [2021-11-19 05:11:31,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 508 transitions, 8369 flow [2021-11-19 05:11:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:11:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:11:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1884 transitions. [2021-11-19 05:11:31,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2021-11-19 05:11:31,327 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1884 transitions. [2021-11-19 05:11:31,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1884 transitions. [2021-11-19 05:11:31,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:31,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1884 transitions. [2021-11-19 05:11:31,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.333333333333336) internal successors, (1884), 36 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:31,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:31,331 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:31,331 INFO L186 Difference]: Start difference. First operand has 489 places, 489 transitions, 7321 flow. Second operand 36 states and 1884 transitions. [2021-11-19 05:11:31,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 508 transitions, 8369 flow [2021-11-19 05:11:31,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 508 transitions, 7964 flow, removed 90 selfloop flow, removed 36 redundant places. [2021-11-19 05:11:31,538 INFO L242 Difference]: Finished difference. Result has 486 places, 467 transitions, 6764 flow [2021-11-19 05:11:31,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6924, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6764, PETRI_PLACES=486, PETRI_TRANSITIONS=467} [2021-11-19 05:11:31,539 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 398 predicate places. [2021-11-19 05:11:31,539 INFO L470 AbstractCegarLoop]: Abstraction has has 486 places, 467 transitions, 6764 flow [2021-11-19 05:11:31,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:31,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:31,539 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:31,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-11-19 05:11:31,540 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash -590081150, now seen corresponding path program 125 times [2021-11-19 05:11:31,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:31,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662531267] [2021-11-19 05:11:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:31,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:32,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:32,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662531267] [2021-11-19 05:11:32,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662531267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:32,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:32,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:32,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570985935] [2021-11-19 05:11:32,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:32,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:32,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:32,017 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:32,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 467 transitions, 6764 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:32,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:32,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:32,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:34,163 INFO L129 PetriNetUnfolder]: 332/1062 cut-off events. [2021-11-19 05:11:34,163 INFO L130 PetriNetUnfolder]: For 13832/13832 co-relation queries the response was YES. [2021-11-19 05:11:34,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7964 conditions, 1062 events. 332/1062 cut-off events. For 13832/13832 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6463 event pairs, 56 based on Foata normal form. 1/1062 useless extension candidates. Maximal degree in co-relation 7803. Up to 654 conditions per place. [2021-11-19 05:11:34,184 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 292 selfloop transitions, 99 changer transitions 59/489 dead transitions. [2021-11-19 05:11:34,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 489 transitions, 7795 flow [2021-11-19 05:11:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:11:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:11:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1944 transitions. [2021-11-19 05:11:34,187 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5589419206440484 [2021-11-19 05:11:34,187 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1944 transitions. [2021-11-19 05:11:34,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1944 transitions. [2021-11-19 05:11:34,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:34,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1944 transitions. [2021-11-19 05:11:34,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.54054054054054) internal successors, (1944), 37 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:34,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:34,191 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:34,191 INFO L186 Difference]: Start difference. First operand has 486 places, 467 transitions, 6764 flow. Second operand 37 states and 1944 transitions. [2021-11-19 05:11:34,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 489 transitions, 7795 flow [2021-11-19 05:11:34,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 489 transitions, 7521 flow, removed 29 selfloop flow, removed 37 redundant places. [2021-11-19 05:11:34,381 INFO L242 Difference]: Finished difference. Result has 471 places, 417 transitions, 5754 flow [2021-11-19 05:11:34,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6500, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5754, PETRI_PLACES=471, PETRI_TRANSITIONS=417} [2021-11-19 05:11:34,382 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-19 05:11:34,382 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 417 transitions, 5754 flow [2021-11-19 05:11:34,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:34,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:34,382 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:34,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-11-19 05:11:34,382 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash 34358692, now seen corresponding path program 126 times [2021-11-19 05:11:34,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:34,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998135121] [2021-11-19 05:11:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:34,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:34,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:34,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998135121] [2021-11-19 05:11:34,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998135121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:34,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:34,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:11:34,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613021952] [2021-11-19 05:11:34,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:34,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:11:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:11:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:11:34,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:34,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 417 transitions, 5754 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:34,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:34,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:34,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:36,755 INFO L129 PetriNetUnfolder]: 315/1001 cut-off events. [2021-11-19 05:11:36,756 INFO L130 PetriNetUnfolder]: For 13457/13457 co-relation queries the response was YES. [2021-11-19 05:11:36,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7419 conditions, 1001 events. 315/1001 cut-off events. For 13457/13457 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5856 event pairs, 57 based on Foata normal form. 1/1000 useless extension candidates. Maximal degree in co-relation 7265. Up to 647 conditions per place. [2021-11-19 05:11:36,776 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 281 selfloop transitions, 84 changer transitions 48/452 dead transitions. [2021-11-19 05:11:36,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 452 transitions, 6971 flow [2021-11-19 05:11:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:11:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:11:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1995 transitions. [2021-11-19 05:11:36,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-11-19 05:11:36,778 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1995 transitions. [2021-11-19 05:11:36,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1995 transitions. [2021-11-19 05:11:36,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:36,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1995 transitions. [2021-11-19 05:11:36,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.5) internal successors, (1995), 38 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:36,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:36,783 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:36,783 INFO L186 Difference]: Start difference. First operand has 471 places, 417 transitions, 5754 flow. Second operand 38 states and 1995 transitions. [2021-11-19 05:11:36,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 452 transitions, 6971 flow [2021-11-19 05:11:36,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 452 transitions, 6388 flow, removed 131 selfloop flow, removed 48 redundant places. [2021-11-19 05:11:36,971 INFO L242 Difference]: Finished difference. Result has 444 places, 394 transitions, 5038 flow [2021-11-19 05:11:36,972 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5038, PETRI_PLACES=444, PETRI_TRANSITIONS=394} [2021-11-19 05:11:36,972 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 356 predicate places. [2021-11-19 05:11:36,972 INFO L470 AbstractCegarLoop]: Abstraction has has 444 places, 394 transitions, 5038 flow [2021-11-19 05:11:36,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:36,972 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:36,972 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:36,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-11-19 05:11:36,973 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash 923783762, now seen corresponding path program 127 times [2021-11-19 05:11:36,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:36,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099245897] [2021-11-19 05:11:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:36,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:37,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:37,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099245897] [2021-11-19 05:11:37,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099245897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:37,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:37,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:37,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963560883] [2021-11-19 05:11:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:37,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:37,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:37,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:37,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 394 transitions, 5038 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:37,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:37,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:37,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:40,650 INFO L129 PetriNetUnfolder]: 304/952 cut-off events. [2021-11-19 05:11:40,650 INFO L130 PetriNetUnfolder]: For 13557/13557 co-relation queries the response was YES. [2021-11-19 05:11:40,668 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 952 events. 304/952 cut-off events. For 13557/13557 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5407 event pairs, 40 based on Foata normal form. 1/952 useless extension candidates. Maximal degree in co-relation 6725. Up to 563 conditions per place. [2021-11-19 05:11:40,673 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 214 selfloop transitions, 135 changer transitions 36/424 dead transitions. [2021-11-19 05:11:40,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 424 transitions, 6165 flow [2021-11-19 05:11:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 05:11:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-19 05:11:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2199 transitions. [2021-11-19 05:11:40,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569908814589666 [2021-11-19 05:11:40,676 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2199 transitions. [2021-11-19 05:11:40,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2199 transitions. [2021-11-19 05:11:40,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:40,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2199 transitions. [2021-11-19 05:11:40,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.357142857142854) internal successors, (2199), 42 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:40,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:40,681 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:40,681 INFO L186 Difference]: Start difference. First operand has 444 places, 394 transitions, 5038 flow. Second operand 42 states and 2199 transitions. [2021-11-19 05:11:40,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 424 transitions, 6165 flow [2021-11-19 05:11:40,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 424 transitions, 5729 flow, removed 118 selfloop flow, removed 41 redundant places. [2021-11-19 05:11:40,833 INFO L242 Difference]: Finished difference. Result has 440 places, 378 transitions, 4785 flow [2021-11-19 05:11:40,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4785, PETRI_PLACES=440, PETRI_TRANSITIONS=378} [2021-11-19 05:11:40,834 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 352 predicate places. [2021-11-19 05:11:40,834 INFO L470 AbstractCegarLoop]: Abstraction has has 440 places, 378 transitions, 4785 flow [2021-11-19 05:11:40,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:40,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:40,834 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:40,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-11-19 05:11:40,835 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1690970946, now seen corresponding path program 128 times [2021-11-19 05:11:40,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:40,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500326261] [2021-11-19 05:11:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:40,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:41,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:41,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500326261] [2021-11-19 05:11:41,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500326261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:41,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:41,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:11:41,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74980326] [2021-11-19 05:11:41,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:41,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:11:41,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:11:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:11:41,475 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:41,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 378 transitions, 4785 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:41,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:41,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:41,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:43,184 INFO L129 PetriNetUnfolder]: 288/903 cut-off events. [2021-11-19 05:11:43,184 INFO L130 PetriNetUnfolder]: For 11054/11054 co-relation queries the response was YES. [2021-11-19 05:11:43,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 903 events. 288/903 cut-off events. For 11054/11054 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5001 event pairs, 57 based on Foata normal form. 1/902 useless extension candidates. Maximal degree in co-relation 6309. Up to 618 conditions per place. [2021-11-19 05:11:43,201 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 264 selfloop transitions, 72 changer transitions 21/396 dead transitions. [2021-11-19 05:11:43,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 396 transitions, 5591 flow [2021-11-19 05:11:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:11:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:11:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1781 transitions. [2021-11-19 05:11:43,204 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5572590738423029 [2021-11-19 05:11:43,204 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1781 transitions. [2021-11-19 05:11:43,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1781 transitions. [2021-11-19 05:11:43,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:43,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1781 transitions. [2021-11-19 05:11:43,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.38235294117647) internal successors, (1781), 34 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:43,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:43,209 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:43,209 INFO L186 Difference]: Start difference. First operand has 440 places, 378 transitions, 4785 flow. Second operand 34 states and 1781 transitions. [2021-11-19 05:11:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 396 transitions, 5591 flow [2021-11-19 05:11:43,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 396 transitions, 5106 flow, removed 79 selfloop flow, removed 41 redundant places. [2021-11-19 05:11:43,359 INFO L242 Difference]: Finished difference. Result has 426 places, 366 transitions, 4378 flow [2021-11-19 05:11:43,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4378, PETRI_PLACES=426, PETRI_TRANSITIONS=366} [2021-11-19 05:11:43,360 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 338 predicate places. [2021-11-19 05:11:43,360 INFO L470 AbstractCegarLoop]: Abstraction has has 426 places, 366 transitions, 4378 flow [2021-11-19 05:11:43,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:43,360 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:43,361 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:43,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-11-19 05:11:43,361 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash 761579728, now seen corresponding path program 129 times [2021-11-19 05:11:43,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:43,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471772565] [2021-11-19 05:11:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:43,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:43,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:43,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471772565] [2021-11-19 05:11:43,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471772565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:43,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:43,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:11:43,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748587821] [2021-11-19 05:11:43,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:43,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:11:43,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:11:43,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:11:43,872 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:43,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 366 transitions, 4378 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:43,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:43,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:43,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:46,022 INFO L129 PetriNetUnfolder]: 286/886 cut-off events. [2021-11-19 05:11:46,022 INFO L130 PetriNetUnfolder]: For 10989/10989 co-relation queries the response was YES. [2021-11-19 05:11:46,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6224 conditions, 886 events. 286/886 cut-off events. For 10989/10989 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4835 event pairs, 42 based on Foata normal form. 1/885 useless extension candidates. Maximal degree in co-relation 6084. Up to 601 conditions per place. [2021-11-19 05:11:46,036 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 252 selfloop transitions, 81 changer transitions 17/389 dead transitions. [2021-11-19 05:11:46,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 389 transitions, 5289 flow [2021-11-19 05:11:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:11:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:11:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1787 transitions. [2021-11-19 05:11:46,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.559136420525657 [2021-11-19 05:11:46,038 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1787 transitions. [2021-11-19 05:11:46,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1787 transitions. [2021-11-19 05:11:46,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:46,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1787 transitions. [2021-11-19 05:11:46,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.55882352941177) internal successors, (1787), 34 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:46,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:46,042 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:46,042 INFO L186 Difference]: Start difference. First operand has 426 places, 366 transitions, 4378 flow. Second operand 34 states and 1787 transitions. [2021-11-19 05:11:46,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 389 transitions, 5289 flow [2021-11-19 05:11:46,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 389 transitions, 5051 flow, removed 20 selfloop flow, removed 42 redundant places. [2021-11-19 05:11:46,166 INFO L242 Difference]: Finished difference. Result has 411 places, 362 transitions, 4271 flow [2021-11-19 05:11:46,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4271, PETRI_PLACES=411, PETRI_TRANSITIONS=362} [2021-11-19 05:11:46,166 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 323 predicate places. [2021-11-19 05:11:46,166 INFO L470 AbstractCegarLoop]: Abstraction has has 411 places, 362 transitions, 4271 flow [2021-11-19 05:11:46,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:46,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:46,167 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:46,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-11-19 05:11:46,167 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1342101962, now seen corresponding path program 130 times [2021-11-19 05:11:46,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:46,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590216108] [2021-11-19 05:11:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:46,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:46,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:46,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590216108] [2021-11-19 05:11:46,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590216108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:46,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:46,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:11:46,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414410489] [2021-11-19 05:11:46,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:46,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:11:46,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:11:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:11:46,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:46,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 362 transitions, 4271 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:46,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:46,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:46,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:48,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:11:51,847 INFO L129 PetriNetUnfolder]: 283/874 cut-off events. [2021-11-19 05:11:51,847 INFO L130 PetriNetUnfolder]: For 10541/10541 co-relation queries the response was YES. [2021-11-19 05:11:51,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6110 conditions, 874 events. 283/874 cut-off events. For 10541/10541 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4751 event pairs, 41 based on Foata normal form. 1/874 useless extension candidates. Maximal degree in co-relation 5975. Up to 606 conditions per place. [2021-11-19 05:11:51,863 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 255 selfloop transitions, 73 changer transitions 16/383 dead transitions. [2021-11-19 05:11:51,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 383 transitions, 5146 flow [2021-11-19 05:11:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:11:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:11:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1929 transitions. [2021-11-19 05:11:51,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5546290971822887 [2021-11-19 05:11:51,866 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1929 transitions. [2021-11-19 05:11:51,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1929 transitions. [2021-11-19 05:11:51,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:51,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1929 transitions. [2021-11-19 05:11:51,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.13513513513514) internal successors, (1929), 37 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:51,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:51,870 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:51,870 INFO L186 Difference]: Start difference. First operand has 411 places, 362 transitions, 4271 flow. Second operand 37 states and 1929 transitions. [2021-11-19 05:11:51,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 383 transitions, 5146 flow [2021-11-19 05:11:51,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 383 transitions, 4888 flow, removed 21 selfloop flow, removed 38 redundant places. [2021-11-19 05:11:51,987 INFO L242 Difference]: Finished difference. Result has 408 places, 357 transitions, 4166 flow [2021-11-19 05:11:51,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4029, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4166, PETRI_PLACES=408, PETRI_TRANSITIONS=357} [2021-11-19 05:11:51,988 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 320 predicate places. [2021-11-19 05:11:51,988 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 357 transitions, 4166 flow [2021-11-19 05:11:51,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:51,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:51,988 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:51,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-11-19 05:11:51,989 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1683180866, now seen corresponding path program 131 times [2021-11-19 05:11:51,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:51,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416397553] [2021-11-19 05:11:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:51,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:52,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:52,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416397553] [2021-11-19 05:11:52,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416397553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:52,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:52,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:11:52,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902392099] [2021-11-19 05:11:52,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:52,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:11:52,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:11:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:11:52,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:52,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 357 transitions, 4166 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:52,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:52,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:52,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:11:55,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:11:57,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:11:58,479 INFO L129 PetriNetUnfolder]: 279/858 cut-off events. [2021-11-19 05:11:58,479 INFO L130 PetriNetUnfolder]: For 9521/9521 co-relation queries the response was YES. [2021-11-19 05:11:58,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5984 conditions, 858 events. 279/858 cut-off events. For 9521/9521 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4620 event pairs, 56 based on Foata normal form. 1/857 useless extension candidates. Maximal degree in co-relation 5853. Up to 606 conditions per place. [2021-11-19 05:11:58,494 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 257 selfloop transitions, 58 changer transitions 22/376 dead transitions. [2021-11-19 05:11:58,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 376 transitions, 4930 flow [2021-11-19 05:11:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:11:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:11:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1821 transitions. [2021-11-19 05:11:58,496 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5534954407294833 [2021-11-19 05:11:58,496 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1821 transitions. [2021-11-19 05:11:58,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1821 transitions. [2021-11-19 05:11:58,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:11:58,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1821 transitions. [2021-11-19 05:11:58,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.02857142857143) internal successors, (1821), 35 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:58,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:58,501 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:58,501 INFO L186 Difference]: Start difference. First operand has 408 places, 357 transitions, 4166 flow. Second operand 35 states and 1821 transitions. [2021-11-19 05:11:58,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 376 transitions, 4930 flow [2021-11-19 05:11:58,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 376 transitions, 4672 flow, removed 17 selfloop flow, removed 38 redundant places. [2021-11-19 05:11:58,615 INFO L242 Difference]: Finished difference. Result has 400 places, 345 transitions, 3955 flow [2021-11-19 05:11:58,615 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3918, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3955, PETRI_PLACES=400, PETRI_TRANSITIONS=345} [2021-11-19 05:11:58,615 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 312 predicate places. [2021-11-19 05:11:58,615 INFO L470 AbstractCegarLoop]: Abstraction has has 400 places, 345 transitions, 3955 flow [2021-11-19 05:11:58,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:58,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:11:58,616 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:58,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-11-19 05:11:58,616 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:11:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1509807506, now seen corresponding path program 132 times [2021-11-19 05:11:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:58,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611412620] [2021-11-19 05:11:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:58,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:11:59,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:59,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611412620] [2021-11-19 05:11:59,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611412620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:11:59,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:11:59,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:11:59,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222946914] [2021-11-19 05:11:59,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:11:59,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:11:59,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:11:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:11:59,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:11:59,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 345 transitions, 3955 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:11:59,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:11:59,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:11:59,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:00,707 INFO L129 PetriNetUnfolder]: 276/839 cut-off events. [2021-11-19 05:12:00,708 INFO L130 PetriNetUnfolder]: For 8857/8857 co-relation queries the response was YES. [2021-11-19 05:12:00,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5723 conditions, 839 events. 276/839 cut-off events. For 8857/8857 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4447 event pairs, 41 based on Foata normal form. 1/838 useless extension candidates. Maximal degree in co-relation 5596. Up to 552 conditions per place. [2021-11-19 05:12:00,722 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 218 selfloop transitions, 73 changer transitions 35/365 dead transitions. [2021-11-19 05:12:00,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 365 transitions, 4717 flow [2021-11-19 05:12:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:12:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:12:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1737 transitions. [2021-11-19 05:12:00,724 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5599613152804642 [2021-11-19 05:12:00,724 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1737 transitions. [2021-11-19 05:12:00,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1737 transitions. [2021-11-19 05:12:00,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:00,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1737 transitions. [2021-11-19 05:12:00,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.63636363636363) internal successors, (1737), 33 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:00,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:00,728 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:00,728 INFO L186 Difference]: Start difference. First operand has 400 places, 345 transitions, 3955 flow. Second operand 33 states and 1737 transitions. [2021-11-19 05:12:00,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 365 transitions, 4717 flow [2021-11-19 05:12:00,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 365 transitions, 4460 flow, removed 24 selfloop flow, removed 31 redundant places. [2021-11-19 05:12:00,833 INFO L242 Difference]: Finished difference. Result has 382 places, 321 transitions, 3510 flow [2021-11-19 05:12:00,833 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3510, PETRI_PLACES=382, PETRI_TRANSITIONS=321} [2021-11-19 05:12:00,834 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 294 predicate places. [2021-11-19 05:12:00,834 INFO L470 AbstractCegarLoop]: Abstraction has has 382 places, 321 transitions, 3510 flow [2021-11-19 05:12:00,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:00,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:00,834 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:00,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-11-19 05:12:00,835 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash 700996550, now seen corresponding path program 133 times [2021-11-19 05:12:00,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:00,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480572929] [2021-11-19 05:12:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:00,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:01,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:01,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480572929] [2021-11-19 05:12:01,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480572929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:01,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:01,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:12:01,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124157893] [2021-11-19 05:12:01,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:01,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:12:01,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:12:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:12:01,247 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:01,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 321 transitions, 3510 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:01,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:01,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:01,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:03,129 INFO L129 PetriNetUnfolder]: 265/803 cut-off events. [2021-11-19 05:12:03,129 INFO L130 PetriNetUnfolder]: For 7139/7139 co-relation queries the response was YES. [2021-11-19 05:12:03,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5240 conditions, 803 events. 265/803 cut-off events. For 7139/7139 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4148 event pairs, 57 based on Foata normal form. 1/802 useless extension candidates. Maximal degree in co-relation 5118. Up to 543 conditions per place. [2021-11-19 05:12:03,143 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 210 selfloop transitions, 67 changer transitions 22/338 dead transitions. [2021-11-19 05:12:03,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 338 transitions, 4188 flow [2021-11-19 05:12:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:12:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1781 transitions. [2021-11-19 05:12:03,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5572590738423029 [2021-11-19 05:12:03,147 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1781 transitions. [2021-11-19 05:12:03,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1781 transitions. [2021-11-19 05:12:03,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:03,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1781 transitions. [2021-11-19 05:12:03,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.38235294117647) internal successors, (1781), 34 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:03,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:03,155 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:03,155 INFO L186 Difference]: Start difference. First operand has 382 places, 321 transitions, 3510 flow. Second operand 34 states and 1781 transitions. [2021-11-19 05:12:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 338 transitions, 4188 flow [2021-11-19 05:12:03,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 338 transitions, 3915 flow, removed 49 selfloop flow, removed 36 redundant places. [2021-11-19 05:12:03,274 INFO L242 Difference]: Finished difference. Result has 374 places, 307 transitions, 3252 flow [2021-11-19 05:12:03,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3252, PETRI_PLACES=374, PETRI_TRANSITIONS=307} [2021-11-19 05:12:03,275 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 286 predicate places. [2021-11-19 05:12:03,275 INFO L470 AbstractCegarLoop]: Abstraction has has 374 places, 307 transitions, 3252 flow [2021-11-19 05:12:03,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:03,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:03,275 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:03,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-11-19 05:12:03,275 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash -818327292, now seen corresponding path program 134 times [2021-11-19 05:12:03,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:03,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387031405] [2021-11-19 05:12:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:03,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:03,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:03,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387031405] [2021-11-19 05:12:03,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387031405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:03,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:03,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:12:03,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743979568] [2021-11-19 05:12:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:03,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:12:03,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:12:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:12:03,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:03,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 307 transitions, 3252 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:03,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:03,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:03,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:06,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:12:08,341 INFO L129 PetriNetUnfolder]: 267/809 cut-off events. [2021-11-19 05:12:08,341 INFO L130 PetriNetUnfolder]: For 7682/7682 co-relation queries the response was YES. [2021-11-19 05:12:08,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5226 conditions, 809 events. 267/809 cut-off events. For 7682/7682 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4234 event pairs, 42 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 5111. Up to 508 conditions per place. [2021-11-19 05:12:08,352 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 180 selfloop transitions, 97 changer transitions 26/342 dead transitions. [2021-11-19 05:12:08,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 342 transitions, 4196 flow [2021-11-19 05:12:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:12:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:12:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2044 transitions. [2021-11-19 05:12:08,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5575559192580469 [2021-11-19 05:12:08,354 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2044 transitions. [2021-11-19 05:12:08,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2044 transitions. [2021-11-19 05:12:08,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:08,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2044 transitions. [2021-11-19 05:12:08,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.41025641025641) internal successors, (2044), 39 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:08,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:08,359 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:08,359 INFO L186 Difference]: Start difference. First operand has 374 places, 307 transitions, 3252 flow. Second operand 39 states and 2044 transitions. [2021-11-19 05:12:08,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 342 transitions, 4196 flow [2021-11-19 05:12:08,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 342 transitions, 3914 flow, removed 28 selfloop flow, removed 35 redundant places. [2021-11-19 05:12:08,428 INFO L242 Difference]: Finished difference. Result has 366 places, 304 transitions, 3231 flow [2021-11-19 05:12:08,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3231, PETRI_PLACES=366, PETRI_TRANSITIONS=304} [2021-11-19 05:12:08,428 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 278 predicate places. [2021-11-19 05:12:08,428 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 304 transitions, 3231 flow [2021-11-19 05:12:08,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:08,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:08,429 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:08,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-11-19 05:12:08,429 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:08,429 INFO L85 PathProgramCache]: Analyzing trace with hash 41127888, now seen corresponding path program 135 times [2021-11-19 05:12:08,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:08,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836471259] [2021-11-19 05:12:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:08,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:08,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:08,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836471259] [2021-11-19 05:12:08,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836471259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:08,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:08,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:12:08,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632266546] [2021-11-19 05:12:08,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:08,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:12:08,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:12:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:12:08,927 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:08,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 304 transitions, 3231 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:08,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:08,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:08,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:10,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:12:11,740 INFO L129 PetriNetUnfolder]: 259/787 cut-off events. [2021-11-19 05:12:11,740 INFO L130 PetriNetUnfolder]: For 7002/7002 co-relation queries the response was YES. [2021-11-19 05:12:11,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5043 conditions, 787 events. 259/787 cut-off events. For 7002/7002 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4049 event pairs, 57 based on Foata normal form. 1/786 useless extension candidates. Maximal degree in co-relation 4929. Up to 536 conditions per place. [2021-11-19 05:12:11,753 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 199 selfloop transitions, 59 changer transitions 26/323 dead transitions. [2021-11-19 05:12:11,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 323 transitions, 3885 flow [2021-11-19 05:12:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:12:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:12:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1627 transitions. [2021-11-19 05:12:11,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5583390528483184 [2021-11-19 05:12:11,755 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1627 transitions. [2021-11-19 05:12:11,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1627 transitions. [2021-11-19 05:12:11,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:11,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1627 transitions. [2021-11-19 05:12:11,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.483870967741936) internal successors, (1627), 31 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) [2021-11-19 05:12:11,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:11,759 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:11,759 INFO L186 Difference]: Start difference. First operand has 366 places, 304 transitions, 3231 flow. Second operand 31 states and 1627 transitions. [2021-11-19 05:12:11,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 323 transitions, 3885 flow [2021-11-19 05:12:11,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 323 transitions, 3617 flow, removed 57 selfloop flow, removed 33 redundant places. [2021-11-19 05:12:11,832 INFO L242 Difference]: Finished difference. Result has 361 places, 288 transitions, 2943 flow [2021-11-19 05:12:11,833 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2943, PETRI_PLACES=361, PETRI_TRANSITIONS=288} [2021-11-19 05:12:11,833 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 273 predicate places. [2021-11-19 05:12:11,834 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 288 transitions, 2943 flow [2021-11-19 05:12:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:11,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:11,834 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:11,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-11-19 05:12:11,835 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash 374885306, now seen corresponding path program 136 times [2021-11-19 05:12:11,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:11,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452644466] [2021-11-19 05:12:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:12,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:12,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452644466] [2021-11-19 05:12:12,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452644466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:12,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:12,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:12:12,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092782877] [2021-11-19 05:12:12,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:12,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:12:12,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:12,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:12:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:12:12,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:12,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 288 transitions, 2943 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:12,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:12,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:12,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:15,289 INFO L129 PetriNetUnfolder]: 256/771 cut-off events. [2021-11-19 05:12:15,290 INFO L130 PetriNetUnfolder]: For 7577/7577 co-relation queries the response was YES. [2021-11-19 05:12:15,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4965 conditions, 771 events. 256/771 cut-off events. For 7577/7577 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3922 event pairs, 42 based on Foata normal form. 1/770 useless extension candidates. Maximal degree in co-relation 4851. Up to 494 conditions per place. [2021-11-19 05:12:15,302 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 163 selfloop transitions, 98 changer transitions 15/315 dead transitions. [2021-11-19 05:12:15,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 315 transitions, 3781 flow [2021-11-19 05:12:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:12:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:12:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1987 transitions. [2021-11-19 05:12:15,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5562709966405375 [2021-11-19 05:12:15,305 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1987 transitions. [2021-11-19 05:12:15,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1987 transitions. [2021-11-19 05:12:15,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:15,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1987 transitions. [2021-11-19 05:12:15,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.28947368421053) internal successors, (1987), 38 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:15,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:15,310 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:15,310 INFO L186 Difference]: Start difference. First operand has 361 places, 288 transitions, 2943 flow. Second operand 38 states and 1987 transitions. [2021-11-19 05:12:15,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 315 transitions, 3781 flow [2021-11-19 05:12:15,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 315 transitions, 3508 flow, removed 18 selfloop flow, removed 33 redundant places. [2021-11-19 05:12:15,373 INFO L242 Difference]: Finished difference. Result has 352 places, 288 transitions, 2968 flow [2021-11-19 05:12:15,373 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2968, PETRI_PLACES=352, PETRI_TRANSITIONS=288} [2021-11-19 05:12:15,374 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 264 predicate places. [2021-11-19 05:12:15,374 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 288 transitions, 2968 flow [2021-11-19 05:12:15,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:15,374 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:15,374 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:15,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-11-19 05:12:15,375 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:15,375 INFO L85 PathProgramCache]: Analyzing trace with hash 703140388, now seen corresponding path program 137 times [2021-11-19 05:12:15,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:15,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620362835] [2021-11-19 05:12:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:15,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:15,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:15,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620362835] [2021-11-19 05:12:15,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620362835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:15,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:15,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:12:15,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527776079] [2021-11-19 05:12:15,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:15,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:12:15,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:15,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:12:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:12:15,872 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:15,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 288 transitions, 2968 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:15,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:15,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:15,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:17,777 INFO L129 PetriNetUnfolder]: 256/775 cut-off events. [2021-11-19 05:12:17,777 INFO L130 PetriNetUnfolder]: For 7239/7239 co-relation queries the response was YES. [2021-11-19 05:12:17,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 775 events. 256/775 cut-off events. For 7239/7239 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3945 event pairs, 56 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 4814. Up to 498 conditions per place. [2021-11-19 05:12:17,787 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 160 selfloop transitions, 99 changer transitions 17/315 dead transitions. [2021-11-19 05:12:17,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 315 transitions, 3797 flow [2021-11-19 05:12:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:12:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-19 05:12:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2136 transitions. [2021-11-19 05:12:17,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5542293720809549 [2021-11-19 05:12:17,789 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2136 transitions. [2021-11-19 05:12:17,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2136 transitions. [2021-11-19 05:12:17,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:17,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2136 transitions. [2021-11-19 05:12:17,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.09756097560975) internal successors, (2136), 41 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:17,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:17,794 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:17,794 INFO L186 Difference]: Start difference. First operand has 352 places, 288 transitions, 2968 flow. Second operand 41 states and 2136 transitions. [2021-11-19 05:12:17,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 315 transitions, 3797 flow [2021-11-19 05:12:17,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 315 transitions, 3461 flow, removed 66 selfloop flow, removed 36 redundant places. [2021-11-19 05:12:17,851 INFO L242 Difference]: Finished difference. Result has 357 places, 288 transitions, 2957 flow [2021-11-19 05:12:17,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2957, PETRI_PLACES=357, PETRI_TRANSITIONS=288} [2021-11-19 05:12:17,852 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 269 predicate places. [2021-11-19 05:12:17,852 INFO L470 AbstractCegarLoop]: Abstraction has has 357 places, 288 transitions, 2957 flow [2021-11-19 05:12:17,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:17,852 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:17,852 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:17,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-11-19 05:12:17,853 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:17,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1061030682, now seen corresponding path program 138 times [2021-11-19 05:12:17,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:17,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456909840] [2021-11-19 05:12:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:17,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:18,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:18,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456909840] [2021-11-19 05:12:18,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456909840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:18,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:18,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:12:18,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989858058] [2021-11-19 05:12:18,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:18,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:12:18,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:12:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:12:18,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:18,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 288 transitions, 2957 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:18,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:18,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:18,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:21,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:12:21,837 INFO L129 PetriNetUnfolder]: 251/756 cut-off events. [2021-11-19 05:12:21,837 INFO L130 PetriNetUnfolder]: For 6354/6354 co-relation queries the response was YES. [2021-11-19 05:12:21,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4762 conditions, 756 events. 251/756 cut-off events. For 6354/6354 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3779 event pairs, 54 based on Foata normal form. 1/756 useless extension candidates. Maximal degree in co-relation 4650. Up to 481 conditions per place. [2021-11-19 05:12:21,847 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 157 selfloop transitions, 77 changer transitions 35/308 dead transitions. [2021-11-19 05:12:21,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 308 transitions, 3605 flow [2021-11-19 05:12:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:12:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1784 transitions. [2021-11-19 05:12:21,849 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.55819774718398 [2021-11-19 05:12:21,849 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1784 transitions. [2021-11-19 05:12:21,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1784 transitions. [2021-11-19 05:12:21,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:21,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1784 transitions. [2021-11-19 05:12:21,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.470588235294116) internal successors, (1784), 34 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:21,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:21,852 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:21,852 INFO L186 Difference]: Start difference. First operand has 357 places, 288 transitions, 2957 flow. Second operand 34 states and 1784 transitions. [2021-11-19 05:12:21,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 308 transitions, 3605 flow [2021-11-19 05:12:21,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 308 transitions, 3339 flow, removed 38 selfloop flow, removed 36 redundant places. [2021-11-19 05:12:21,915 INFO L242 Difference]: Finished difference. Result has 351 places, 263 transitions, 2583 flow [2021-11-19 05:12:21,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2583, PETRI_PLACES=351, PETRI_TRANSITIONS=263} [2021-11-19 05:12:21,916 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 263 predicate places. [2021-11-19 05:12:21,916 INFO L470 AbstractCegarLoop]: Abstraction has has 351 places, 263 transitions, 2583 flow [2021-11-19 05:12:21,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:21,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:21,917 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:21,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-11-19 05:12:21,917 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:21,918 INFO L85 PathProgramCache]: Analyzing trace with hash -373876680, now seen corresponding path program 139 times [2021-11-19 05:12:21,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:21,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898097595] [2021-11-19 05:12:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:21,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:22,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:22,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898097595] [2021-11-19 05:12:22,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898097595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:22,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:22,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:12:22,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014276616] [2021-11-19 05:12:22,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:22,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:12:22,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:12:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:12:22,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:22,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 263 transitions, 2583 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:22,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:22,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:22,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:24,304 INFO L129 PetriNetUnfolder]: 240/719 cut-off events. [2021-11-19 05:12:24,304 INFO L130 PetriNetUnfolder]: For 5930/5930 co-relation queries the response was YES. [2021-11-19 05:12:24,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4473 conditions, 719 events. 240/719 cut-off events. For 5930/5930 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3510 event pairs, 56 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 4361. Up to 473 conditions per place. [2021-11-19 05:12:24,315 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 148 selfloop transitions, 65 changer transitions 29/281 dead transitions. [2021-11-19 05:12:24,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 281 transitions, 3155 flow [2021-11-19 05:12:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:12:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:12:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1876 transitions. [2021-11-19 05:12:24,317 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5543735224586288 [2021-11-19 05:12:24,317 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1876 transitions. [2021-11-19 05:12:24,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1876 transitions. [2021-11-19 05:12:24,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:24,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1876 transitions. [2021-11-19 05:12:24,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.111111111111114) internal successors, (1876), 36 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:24,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:24,321 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:24,322 INFO L186 Difference]: Start difference. First operand has 351 places, 263 transitions, 2583 flow. Second operand 36 states and 1876 transitions. [2021-11-19 05:12:24,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 281 transitions, 3155 flow [2021-11-19 05:12:24,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 281 transitions, 2856 flow, removed 36 selfloop flow, removed 44 redundant places. [2021-11-19 05:12:24,373 INFO L242 Difference]: Finished difference. Result has 332 places, 243 transitions, 2256 flow [2021-11-19 05:12:24,373 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2256, PETRI_PLACES=332, PETRI_TRANSITIONS=243} [2021-11-19 05:12:24,373 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 244 predicate places. [2021-11-19 05:12:24,374 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 243 transitions, 2256 flow [2021-11-19 05:12:24,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:24,374 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:24,374 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:24,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-11-19 05:12:24,374 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash 136130630, now seen corresponding path program 140 times [2021-11-19 05:12:24,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:24,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663249543] [2021-11-19 05:12:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:24,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:24,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:24,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663249543] [2021-11-19 05:12:24,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663249543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:24,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:24,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:12:24,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476694792] [2021-11-19 05:12:24,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:24,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:12:24,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:24,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:12:24,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:12:24,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:24,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 243 transitions, 2256 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:24,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:24,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:24,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:26,289 INFO L129 PetriNetUnfolder]: 231/683 cut-off events. [2021-11-19 05:12:26,289 INFO L130 PetriNetUnfolder]: For 5585/5585 co-relation queries the response was YES. [2021-11-19 05:12:26,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 683 events. 231/683 cut-off events. For 5585/5585 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3236 event pairs, 41 based on Foata normal form. 1/682 useless extension candidates. Maximal degree in co-relation 4076. Up to 464 conditions per place. [2021-11-19 05:12:26,299 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 59 changer transitions 21/260 dead transitions. [2021-11-19 05:12:26,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 260 transitions, 2778 flow [2021-11-19 05:12:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:12:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1772 transitions. [2021-11-19 05:12:26,301 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5544430538172715 [2021-11-19 05:12:26,301 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1772 transitions. [2021-11-19 05:12:26,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1772 transitions. [2021-11-19 05:12:26,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:26,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1772 transitions. [2021-11-19 05:12:26,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.11764705882353) internal successors, (1772), 34 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:26,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:26,305 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:26,305 INFO L186 Difference]: Start difference. First operand has 332 places, 243 transitions, 2256 flow. Second operand 34 states and 1772 transitions. [2021-11-19 05:12:26,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 260 transitions, 2778 flow [2021-11-19 05:12:26,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 260 transitions, 2564 flow, removed 14 selfloop flow, removed 41 redundant places. [2021-11-19 05:12:26,347 INFO L242 Difference]: Finished difference. Result has 308 places, 230 transitions, 2094 flow [2021-11-19 05:12:26,347 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2094, PETRI_PLACES=308, PETRI_TRANSITIONS=230} [2021-11-19 05:12:26,347 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 220 predicate places. [2021-11-19 05:12:26,348 INFO L470 AbstractCegarLoop]: Abstraction has has 308 places, 230 transitions, 2094 flow [2021-11-19 05:12:26,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:26,348 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:26,348 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:26,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-11-19 05:12:26,348 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1260543988, now seen corresponding path program 141 times [2021-11-19 05:12:26,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:26,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181328027] [2021-11-19 05:12:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:26,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:26,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:26,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181328027] [2021-11-19 05:12:26,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181328027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:26,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:26,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:12:26,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504536794] [2021-11-19 05:12:26,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:12:26,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:12:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:12:26,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:26,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 230 transitions, 2094 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:26,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:26,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:26,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:28,396 INFO L129 PetriNetUnfolder]: 228/668 cut-off events. [2021-11-19 05:12:28,397 INFO L130 PetriNetUnfolder]: For 5226/5226 co-relation queries the response was YES. [2021-11-19 05:12:28,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 668 events. 228/668 cut-off events. For 5226/5226 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3116 event pairs, 42 based on Foata normal form. 1/667 useless extension candidates. Maximal degree in co-relation 3934. Up to 433 conditions per place. [2021-11-19 05:12:28,406 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 116 selfloop transitions, 46 changer transitions 48/249 dead transitions. [2021-11-19 05:12:28,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 249 transitions, 2594 flow [2021-11-19 05:12:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:12:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1776 transitions. [2021-11-19 05:12:28,409 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5556946182728411 [2021-11-19 05:12:28,409 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1776 transitions. [2021-11-19 05:12:28,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1776 transitions. [2021-11-19 05:12:28,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:28,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1776 transitions. [2021-11-19 05:12:28,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.23529411764706) internal successors, (1776), 34 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:28,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:28,413 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:28,413 INFO L186 Difference]: Start difference. First operand has 308 places, 230 transitions, 2094 flow. Second operand 34 states and 1776 transitions. [2021-11-19 05:12:28,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 249 transitions, 2594 flow [2021-11-19 05:12:28,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 249 transitions, 2378 flow, removed 13 selfloop flow, removed 34 redundant places. [2021-11-19 05:12:28,455 INFO L242 Difference]: Finished difference. Result has 292 places, 193 transitions, 1710 flow [2021-11-19 05:12:28,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1710, PETRI_PLACES=292, PETRI_TRANSITIONS=193} [2021-11-19 05:12:28,456 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 204 predicate places. [2021-11-19 05:12:28,456 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 193 transitions, 1710 flow [2021-11-19 05:12:28,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:28,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:28,456 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:28,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-11-19 05:12:28,457 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1252546484, now seen corresponding path program 142 times [2021-11-19 05:12:28,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:28,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131362256] [2021-11-19 05:12:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:28,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:28,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:28,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131362256] [2021-11-19 05:12:28,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131362256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:28,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:28,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:28,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495013612] [2021-11-19 05:12:28,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:28,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:28,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:28,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:28,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 193 transitions, 1710 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:28,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:28,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:28,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:30,649 INFO L129 PetriNetUnfolder]: 257/684 cut-off events. [2021-11-19 05:12:30,649 INFO L130 PetriNetUnfolder]: For 5693/5693 co-relation queries the response was YES. [2021-11-19 05:12:30,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4331 conditions, 684 events. 257/684 cut-off events. For 5693/5693 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3219 event pairs, 16 based on Foata normal form. 1/682 useless extension candidates. Maximal degree in co-relation 4240. Up to 435 conditions per place. [2021-11-19 05:12:30,658 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 123 selfloop transitions, 84 changer transitions 34/280 dead transitions. [2021-11-19 05:12:30,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 280 transitions, 3183 flow [2021-11-19 05:12:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:12:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:12:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2067 transitions. [2021-11-19 05:12:30,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2021-11-19 05:12:30,661 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2067 transitions. [2021-11-19 05:12:30,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2067 transitions. [2021-11-19 05:12:30,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:30,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2067 transitions. [2021-11-19 05:12:30,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.0) internal successors, (2067), 39 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:30,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:30,665 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:30,666 INFO L186 Difference]: Start difference. First operand has 292 places, 193 transitions, 1710 flow. Second operand 39 states and 2067 transitions. [2021-11-19 05:12:30,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 280 transitions, 3183 flow [2021-11-19 05:12:30,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 280 transitions, 2729 flow, removed 84 selfloop flow, removed 33 redundant places. [2021-11-19 05:12:30,696 INFO L242 Difference]: Finished difference. Result has 262 places, 227 transitions, 2047 flow [2021-11-19 05:12:30,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2047, PETRI_PLACES=262, PETRI_TRANSITIONS=227} [2021-11-19 05:12:30,697 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 174 predicate places. [2021-11-19 05:12:30,697 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 227 transitions, 2047 flow [2021-11-19 05:12:30,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:30,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:30,697 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:30,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-11-19 05:12:30,698 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2045228590, now seen corresponding path program 143 times [2021-11-19 05:12:30,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:30,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279756157] [2021-11-19 05:12:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:30,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:31,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:31,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279756157] [2021-11-19 05:12:31,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279756157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:31,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:31,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:31,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669043166] [2021-11-19 05:12:31,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:31,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:31,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:31,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:31,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:31,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 227 transitions, 2047 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:31,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:31,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:31,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:32,484 INFO L129 PetriNetUnfolder]: 255/727 cut-off events. [2021-11-19 05:12:32,484 INFO L130 PetriNetUnfolder]: For 5283/5283 co-relation queries the response was YES. [2021-11-19 05:12:32,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4230 conditions, 727 events. 255/727 cut-off events. For 5283/5283 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3596 event pairs, 39 based on Foata normal form. 1/726 useless extension candidates. Maximal degree in co-relation 4144. Up to 437 conditions per place. [2021-11-19 05:12:32,492 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 128 selfloop transitions, 74 changer transitions 35/276 dead transitions. [2021-11-19 05:12:32,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 276 transitions, 2968 flow [2021-11-19 05:12:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:12:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1812 transitions. [2021-11-19 05:12:32,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5669586983729662 [2021-11-19 05:12:32,494 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1812 transitions. [2021-11-19 05:12:32,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1812 transitions. [2021-11-19 05:12:32,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:32,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1812 transitions. [2021-11-19 05:12:32,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.294117647058826) internal successors, (1812), 34 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:32,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:32,498 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:32,498 INFO L186 Difference]: Start difference. First operand has 262 places, 227 transitions, 2047 flow. Second operand 34 states and 1812 transitions. [2021-11-19 05:12:32,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 276 transitions, 2968 flow [2021-11-19 05:12:32,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 276 transitions, 2625 flow, removed 137 selfloop flow, removed 22 redundant places. [2021-11-19 05:12:32,524 INFO L242 Difference]: Finished difference. Result has 276 places, 223 transitions, 1915 flow [2021-11-19 05:12:32,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1915, PETRI_PLACES=276, PETRI_TRANSITIONS=223} [2021-11-19 05:12:32,525 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 188 predicate places. [2021-11-19 05:12:32,525 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 223 transitions, 1915 flow [2021-11-19 05:12:32,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:32,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:32,525 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:32,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-11-19 05:12:32,525 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1444172866, now seen corresponding path program 144 times [2021-11-19 05:12:32,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:32,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866003248] [2021-11-19 05:12:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:32,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:32,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:32,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866003248] [2021-11-19 05:12:32,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866003248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:32,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:32,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:12:32,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507681729] [2021-11-19 05:12:32,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:32,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:12:32,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:32,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:12:32,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:12:32,948 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:32,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 223 transitions, 1915 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:32,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:32,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:32,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:34,622 INFO L129 PetriNetUnfolder]: 268/735 cut-off events. [2021-11-19 05:12:34,622 INFO L130 PetriNetUnfolder]: For 5810/5810 co-relation queries the response was YES. [2021-11-19 05:12:34,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 735 events. 268/735 cut-off events. For 5810/5810 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3648 event pairs, 37 based on Foata normal form. 1/733 useless extension candidates. Maximal degree in co-relation 4410. Up to 458 conditions per place. [2021-11-19 05:12:34,631 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 131 selfloop transitions, 97 changer transitions 33/300 dead transitions. [2021-11-19 05:12:34,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 300 transitions, 3319 flow [2021-11-19 05:12:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:12:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:12:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2062 transitions. [2021-11-19 05:12:34,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624659028914348 [2021-11-19 05:12:34,634 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2062 transitions. [2021-11-19 05:12:34,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2062 transitions. [2021-11-19 05:12:34,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:34,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2062 transitions. [2021-11-19 05:12:34,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.87179487179487) internal successors, (2062), 39 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:34,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:34,638 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:34,638 INFO L186 Difference]: Start difference. First operand has 276 places, 223 transitions, 1915 flow. Second operand 39 states and 2062 transitions. [2021-11-19 05:12:34,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 300 transitions, 3319 flow [2021-11-19 05:12:34,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 300 transitions, 3064 flow, removed 37 selfloop flow, removed 34 redundant places. [2021-11-19 05:12:34,673 INFO L242 Difference]: Finished difference. Result has 283 places, 252 transitions, 2408 flow [2021-11-19 05:12:34,673 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2408, PETRI_PLACES=283, PETRI_TRANSITIONS=252} [2021-11-19 05:12:34,678 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 195 predicate places. [2021-11-19 05:12:34,678 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 252 transitions, 2408 flow [2021-11-19 05:12:34,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:34,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:34,679 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:34,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-11-19 05:12:34,680 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1484675406, now seen corresponding path program 145 times [2021-11-19 05:12:34,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:34,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798031293] [2021-11-19 05:12:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:34,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:35,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:35,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798031293] [2021-11-19 05:12:35,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798031293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:35,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:35,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:12:35,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72188687] [2021-11-19 05:12:35,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:35,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:12:35,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:12:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:12:35,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:35,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 252 transitions, 2408 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:35,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:35,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:35,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:36,837 INFO L129 PetriNetUnfolder]: 267/768 cut-off events. [2021-11-19 05:12:36,837 INFO L130 PetriNetUnfolder]: For 6761/6761 co-relation queries the response was YES. [2021-11-19 05:12:36,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4717 conditions, 768 events. 267/768 cut-off events. For 6761/6761 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3949 event pairs, 45 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 4623. Up to 467 conditions per place. [2021-11-19 05:12:36,848 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 146 selfloop transitions, 78 changer transitions 35/298 dead transitions. [2021-11-19 05:12:36,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 298 transitions, 3382 flow [2021-11-19 05:12:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:12:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1805 transitions. [2021-11-19 05:12:36,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5647684605757196 [2021-11-19 05:12:36,850 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1805 transitions. [2021-11-19 05:12:36,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1805 transitions. [2021-11-19 05:12:36,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:36,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1805 transitions. [2021-11-19 05:12:36,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.088235294117645) internal successors, (1805), 34 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:36,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:36,854 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:36,854 INFO L186 Difference]: Start difference. First operand has 283 places, 252 transitions, 2408 flow. Second operand 34 states and 1805 transitions. [2021-11-19 05:12:36,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 298 transitions, 3382 flow [2021-11-19 05:12:36,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 298 transitions, 3053 flow, removed 112 selfloop flow, removed 27 redundant places. [2021-11-19 05:12:36,897 INFO L242 Difference]: Finished difference. Result has 292 places, 249 transitions, 2316 flow [2021-11-19 05:12:36,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2316, PETRI_PLACES=292, PETRI_TRANSITIONS=249} [2021-11-19 05:12:36,897 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 204 predicate places. [2021-11-19 05:12:36,898 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 249 transitions, 2316 flow [2021-11-19 05:12:36,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:36,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:36,898 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:36,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-11-19 05:12:36,898 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash -183150984, now seen corresponding path program 146 times [2021-11-19 05:12:36,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:36,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298505501] [2021-11-19 05:12:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:36,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:37,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:37,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298505501] [2021-11-19 05:12:37,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298505501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:37,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:37,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:37,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400793170] [2021-11-19 05:12:37,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:37,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:37,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:37,301 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:37,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 249 transitions, 2316 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:37,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:37,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:37,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:39,019 INFO L129 PetriNetUnfolder]: 286/828 cut-off events. [2021-11-19 05:12:39,019 INFO L130 PetriNetUnfolder]: For 8195/8195 co-relation queries the response was YES. [2021-11-19 05:12:39,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5234 conditions, 828 events. 286/828 cut-off events. For 8195/8195 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4288 event pairs, 50 based on Foata normal form. 1/826 useless extension candidates. Maximal degree in co-relation 5135. Up to 491 conditions per place. [2021-11-19 05:12:39,030 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 161 selfloop transitions, 111 changer transitions 22/333 dead transitions. [2021-11-19 05:12:39,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 333 transitions, 4138 flow [2021-11-19 05:12:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:12:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-19 05:12:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2125 transitions. [2021-11-19 05:12:39,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5651595744680851 [2021-11-19 05:12:39,033 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2125 transitions. [2021-11-19 05:12:39,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2125 transitions. [2021-11-19 05:12:39,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:39,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2125 transitions. [2021-11-19 05:12:39,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.125) internal successors, (2125), 40 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:39,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:39,038 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:39,038 INFO L186 Difference]: Start difference. First operand has 292 places, 249 transitions, 2316 flow. Second operand 40 states and 2125 transitions. [2021-11-19 05:12:39,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 333 transitions, 4138 flow [2021-11-19 05:12:39,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 333 transitions, 3854 flow, removed 45 selfloop flow, removed 34 redundant places. [2021-11-19 05:12:39,084 INFO L242 Difference]: Finished difference. Result has 297 places, 283 transitions, 3042 flow [2021-11-19 05:12:39,085 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3042, PETRI_PLACES=297, PETRI_TRANSITIONS=283} [2021-11-19 05:12:39,085 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2021-11-19 05:12:39,085 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 283 transitions, 3042 flow [2021-11-19 05:12:39,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:39,085 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:39,085 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:39,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-11-19 05:12:39,086 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash -350205900, now seen corresponding path program 147 times [2021-11-19 05:12:39,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:39,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052358578] [2021-11-19 05:12:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:39,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:39,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:39,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052358578] [2021-11-19 05:12:39,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052358578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:39,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:39,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846073137] [2021-11-19 05:12:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:39,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:39,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:39,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 283 transitions, 3042 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:39,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:39,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:39,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:41,077 INFO L129 PetriNetUnfolder]: 334/960 cut-off events. [2021-11-19 05:12:41,078 INFO L130 PetriNetUnfolder]: For 12514/12514 co-relation queries the response was YES. [2021-11-19 05:12:41,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6612 conditions, 960 events. 334/960 cut-off events. For 12514/12514 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 5241 event pairs, 65 based on Foata normal form. 1/958 useless extension candidates. Maximal degree in co-relation 6513. Up to 558 conditions per place. [2021-11-19 05:12:41,092 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 193 selfloop transitions, 132 changer transitions 22/386 dead transitions. [2021-11-19 05:12:41,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 386 transitions, 5505 flow [2021-11-19 05:12:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:12:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:12:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1970 transitions. [2021-11-19 05:12:41,094 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664174813110984 [2021-11-19 05:12:41,094 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1970 transitions. [2021-11-19 05:12:41,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1970 transitions. [2021-11-19 05:12:41,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:41,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1970 transitions. [2021-11-19 05:12:41,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.24324324324324) internal successors, (1970), 37 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:41,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:41,097 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:41,098 INFO L186 Difference]: Start difference. First operand has 297 places, 283 transitions, 3042 flow. Second operand 37 states and 1970 transitions. [2021-11-19 05:12:41,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 386 transitions, 5505 flow [2021-11-19 05:12:41,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 386 transitions, 4637 flow, removed 397 selfloop flow, removed 19 redundant places. [2021-11-19 05:12:41,166 INFO L242 Difference]: Finished difference. Result has 323 places, 337 transitions, 3846 flow [2021-11-19 05:12:41,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3846, PETRI_PLACES=323, PETRI_TRANSITIONS=337} [2021-11-19 05:12:41,167 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 235 predicate places. [2021-11-19 05:12:41,167 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 337 transitions, 3846 flow [2021-11-19 05:12:41,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:41,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:41,167 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:41,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-11-19 05:12:41,168 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:41,168 INFO L85 PathProgramCache]: Analyzing trace with hash 26643954, now seen corresponding path program 148 times [2021-11-19 05:12:41,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:41,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151106009] [2021-11-19 05:12:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:41,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:41,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:41,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151106009] [2021-11-19 05:12:41,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151106009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:41,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:41,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:41,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852159701] [2021-11-19 05:12:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:41,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:41,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:41,598 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:41,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 337 transitions, 3846 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:41,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:41,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:41,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:43,553 INFO L129 PetriNetUnfolder]: 378/1064 cut-off events. [2021-11-19 05:12:43,553 INFO L130 PetriNetUnfolder]: For 16418/16418 co-relation queries the response was YES. [2021-11-19 05:12:43,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7638 conditions, 1064 events. 378/1064 cut-off events. For 16418/16418 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5979 event pairs, 65 based on Foata normal form. 1/1062 useless extension candidates. Maximal degree in co-relation 7525. Up to 708 conditions per place. [2021-11-19 05:12:43,573 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 277 selfloop transitions, 97 changer transitions 21/434 dead transitions. [2021-11-19 05:12:43,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 434 transitions, 6186 flow [2021-11-19 05:12:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:12:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-19 05:12:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2128 transitions. [2021-11-19 05:12:43,575 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2021-11-19 05:12:43,575 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2128 transitions. [2021-11-19 05:12:43,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2128 transitions. [2021-11-19 05:12:43,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:43,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2128 transitions. [2021-11-19 05:12:43,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.2) internal successors, (2128), 40 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:43,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:43,580 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:43,580 INFO L186 Difference]: Start difference. First operand has 323 places, 337 transitions, 3846 flow. Second operand 40 states and 2128 transitions. [2021-11-19 05:12:43,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 434 transitions, 6186 flow [2021-11-19 05:12:43,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 434 transitions, 5734 flow, removed 193 selfloop flow, removed 17 redundant places. [2021-11-19 05:12:43,685 INFO L242 Difference]: Finished difference. Result has 348 places, 391 transitions, 4695 flow [2021-11-19 05:12:43,685 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4695, PETRI_PLACES=348, PETRI_TRANSITIONS=391} [2021-11-19 05:12:43,685 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 260 predicate places. [2021-11-19 05:12:43,685 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 391 transitions, 4695 flow [2021-11-19 05:12:43,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:43,686 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:43,686 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:43,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-11-19 05:12:43,686 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1276664648, now seen corresponding path program 149 times [2021-11-19 05:12:43,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:43,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969720942] [2021-11-19 05:12:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:43,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:44,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:44,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969720942] [2021-11-19 05:12:44,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969720942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:44,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:44,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:44,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668581224] [2021-11-19 05:12:44,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:44,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:44,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:44,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:44,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 391 transitions, 4695 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:44,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:44,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:44,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:46,396 INFO L129 PetriNetUnfolder]: 477/1321 cut-off events. [2021-11-19 05:12:46,397 INFO L130 PetriNetUnfolder]: For 23943/23943 co-relation queries the response was YES. [2021-11-19 05:12:46,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10014 conditions, 1321 events. 477/1321 cut-off events. For 23943/23943 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8040 event pairs, 68 based on Foata normal form. 1/1319 useless extension candidates. Maximal degree in co-relation 9893. Up to 844 conditions per place. [2021-11-19 05:12:46,423 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 335 selfloop transitions, 166 changer transitions 21/561 dead transitions. [2021-11-19 05:12:46,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 561 transitions, 8257 flow [2021-11-19 05:12:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:12:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:12:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2076 transitions. [2021-11-19 05:12:46,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5662847790507365 [2021-11-19 05:12:46,426 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2076 transitions. [2021-11-19 05:12:46,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2076 transitions. [2021-11-19 05:12:46,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:46,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2076 transitions. [2021-11-19 05:12:46,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.23076923076923) internal successors, (2076), 39 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:46,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:46,431 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:46,431 INFO L186 Difference]: Start difference. First operand has 348 places, 391 transitions, 4695 flow. Second operand 39 states and 2076 transitions. [2021-11-19 05:12:46,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 561 transitions, 8257 flow [2021-11-19 05:12:46,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 561 transitions, 7377 flow, removed 415 selfloop flow, removed 12 redundant places. [2021-11-19 05:12:46,591 INFO L242 Difference]: Finished difference. Result has 390 places, 509 transitions, 6346 flow [2021-11-19 05:12:46,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6346, PETRI_PLACES=390, PETRI_TRANSITIONS=509} [2021-11-19 05:12:46,592 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 302 predicate places. [2021-11-19 05:12:46,592 INFO L470 AbstractCegarLoop]: Abstraction has has 390 places, 509 transitions, 6346 flow [2021-11-19 05:12:46,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:46,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:46,593 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, 1, 1] [2021-11-19 05:12:46,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-11-19 05:12:46,593 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:46,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1742023944, now seen corresponding path program 150 times [2021-11-19 05:12:46,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:46,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733732353] [2021-11-19 05:12:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:46,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:47,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:47,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733732353] [2021-11-19 05:12:47,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733732353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:47,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:47,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:12:47,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719137831] [2021-11-19 05:12:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:47,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:12:47,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:12:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:12:47,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:47,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 509 transitions, 6346 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:47,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:47,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:47,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:50,982 INFO L129 PetriNetUnfolder]: 543/1513 cut-off events. [2021-11-19 05:12:50,982 INFO L130 PetriNetUnfolder]: For 33702/33702 co-relation queries the response was YES. [2021-11-19 05:12:51,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12155 conditions, 1513 events. 543/1513 cut-off events. For 33702/33702 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9671 event pairs, 50 based on Foata normal form. 1/1511 useless extension candidates. Maximal degree in co-relation 12014. Up to 841 conditions per place. [2021-11-19 05:12:51,014 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 301 selfloop transitions, 290 changer transitions 21/651 dead transitions. [2021-11-19 05:12:51,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 651 transitions, 9988 flow [2021-11-19 05:12:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 05:12:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-19 05:12:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2481 transitions. [2021-11-19 05:12:51,017 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5615663196016297 [2021-11-19 05:12:51,017 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2481 transitions. [2021-11-19 05:12:51,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2481 transitions. [2021-11-19 05:12:51,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:51,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2481 transitions. [2021-11-19 05:12:51,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 52.787234042553195) internal successors, (2481), 47 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:51,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:51,028 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:51,029 INFO L186 Difference]: Start difference. First operand has 390 places, 509 transitions, 6346 flow. Second operand 47 states and 2481 transitions. [2021-11-19 05:12:51,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 651 transitions, 9988 flow [2021-11-19 05:12:51,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 651 transitions, 9390 flow, removed 280 selfloop flow, removed 10 redundant places. [2021-11-19 05:12:51,246 INFO L242 Difference]: Finished difference. Result has 440 places, 608 transitions, 8544 flow [2021-11-19 05:12:51,246 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5752, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=8544, PETRI_PLACES=440, PETRI_TRANSITIONS=608} [2021-11-19 05:12:51,247 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 352 predicate places. [2021-11-19 05:12:51,247 INFO L470 AbstractCegarLoop]: Abstraction has has 440 places, 608 transitions, 8544 flow [2021-11-19 05:12:51,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:51,247 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:51,247 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:51,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-11-19 05:12:51,248 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1251856612, now seen corresponding path program 151 times [2021-11-19 05:12:51,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:51,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653639845] [2021-11-19 05:12:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:51,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:51,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:51,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653639845] [2021-11-19 05:12:51,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653639845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:51,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:51,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:51,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900822161] [2021-11-19 05:12:51,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:51,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:51,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:51,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:51,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 608 transitions, 8544 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:51,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:51,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:51,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:54,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:12:55,811 INFO L129 PetriNetUnfolder]: 548/1532 cut-off events. [2021-11-19 05:12:55,811 INFO L130 PetriNetUnfolder]: For 39609/39609 co-relation queries the response was YES. [2021-11-19 05:12:55,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13114 conditions, 1532 events. 548/1532 cut-off events. For 39609/39609 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9969 event pairs, 42 based on Foata normal form. 1/1530 useless extension candidates. Maximal degree in co-relation 12954. Up to 986 conditions per place. [2021-11-19 05:12:55,844 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 432 selfloop transitions, 168 changer transitions 35/674 dead transitions. [2021-11-19 05:12:55,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 674 transitions, 10945 flow [2021-11-19 05:12:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:12:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-19 05:12:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2122 transitions. [2021-11-19 05:12:55,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5643617021276596 [2021-11-19 05:12:55,847 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2122 transitions. [2021-11-19 05:12:55,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2122 transitions. [2021-11-19 05:12:55,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:55,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2122 transitions. [2021-11-19 05:12:55,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.05) internal successors, (2122), 40 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:55,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:55,851 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:55,851 INFO L186 Difference]: Start difference. First operand has 440 places, 608 transitions, 8544 flow. Second operand 40 states and 2122 transitions. [2021-11-19 05:12:55,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 674 transitions, 10945 flow [2021-11-19 05:12:56,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 674 transitions, 9960 flow, removed 435 selfloop flow, removed 19 redundant places. [2021-11-19 05:12:56,157 INFO L242 Difference]: Finished difference. Result has 464 places, 612 transitions, 8130 flow [2021-11-19 05:12:56,157 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7633, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=8130, PETRI_PLACES=464, PETRI_TRANSITIONS=612} [2021-11-19 05:12:56,158 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 376 predicate places. [2021-11-19 05:12:56,158 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 612 transitions, 8130 flow [2021-11-19 05:12:56,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:56,158 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:56,158 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:56,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-11-19 05:12:56,158 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2112551604, now seen corresponding path program 152 times [2021-11-19 05:12:56,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:56,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759457435] [2021-11-19 05:12:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:56,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:56,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:56,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759457435] [2021-11-19 05:12:56,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759457435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:56,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:56,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:12:56,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922006016] [2021-11-19 05:12:56,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:56,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:12:56,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:12:56,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:12:56,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:56,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 612 transitions, 8130 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:56,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:56,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:56,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:12:58,611 INFO L129 PetriNetUnfolder]: 551/1569 cut-off events. [2021-11-19 05:12:58,611 INFO L130 PetriNetUnfolder]: For 38042/38042 co-relation queries the response was YES. [2021-11-19 05:12:58,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12952 conditions, 1569 events. 551/1569 cut-off events. For 38042/38042 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 10407 event pairs, 47 based on Foata normal form. 1/1567 useless extension candidates. Maximal degree in co-relation 12783. Up to 1061 conditions per place. [2021-11-19 05:12:58,638 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 480 selfloop transitions, 136 changer transitions 31/686 dead transitions. [2021-11-19 05:12:58,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 686 transitions, 10743 flow [2021-11-19 05:12:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:12:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:12:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1712 transitions. [2021-11-19 05:12:58,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2021-11-19 05:12:58,640 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1712 transitions. [2021-11-19 05:12:58,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1712 transitions. [2021-11-19 05:12:58,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:12:58,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1712 transitions. [2021-11-19 05:12:58,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.5) internal successors, (1712), 32 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:58,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:58,644 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:58,644 INFO L186 Difference]: Start difference. First operand has 464 places, 612 transitions, 8130 flow. Second operand 32 states and 1712 transitions. [2021-11-19 05:12:58,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 686 transitions, 10743 flow [2021-11-19 05:12:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 686 transitions, 10208 flow, removed 178 selfloop flow, removed 34 redundant places. [2021-11-19 05:12:58,934 INFO L242 Difference]: Finished difference. Result has 464 places, 628 transitions, 8461 flow [2021-11-19 05:12:58,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8461, PETRI_PLACES=464, PETRI_TRANSITIONS=628} [2021-11-19 05:12:58,935 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 376 predicate places. [2021-11-19 05:12:58,935 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 628 transitions, 8461 flow [2021-11-19 05:12:58,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:58,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:12:58,936 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:58,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-11-19 05:12:58,936 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:12:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1725125888, now seen corresponding path program 153 times [2021-11-19 05:12:58,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:58,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883406943] [2021-11-19 05:12:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:58,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:59,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:59,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883406943] [2021-11-19 05:12:59,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883406943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:59,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:59,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:12:59,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223072748] [2021-11-19 05:12:59,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:59,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:59,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:59,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:59,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:59,367 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:12:59,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 628 transitions, 8461 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:12:59,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:12:59,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:12:59,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:01,537 INFO L129 PetriNetUnfolder]: 547/1565 cut-off events. [2021-11-19 05:13:01,537 INFO L130 PetriNetUnfolder]: For 34696/34696 co-relation queries the response was YES. [2021-11-19 05:13:01,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12696 conditions, 1565 events. 547/1565 cut-off events. For 34696/34696 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10391 event pairs, 49 based on Foata normal form. 1/1563 useless extension candidates. Maximal degree in co-relation 12523. Up to 1054 conditions per place. [2021-11-19 05:13:01,576 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 475 selfloop transitions, 127 changer transitions 41/682 dead transitions. [2021-11-19 05:13:01,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 682 transitions, 10523 flow [2021-11-19 05:13:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:13:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:13:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1810 transitions. [2021-11-19 05:13:01,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5663329161451814 [2021-11-19 05:13:01,578 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1810 transitions. [2021-11-19 05:13:01,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1810 transitions. [2021-11-19 05:13:01,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:01,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1810 transitions. [2021-11-19 05:13:01,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.23529411764706) internal successors, (1810), 34 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:01,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:01,582 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:01,582 INFO L186 Difference]: Start difference. First operand has 464 places, 628 transitions, 8461 flow. Second operand 34 states and 1810 transitions. [2021-11-19 05:13:01,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 682 transitions, 10523 flow [2021-11-19 05:13:01,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 682 transitions, 10131 flow, removed 110 selfloop flow, removed 26 redundant places. [2021-11-19 05:13:01,889 INFO L242 Difference]: Finished difference. Result has 476 places, 621 transitions, 8411 flow [2021-11-19 05:13:01,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8411, PETRI_PLACES=476, PETRI_TRANSITIONS=621} [2021-11-19 05:13:01,890 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 388 predicate places. [2021-11-19 05:13:01,890 INFO L470 AbstractCegarLoop]: Abstraction has has 476 places, 621 transitions, 8411 flow [2021-11-19 05:13:01,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:01,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:01,890 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:01,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-11-19 05:13:01,891 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:01,891 INFO L85 PathProgramCache]: Analyzing trace with hash -679106032, now seen corresponding path program 154 times [2021-11-19 05:13:01,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:01,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937769437] [2021-11-19 05:13:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:01,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:02,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:02,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937769437] [2021-11-19 05:13:02,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937769437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:02,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:02,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:13:02,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065840287] [2021-11-19 05:13:02,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:02,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:13:02,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:13:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:13:02,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:02,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 621 transitions, 8411 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:02,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:02,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:02,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:04,324 INFO L129 PetriNetUnfolder]: 547/1578 cut-off events. [2021-11-19 05:13:04,324 INFO L130 PetriNetUnfolder]: For 34206/34206 co-relation queries the response was YES. [2021-11-19 05:13:04,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12840 conditions, 1578 events. 547/1578 cut-off events. For 34206/34206 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10538 event pairs, 51 based on Foata normal form. 1/1576 useless extension candidates. Maximal degree in co-relation 12662. Up to 1026 conditions per place. [2021-11-19 05:13:04,361 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 453 selfloop transitions, 173 changer transitions 29/694 dead transitions. [2021-11-19 05:13:04,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 694 transitions, 10950 flow [2021-11-19 05:13:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:13:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:13:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1868 transitions. [2021-11-19 05:13:04,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5677811550151975 [2021-11-19 05:13:04,364 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1868 transitions. [2021-11-19 05:13:04,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1868 transitions. [2021-11-19 05:13:04,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:04,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1868 transitions. [2021-11-19 05:13:04,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.371428571428574) internal successors, (1868), 35 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:04,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:04,368 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:04,368 INFO L186 Difference]: Start difference. First operand has 476 places, 621 transitions, 8411 flow. Second operand 35 states and 1868 transitions. [2021-11-19 05:13:04,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 694 transitions, 10950 flow [2021-11-19 05:13:04,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 694 transitions, 10540 flow, removed 55 selfloop flow, removed 32 redundant places. [2021-11-19 05:13:04,664 INFO L242 Difference]: Finished difference. Result has 477 places, 639 transitions, 8922 flow [2021-11-19 05:13:04,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8053, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8922, PETRI_PLACES=477, PETRI_TRANSITIONS=639} [2021-11-19 05:13:04,665 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 389 predicate places. [2021-11-19 05:13:04,665 INFO L470 AbstractCegarLoop]: Abstraction has has 477 places, 639 transitions, 8922 flow [2021-11-19 05:13:04,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:04,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:04,665 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:04,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-11-19 05:13:04,666 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2009994756, now seen corresponding path program 155 times [2021-11-19 05:13:04,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:04,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098268401] [2021-11-19 05:13:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:04,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:05,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:05,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098268401] [2021-11-19 05:13:05,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098268401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:05,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:05,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:13:05,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596309650] [2021-11-19 05:13:05,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:13:05,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:13:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:13:05,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:05,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 639 transitions, 8922 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:05,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:05,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:05,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:08,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:13:09,711 INFO L129 PetriNetUnfolder]: 610/1761 cut-off events. [2021-11-19 05:13:09,711 INFO L130 PetriNetUnfolder]: For 40844/40844 co-relation queries the response was YES. [2021-11-19 05:13:09,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14623 conditions, 1761 events. 610/1761 cut-off events. For 40844/40844 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12110 event pairs, 46 based on Foata normal form. 1/1759 useless extension candidates. Maximal degree in co-relation 14447. Up to 920 conditions per place. [2021-11-19 05:13:09,744 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 340 selfloop transitions, 377 changer transitions 28/784 dead transitions. [2021-11-19 05:13:09,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 784 transitions, 13232 flow [2021-11-19 05:13:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 05:13:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-19 05:13:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2484 transitions. [2021-11-19 05:13:09,746 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5622453598913536 [2021-11-19 05:13:09,746 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2484 transitions. [2021-11-19 05:13:09,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2484 transitions. [2021-11-19 05:13:09,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:09,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2484 transitions. [2021-11-19 05:13:09,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 52.851063829787236) internal successors, (2484), 47 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:09,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:09,752 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:09,752 INFO L186 Difference]: Start difference. First operand has 477 places, 639 transitions, 8922 flow. Second operand 47 states and 2484 transitions. [2021-11-19 05:13:09,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 784 transitions, 13232 flow [2021-11-19 05:13:10,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 784 transitions, 12823 flow, removed 125 selfloop flow, removed 28 redundant places. [2021-11-19 05:13:10,054 INFO L242 Difference]: Finished difference. Result has 503 places, 722 transitions, 11544 flow [2021-11-19 05:13:10,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=11544, PETRI_PLACES=503, PETRI_TRANSITIONS=722} [2021-11-19 05:13:10,054 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 415 predicate places. [2021-11-19 05:13:10,054 INFO L470 AbstractCegarLoop]: Abstraction has has 503 places, 722 transitions, 11544 flow [2021-11-19 05:13:10,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:10,055 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:10,055 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:10,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-11-19 05:13:10,055 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:10,055 INFO L85 PathProgramCache]: Analyzing trace with hash 265163892, now seen corresponding path program 156 times [2021-11-19 05:13:10,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:10,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109429592] [2021-11-19 05:13:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:10,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:10,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:10,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109429592] [2021-11-19 05:13:10,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109429592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:10,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:10,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:10,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550806069] [2021-11-19 05:13:10,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:10,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:10,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:10,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:10,517 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:10,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 722 transitions, 11544 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:10,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:10,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:10,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:12,913 INFO L129 PetriNetUnfolder]: 611/1777 cut-off events. [2021-11-19 05:13:12,913 INFO L130 PetriNetUnfolder]: For 47475/47475 co-relation queries the response was YES. [2021-11-19 05:13:12,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15855 conditions, 1777 events. 611/1777 cut-off events. For 47475/47475 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12466 event pairs, 40 based on Foata normal form. 1/1775 useless extension candidates. Maximal degree in co-relation 15670. Up to 1128 conditions per place. [2021-11-19 05:13:12,957 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 501 selfloop transitions, 224 changer transitions 29/793 dead transitions. [2021-11-19 05:13:12,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 793 transitions, 14476 flow [2021-11-19 05:13:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 05:13:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-19 05:13:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2226 transitions. [2021-11-19 05:13:12,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2021-11-19 05:13:12,959 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2226 transitions. [2021-11-19 05:13:12,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2226 transitions. [2021-11-19 05:13:12,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:12,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2226 transitions. [2021-11-19 05:13:12,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 53.0) internal successors, (2226), 42 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:12,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:12,964 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:12,964 INFO L186 Difference]: Start difference. First operand has 503 places, 722 transitions, 11544 flow. Second operand 42 states and 2226 transitions. [2021-11-19 05:13:12,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 793 transitions, 14476 flow [2021-11-19 05:13:13,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 793 transitions, 13692 flow, removed 310 selfloop flow, removed 26 redundant places. [2021-11-19 05:13:13,423 INFO L242 Difference]: Finished difference. Result has 523 places, 735 transitions, 11831 flow [2021-11-19 05:13:13,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10866, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11831, PETRI_PLACES=523, PETRI_TRANSITIONS=735} [2021-11-19 05:13:13,424 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 435 predicate places. [2021-11-19 05:13:13,424 INFO L470 AbstractCegarLoop]: Abstraction has has 523 places, 735 transitions, 11831 flow [2021-11-19 05:13:13,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:13,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:13,425 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, 1, 1] [2021-11-19 05:13:13,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-11-19 05:13:13,425 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash 254875774, now seen corresponding path program 157 times [2021-11-19 05:13:13,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:13,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814918001] [2021-11-19 05:13:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:13,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:13,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:13,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814918001] [2021-11-19 05:13:13,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814918001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:13,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:13,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:13:13,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463290245] [2021-11-19 05:13:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:13,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:13:13,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:13:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:13:13,871 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:13,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 735 transitions, 11831 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:13,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:13,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:13,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:16,768 INFO L129 PetriNetUnfolder]: 611/1795 cut-off events. [2021-11-19 05:13:16,769 INFO L130 PetriNetUnfolder]: For 48754/48754 co-relation queries the response was YES. [2021-11-19 05:13:16,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15981 conditions, 1795 events. 611/1795 cut-off events. For 48754/48754 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12677 event pairs, 44 based on Foata normal form. 1/1793 useless extension candidates. Maximal degree in co-relation 15787. Up to 1143 conditions per place. [2021-11-19 05:13:16,815 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 512 selfloop transitions, 200 changer transitions 39/790 dead transitions. [2021-11-19 05:13:16,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 790 transitions, 14180 flow [2021-11-19 05:13:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 05:13:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-19 05:13:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2374 transitions. [2021-11-19 05:13:16,818 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5612293144208038 [2021-11-19 05:13:16,818 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2374 transitions. [2021-11-19 05:13:16,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2374 transitions. [2021-11-19 05:13:16,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:16,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2374 transitions. [2021-11-19 05:13:16,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 52.75555555555555) internal successors, (2374), 45 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:16,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:16,823 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:16,823 INFO L186 Difference]: Start difference. First operand has 523 places, 735 transitions, 11831 flow. Second operand 45 states and 2374 transitions. [2021-11-19 05:13:16,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 790 transitions, 14180 flow [2021-11-19 05:13:17,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 790 transitions, 13723 flow, removed 109 selfloop flow, removed 36 redundant places. [2021-11-19 05:13:17,233 INFO L242 Difference]: Finished difference. Result has 539 places, 734 transitions, 11930 flow [2021-11-19 05:13:17,234 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11409, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=11930, PETRI_PLACES=539, PETRI_TRANSITIONS=734} [2021-11-19 05:13:17,235 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 451 predicate places. [2021-11-19 05:13:17,235 INFO L470 AbstractCegarLoop]: Abstraction has has 539 places, 734 transitions, 11930 flow [2021-11-19 05:13:17,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:17,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:17,236 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:17,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-11-19 05:13:17,236 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash -71858130, now seen corresponding path program 158 times [2021-11-19 05:13:17,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:17,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697196157] [2021-11-19 05:13:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:17,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:17,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:17,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697196157] [2021-11-19 05:13:17,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697196157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:17,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:17,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:17,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841704020] [2021-11-19 05:13:17,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:17,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:17,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:17,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:17,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 734 transitions, 11930 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:17,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:17,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:17,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:20,014 INFO L129 PetriNetUnfolder]: 603/1782 cut-off events. [2021-11-19 05:13:20,014 INFO L130 PetriNetUnfolder]: For 47693/47693 co-relation queries the response was YES. [2021-11-19 05:13:20,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16027 conditions, 1782 events. 603/1782 cut-off events. For 47693/47693 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12554 event pairs, 46 based on Foata normal form. 1/1780 useless extension candidates. Maximal degree in co-relation 15825. Up to 1258 conditions per place. [2021-11-19 05:13:20,057 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 587 selfloop transitions, 116 changer transitions 35/777 dead transitions. [2021-11-19 05:13:20,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 777 transitions, 14180 flow [2021-11-19 05:13:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:13:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:13:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1910 transitions. [2021-11-19 05:13:20,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644208037825059 [2021-11-19 05:13:20,059 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1910 transitions. [2021-11-19 05:13:20,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1910 transitions. [2021-11-19 05:13:20,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:20,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1910 transitions. [2021-11-19 05:13:20,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.05555555555556) internal successors, (1910), 36 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:20,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:20,063 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:20,063 INFO L186 Difference]: Start difference. First operand has 539 places, 734 transitions, 11930 flow. Second operand 36 states and 1910 transitions. [2021-11-19 05:13:20,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 777 transitions, 14180 flow [2021-11-19 05:13:20,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 777 transitions, 13621 flow, removed 58 selfloop flow, removed 42 redundant places. [2021-11-19 05:13:20,429 INFO L242 Difference]: Finished difference. Result has 532 places, 727 transitions, 11663 flow [2021-11-19 05:13:20,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11409, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11663, PETRI_PLACES=532, PETRI_TRANSITIONS=727} [2021-11-19 05:13:20,430 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 444 predicate places. [2021-11-19 05:13:20,430 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 727 transitions, 11663 flow [2021-11-19 05:13:20,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:20,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:20,430 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:20,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-11-19 05:13:20,430 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 782340782, now seen corresponding path program 159 times [2021-11-19 05:13:20,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:20,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067958231] [2021-11-19 05:13:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:20,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:20,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:20,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067958231] [2021-11-19 05:13:20,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067958231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:20,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:20,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:13:20,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036562536] [2021-11-19 05:13:20,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:20,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:13:20,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:13:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:13:20,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:20,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 727 transitions, 11663 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:20,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:20,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:20,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:23,471 INFO L129 PetriNetUnfolder]: 599/1774 cut-off events. [2021-11-19 05:13:23,471 INFO L130 PetriNetUnfolder]: For 47332/47332 co-relation queries the response was YES. [2021-11-19 05:13:23,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15904 conditions, 1774 events. 599/1774 cut-off events. For 47332/47332 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12523 event pairs, 64 based on Foata normal form. 1/1772 useless extension candidates. Maximal degree in co-relation 15705. Up to 1273 conditions per place. [2021-11-19 05:13:23,513 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 607 selfloop transitions, 99 changer transitions 30/775 dead transitions. [2021-11-19 05:13:23,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 775 transitions, 14091 flow [2021-11-19 05:13:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:13:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:13:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1853 transitions. [2021-11-19 05:13:23,515 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5632218844984802 [2021-11-19 05:13:23,515 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1853 transitions. [2021-11-19 05:13:23,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1853 transitions. [2021-11-19 05:13:23,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:23,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1853 transitions. [2021-11-19 05:13:23,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.94285714285714) internal successors, (1853), 35 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:23,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:23,519 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:23,519 INFO L186 Difference]: Start difference. First operand has 532 places, 727 transitions, 11663 flow. Second operand 35 states and 1853 transitions. [2021-11-19 05:13:23,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 775 transitions, 14091 flow [2021-11-19 05:13:23,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 775 transitions, 13663 flow, removed 109 selfloop flow, removed 35 redundant places. [2021-11-19 05:13:23,949 INFO L242 Difference]: Finished difference. Result has 531 places, 728 transitions, 11728 flow [2021-11-19 05:13:23,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11355, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11728, PETRI_PLACES=531, PETRI_TRANSITIONS=728} [2021-11-19 05:13:23,951 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 443 predicate places. [2021-11-19 05:13:23,951 INFO L470 AbstractCegarLoop]: Abstraction has has 531 places, 728 transitions, 11728 flow [2021-11-19 05:13:23,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:23,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:23,952 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:23,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-11-19 05:13:23,952 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash 640111222, now seen corresponding path program 160 times [2021-11-19 05:13:23,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:23,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572532362] [2021-11-19 05:13:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:23,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:24,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:24,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572532362] [2021-11-19 05:13:24,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572532362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:24,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:24,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:24,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690320430] [2021-11-19 05:13:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:24,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:24,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:24,475 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:24,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 728 transitions, 11728 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:24,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:24,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:24,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:27,176 INFO L129 PetriNetUnfolder]: 642/1883 cut-off events. [2021-11-19 05:13:27,176 INFO L130 PetriNetUnfolder]: For 54885/54885 co-relation queries the response was YES. [2021-11-19 05:13:27,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17172 conditions, 1883 events. 642/1883 cut-off events. For 54885/54885 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13498 event pairs, 52 based on Foata normal form. 1/1881 useless extension candidates. Maximal degree in co-relation 16973. Up to 1322 conditions per place. [2021-11-19 05:13:27,216 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 625 selfloop transitions, 154 changer transitions 22/840 dead transitions. [2021-11-19 05:13:27,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 840 transitions, 15570 flow [2021-11-19 05:13:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:13:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-19 05:13:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2131 transitions. [2021-11-19 05:13:27,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667553191489362 [2021-11-19 05:13:27,218 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2131 transitions. [2021-11-19 05:13:27,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2131 transitions. [2021-11-19 05:13:27,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:27,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2131 transitions. [2021-11-19 05:13:27,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.275) internal successors, (2131), 40 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:27,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:27,223 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:27,223 INFO L186 Difference]: Start difference. First operand has 531 places, 728 transitions, 11728 flow. Second operand 40 states and 2131 transitions. [2021-11-19 05:13:27,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 840 transitions, 15570 flow [2021-11-19 05:13:27,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 840 transitions, 15247 flow, removed 80 selfloop flow, removed 31 redundant places. [2021-11-19 05:13:27,695 INFO L242 Difference]: Finished difference. Result has 546 places, 794 transitions, 13366 flow [2021-11-19 05:13:27,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11465, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=13366, PETRI_PLACES=546, PETRI_TRANSITIONS=794} [2021-11-19 05:13:27,696 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 458 predicate places. [2021-11-19 05:13:27,696 INFO L470 AbstractCegarLoop]: Abstraction has has 546 places, 794 transitions, 13366 flow [2021-11-19 05:13:27,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:27,696 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:27,696 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:27,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-11-19 05:13:27,696 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash -35174914, now seen corresponding path program 161 times [2021-11-19 05:13:27,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:27,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218991289] [2021-11-19 05:13:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:27,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:28,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:28,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218991289] [2021-11-19 05:13:28,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218991289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:28,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:28,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 05:13:28,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153564709] [2021-11-19 05:13:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:28,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:13:28,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:13:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:13:28,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:28,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 794 transitions, 13366 flow. Second operand has 17 states, 17 states have (on average 51.35294117647059) internal successors, (873), 17 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:28,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:28,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:28,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:30,316 INFO L129 PetriNetUnfolder]: 647/1901 cut-off events. [2021-11-19 05:13:30,316 INFO L130 PetriNetUnfolder]: For 60631/60631 co-relation queries the response was YES. [2021-11-19 05:13:30,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17934 conditions, 1901 events. 647/1901 cut-off events. For 60631/60631 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13741 event pairs, 62 based on Foata normal form. 1/1899 useless extension candidates. Maximal degree in co-relation 17725. Up to 1394 conditions per place. [2021-11-19 05:13:30,373 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 682 selfloop transitions, 98 changer transitions 27/846 dead transitions. [2021-11-19 05:13:30,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 846 transitions, 16016 flow [2021-11-19 05:13:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 05:13:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-19 05:13:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1514 transitions. [2021-11-19 05:13:30,375 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5752279635258358 [2021-11-19 05:13:30,375 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1514 transitions. [2021-11-19 05:13:30,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1514 transitions. [2021-11-19 05:13:30,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:30,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1514 transitions. [2021-11-19 05:13:30,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.07142857142857) internal successors, (1514), 28 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:30,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:30,380 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:30,380 INFO L186 Difference]: Start difference. First operand has 546 places, 794 transitions, 13366 flow. Second operand 28 states and 1514 transitions. [2021-11-19 05:13:30,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 846 transitions, 16016 flow [2021-11-19 05:13:30,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 846 transitions, 15077 flow, removed 440 selfloop flow, removed 13 redundant places. [2021-11-19 05:13:30,980 INFO L242 Difference]: Finished difference. Result has 564 places, 801 transitions, 12942 flow [2021-11-19 05:13:30,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=12453, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12942, PETRI_PLACES=564, PETRI_TRANSITIONS=801} [2021-11-19 05:13:30,981 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 476 predicate places. [2021-11-19 05:13:30,981 INFO L470 AbstractCegarLoop]: Abstraction has has 564 places, 801 transitions, 12942 flow [2021-11-19 05:13:30,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 51.35294117647059) internal successors, (873), 17 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:30,981 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:30,981 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:30,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-11-19 05:13:30,981 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1116907724, now seen corresponding path program 162 times [2021-11-19 05:13:30,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:30,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148508558] [2021-11-19 05:13:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:30,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:31,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:31,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148508558] [2021-11-19 05:13:31,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148508558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:31,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:31,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:31,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989511976] [2021-11-19 05:13:31,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:31,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:31,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:31,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:31,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 801 transitions, 12942 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:31,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:31,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:31,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:34,114 INFO L129 PetriNetUnfolder]: 708/2083 cut-off events. [2021-11-19 05:13:34,114 INFO L130 PetriNetUnfolder]: For 71304/71304 co-relation queries the response was YES. [2021-11-19 05:13:34,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19469 conditions, 2083 events. 708/2083 cut-off events. For 71304/71304 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15501 event pairs, 58 based on Foata normal form. 1/2081 useless extension candidates. Maximal degree in co-relation 19252. Up to 1453 conditions per place. [2021-11-19 05:13:34,175 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 707 selfloop transitions, 166 changer transitions 23/935 dead transitions. [2021-11-19 05:13:34,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 935 transitions, 17496 flow [2021-11-19 05:13:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:13:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:13:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1974 transitions. [2021-11-19 05:13:34,177 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2021-11-19 05:13:34,177 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1974 transitions. [2021-11-19 05:13:34,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1974 transitions. [2021-11-19 05:13:34,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:34,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1974 transitions. [2021-11-19 05:13:34,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.351351351351354) internal successors, (1974), 37 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:34,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:34,182 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:34,182 INFO L186 Difference]: Start difference. First operand has 564 places, 801 transitions, 12942 flow. Second operand 37 states and 1974 transitions. [2021-11-19 05:13:34,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 935 transitions, 17496 flow [2021-11-19 05:13:34,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 935 transitions, 17029 flow, removed 179 selfloop flow, removed 22 redundant places. [2021-11-19 05:13:34,935 INFO L242 Difference]: Finished difference. Result has 585 places, 878 transitions, 14833 flow [2021-11-19 05:13:34,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=12670, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14833, PETRI_PLACES=585, PETRI_TRANSITIONS=878} [2021-11-19 05:13:34,936 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 497 predicate places. [2021-11-19 05:13:34,936 INFO L470 AbstractCegarLoop]: Abstraction has has 585 places, 878 transitions, 14833 flow [2021-11-19 05:13:34,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:34,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:34,937 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:34,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-11-19 05:13:34,937 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:34,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash -168874730, now seen corresponding path program 163 times [2021-11-19 05:13:34,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:34,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924814863] [2021-11-19 05:13:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:34,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:35,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:35,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924814863] [2021-11-19 05:13:35,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924814863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:35,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:35,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:13:35,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829639333] [2021-11-19 05:13:35,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:35,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:13:35,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:13:35,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:13:35,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:35,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 878 transitions, 14833 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:35,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:35,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:35,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:37,986 INFO L129 PetriNetUnfolder]: 709/2103 cut-off events. [2021-11-19 05:13:37,986 INFO L130 PetriNetUnfolder]: For 78803/78803 co-relation queries the response was YES. [2021-11-19 05:13:38,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20167 conditions, 2103 events. 709/2103 cut-off events. For 78803/78803 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 15837 event pairs, 54 based on Foata normal form. 1/2101 useless extension candidates. Maximal degree in co-relation 19943. Up to 1502 conditions per place. [2021-11-19 05:13:38,035 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 735 selfloop transitions, 132 changer transitions 29/935 dead transitions. [2021-11-19 05:13:38,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 935 transitions, 17911 flow [2021-11-19 05:13:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:13:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:13:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1772 transitions. [2021-11-19 05:13:38,036 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.571244358478401 [2021-11-19 05:13:38,037 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1772 transitions. [2021-11-19 05:13:38,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1772 transitions. [2021-11-19 05:13:38,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:38,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1772 transitions. [2021-11-19 05:13:38,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.696969696969695) internal successors, (1772), 33 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:38,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:38,040 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:38,040 INFO L186 Difference]: Start difference. First operand has 585 places, 878 transitions, 14833 flow. Second operand 33 states and 1772 transitions. [2021-11-19 05:13:38,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 935 transitions, 17911 flow [2021-11-19 05:13:38,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 935 transitions, 17043 flow, removed 381 selfloop flow, removed 19 redundant places. [2021-11-19 05:13:38,689 INFO L242 Difference]: Finished difference. Result has 602 places, 883 transitions, 14620 flow [2021-11-19 05:13:38,690 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14045, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=14620, PETRI_PLACES=602, PETRI_TRANSITIONS=883} [2021-11-19 05:13:38,690 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 514 predicate places. [2021-11-19 05:13:38,690 INFO L470 AbstractCegarLoop]: Abstraction has has 602 places, 883 transitions, 14620 flow [2021-11-19 05:13:38,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:38,690 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:38,690 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:38,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-11-19 05:13:38,691 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:38,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1627399404, now seen corresponding path program 164 times [2021-11-19 05:13:38,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:38,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355175539] [2021-11-19 05:13:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:38,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:39,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:39,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355175539] [2021-11-19 05:13:39,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355175539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:39,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:39,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:13:39,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404016178] [2021-11-19 05:13:39,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:39,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:13:39,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:39,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:13:39,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:13:39,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:39,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 883 transitions, 14620 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:39,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:39,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:39,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:41,539 INFO L129 PetriNetUnfolder]: 715/2140 cut-off events. [2021-11-19 05:13:41,539 INFO L130 PetriNetUnfolder]: For 80886/80886 co-relation queries the response was YES. [2021-11-19 05:13:41,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20362 conditions, 2140 events. 715/2140 cut-off events. For 80886/80886 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 16291 event pairs, 55 based on Foata normal form. 1/2138 useless extension candidates. Maximal degree in co-relation 20129. Up to 1540 conditions per place. [2021-11-19 05:13:41,605 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 764 selfloop transitions, 120 changer transitions 29/952 dead transitions. [2021-11-19 05:13:41,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 952 transitions, 18140 flow [2021-11-19 05:13:41,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:13:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:13:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1717 transitions. [2021-11-19 05:13:41,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.570811170212766 [2021-11-19 05:13:41,607 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1717 transitions. [2021-11-19 05:13:41,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1717 transitions. [2021-11-19 05:13:41,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:41,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1717 transitions. [2021-11-19 05:13:41,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.65625) internal successors, (1717), 32 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:41,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:41,612 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:41,612 INFO L186 Difference]: Start difference. First operand has 602 places, 883 transitions, 14620 flow. Second operand 32 states and 1717 transitions. [2021-11-19 05:13:41,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 952 transitions, 18140 flow [2021-11-19 05:13:42,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 952 transitions, 17557 flow, removed 221 selfloop flow, removed 27 redundant places. [2021-11-19 05:13:42,465 INFO L242 Difference]: Finished difference. Result has 609 places, 901 transitions, 15117 flow [2021-11-19 05:13:42,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14263, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15117, PETRI_PLACES=609, PETRI_TRANSITIONS=901} [2021-11-19 05:13:42,470 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 521 predicate places. [2021-11-19 05:13:42,470 INFO L470 AbstractCegarLoop]: Abstraction has has 609 places, 901 transitions, 15117 flow [2021-11-19 05:13:42,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:42,471 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:42,471 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:42,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-11-19 05:13:42,472 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1085691492, now seen corresponding path program 165 times [2021-11-19 05:13:42,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:42,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708547939] [2021-11-19 05:13:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:42,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:42,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:42,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708547939] [2021-11-19 05:13:42,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708547939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:42,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:42,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:42,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205412208] [2021-11-19 05:13:42,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:42,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:42,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:42,925 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:42,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 901 transitions, 15117 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:42,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:42,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:42,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:46,113 INFO L129 PetriNetUnfolder]: 718/2139 cut-off events. [2021-11-19 05:13:46,113 INFO L130 PetriNetUnfolder]: For 82547/82547 co-relation queries the response was YES. [2021-11-19 05:13:46,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20543 conditions, 2139 events. 718/2139 cut-off events. For 82547/82547 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16257 event pairs, 53 based on Foata normal form. 1/2137 useless extension candidates. Maximal degree in co-relation 20307. Up to 1542 conditions per place. [2021-11-19 05:13:46,179 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 762 selfloop transitions, 130 changer transitions 30/961 dead transitions. [2021-11-19 05:13:46,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 961 transitions, 18406 flow [2021-11-19 05:13:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:13:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:13:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1969 transitions. [2021-11-19 05:13:46,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.566129959746981 [2021-11-19 05:13:46,181 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1969 transitions. [2021-11-19 05:13:46,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1969 transitions. [2021-11-19 05:13:46,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:46,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1969 transitions. [2021-11-19 05:13:46,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.21621621621622) internal successors, (1969), 37 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:46,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:46,185 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:46,186 INFO L186 Difference]: Start difference. First operand has 609 places, 901 transitions, 15117 flow. Second operand 37 states and 1969 transitions. [2021-11-19 05:13:46,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 961 transitions, 18406 flow [2021-11-19 05:13:46,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 961 transitions, 17953 flow, removed 146 selfloop flow, removed 25 redundant places. [2021-11-19 05:13:46,942 INFO L242 Difference]: Finished difference. Result has 625 places, 909 transitions, 15404 flow [2021-11-19 05:13:46,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14705, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=15404, PETRI_PLACES=625, PETRI_TRANSITIONS=909} [2021-11-19 05:13:46,943 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 537 predicate places. [2021-11-19 05:13:46,944 INFO L470 AbstractCegarLoop]: Abstraction has has 625 places, 909 transitions, 15404 flow [2021-11-19 05:13:46,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:46,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:46,944 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:46,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-11-19 05:13:46,944 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:46,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1764750240, now seen corresponding path program 166 times [2021-11-19 05:13:46,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:46,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935740806] [2021-11-19 05:13:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:46,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:47,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:47,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935740806] [2021-11-19 05:13:47,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935740806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:47,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:47,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:47,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801788686] [2021-11-19 05:13:47,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:47,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:47,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:47,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:47,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 909 transitions, 15404 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:47,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:47,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:47,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:50,284 INFO L129 PetriNetUnfolder]: 713/2135 cut-off events. [2021-11-19 05:13:50,285 INFO L130 PetriNetUnfolder]: For 80589/80589 co-relation queries the response was YES. [2021-11-19 05:13:50,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20425 conditions, 2135 events. 713/2135 cut-off events. For 80589/80589 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16273 event pairs, 60 based on Foata normal form. 1/2133 useless extension candidates. Maximal degree in co-relation 20184. Up to 1546 conditions per place. [2021-11-19 05:13:50,345 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 771 selfloop transitions, 108 changer transitions 35/953 dead transitions. [2021-11-19 05:13:50,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 953 transitions, 17987 flow [2021-11-19 05:13:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:13:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:13:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1813 transitions. [2021-11-19 05:13:50,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5672715894868585 [2021-11-19 05:13:50,347 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1813 transitions. [2021-11-19 05:13:50,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1813 transitions. [2021-11-19 05:13:50,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:50,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1813 transitions. [2021-11-19 05:13:50,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.3235294117647) internal successors, (1813), 34 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:50,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:50,351 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:50,351 INFO L186 Difference]: Start difference. First operand has 625 places, 909 transitions, 15404 flow. Second operand 34 states and 1813 transitions. [2021-11-19 05:13:50,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 953 transitions, 17987 flow [2021-11-19 05:13:51,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 953 transitions, 17469 flow, removed 165 selfloop flow, removed 29 redundant places. [2021-11-19 05:13:51,229 INFO L242 Difference]: Finished difference. Result has 631 places, 901 transitions, 15130 flow [2021-11-19 05:13:51,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14932, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15130, PETRI_PLACES=631, PETRI_TRANSITIONS=901} [2021-11-19 05:13:51,230 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 543 predicate places. [2021-11-19 05:13:51,231 INFO L470 AbstractCegarLoop]: Abstraction has has 631 places, 901 transitions, 15130 flow [2021-11-19 05:13:51,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:51,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:51,231 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:51,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-11-19 05:13:51,231 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash -622251284, now seen corresponding path program 167 times [2021-11-19 05:13:51,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:51,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767936970] [2021-11-19 05:13:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:51,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:51,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:51,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767936970] [2021-11-19 05:13:51,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767936970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:51,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:51,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:51,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503230379] [2021-11-19 05:13:51,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:51,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:51,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:51,648 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:51,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 901 transitions, 15130 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:51,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:51,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:51,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:54,629 INFO L129 PetriNetUnfolder]: 731/2183 cut-off events. [2021-11-19 05:13:54,629 INFO L130 PetriNetUnfolder]: For 84657/84657 co-relation queries the response was YES. [2021-11-19 05:13:54,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21049 conditions, 2183 events. 731/2183 cut-off events. For 84657/84657 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 16628 event pairs, 55 based on Foata normal form. 1/2181 useless extension candidates. Maximal degree in co-relation 20807. Up to 1601 conditions per place. [2021-11-19 05:13:54,687 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 808 selfloop transitions, 111 changer transitions 20/978 dead transitions. [2021-11-19 05:13:54,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 978 transitions, 18881 flow [2021-11-19 05:13:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:13:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:13:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1821 transitions. [2021-11-19 05:13:54,690 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5697747183979975 [2021-11-19 05:13:54,690 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1821 transitions. [2021-11-19 05:13:54,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1821 transitions. [2021-11-19 05:13:54,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:54,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1821 transitions. [2021-11-19 05:13:54,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.55882352941177) internal successors, (1821), 34 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:54,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:54,694 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:54,695 INFO L186 Difference]: Start difference. First operand has 631 places, 901 transitions, 15130 flow. Second operand 34 states and 1821 transitions. [2021-11-19 05:13:54,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 978 transitions, 18881 flow [2021-11-19 05:13:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 978 transitions, 18500 flow, removed 43 selfloop flow, removed 36 redundant places. [2021-11-19 05:13:55,541 INFO L242 Difference]: Finished difference. Result has 624 places, 932 transitions, 16006 flow [2021-11-19 05:13:55,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14823, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16006, PETRI_PLACES=624, PETRI_TRANSITIONS=932} [2021-11-19 05:13:55,542 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 536 predicate places. [2021-11-19 05:13:55,542 INFO L470 AbstractCegarLoop]: Abstraction has has 624 places, 932 transitions, 16006 flow [2021-11-19 05:13:55,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:55,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:55,543 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:55,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-11-19 05:13:55,543 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:55,543 INFO L85 PathProgramCache]: Analyzing trace with hash -946577164, now seen corresponding path program 168 times [2021-11-19 05:13:55,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:55,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232238963] [2021-11-19 05:13:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:55,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:55,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:55,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232238963] [2021-11-19 05:13:55,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232238963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:13:55,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:13:55,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:13:55,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320171585] [2021-11-19 05:13:55,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:13:55,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:13:55,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:13:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:13:55,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:13:55,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 932 transitions, 16006 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:55,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:13:55,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:13:55,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:13:58,943 INFO L129 PetriNetUnfolder]: 732/2200 cut-off events. [2021-11-19 05:13:58,943 INFO L130 PetriNetUnfolder]: For 88510/88510 co-relation queries the response was YES. [2021-11-19 05:13:58,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21331 conditions, 2200 events. 732/2200 cut-off events. For 88510/88510 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 16870 event pairs, 56 based on Foata normal form. 1/2198 useless extension candidates. Maximal degree in co-relation 21092. Up to 1631 conditions per place. [2021-11-19 05:13:58,996 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 820 selfloop transitions, 98 changer transitions 22/979 dead transitions. [2021-11-19 05:13:58,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 979 transitions, 18601 flow [2021-11-19 05:13:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 05:13:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-19 05:13:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1555 transitions. [2021-11-19 05:13:58,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5704328686720469 [2021-11-19 05:13:58,998 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1555 transitions. [2021-11-19 05:13:58,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1555 transitions. [2021-11-19 05:13:58,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:13:58,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1555 transitions. [2021-11-19 05:13:58,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.62068965517241) internal successors, (1555), 29 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:59,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:59,001 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:59,001 INFO L186 Difference]: Start difference. First operand has 624 places, 932 transitions, 16006 flow. Second operand 29 states and 1555 transitions. [2021-11-19 05:13:59,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 979 transitions, 18601 flow [2021-11-19 05:13:59,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 979 transitions, 17941 flow, removed 291 selfloop flow, removed 14 redundant places. [2021-11-19 05:13:59,889 INFO L242 Difference]: Finished difference. Result has 642 places, 938 transitions, 15755 flow [2021-11-19 05:13:59,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15374, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15755, PETRI_PLACES=642, PETRI_TRANSITIONS=938} [2021-11-19 05:13:59,890 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 554 predicate places. [2021-11-19 05:13:59,890 INFO L470 AbstractCegarLoop]: Abstraction has has 642 places, 938 transitions, 15755 flow [2021-11-19 05:13:59,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:13:59,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:13:59,891 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:59,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-11-19 05:13:59,891 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:13:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1819532116, now seen corresponding path program 169 times [2021-11-19 05:13:59,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:59,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180819932] [2021-11-19 05:13:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:59,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:00,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:00,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180819932] [2021-11-19 05:14:00,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180819932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:00,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:00,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:14:00,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119221174] [2021-11-19 05:14:00,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:00,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:14:00,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:14:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:14:00,292 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:00,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 938 transitions, 15755 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:00,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:00,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:00,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:03,368 INFO L129 PetriNetUnfolder]: 733/2216 cut-off events. [2021-11-19 05:14:03,368 INFO L130 PetriNetUnfolder]: For 90040/90040 co-relation queries the response was YES. [2021-11-19 05:14:03,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 2216 events. 733/2216 cut-off events. For 90040/90040 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 17053 event pairs, 56 based on Foata normal form. 1/2214 useless extension candidates. Maximal degree in co-relation 21096. Up to 1626 conditions per place. [2021-11-19 05:14:03,432 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 814 selfloop transitions, 114 changer transitions 18/985 dead transitions. [2021-11-19 05:14:03,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 985 transitions, 18747 flow [2021-11-19 05:14:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:14:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-19 05:14:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1614 transitions. [2021-11-19 05:14:03,434 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5723404255319149 [2021-11-19 05:14:03,434 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1614 transitions. [2021-11-19 05:14:03,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1614 transitions. [2021-11-19 05:14:03,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:03,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1614 transitions. [2021-11-19 05:14:03,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.8) internal successors, (1614), 30 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:03,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:03,439 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:03,439 INFO L186 Difference]: Start difference. First operand has 642 places, 938 transitions, 15755 flow. Second operand 30 states and 1614 transitions. [2021-11-19 05:14:03,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 985 transitions, 18747 flow [2021-11-19 05:14:04,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 985 transitions, 18408 flow, removed 111 selfloop flow, removed 21 redundant places. [2021-11-19 05:14:04,429 INFO L242 Difference]: Finished difference. Result has 650 places, 946 transitions, 16119 flow [2021-11-19 05:14:04,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15506, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16119, PETRI_PLACES=650, PETRI_TRANSITIONS=946} [2021-11-19 05:14:04,431 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 562 predicate places. [2021-11-19 05:14:04,431 INFO L470 AbstractCegarLoop]: Abstraction has has 650 places, 946 transitions, 16119 flow [2021-11-19 05:14:04,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:04,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:04,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:04,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-11-19 05:14:04,432 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1203377964, now seen corresponding path program 170 times [2021-11-19 05:14:04,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:04,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744645065] [2021-11-19 05:14:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:04,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:04,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:04,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744645065] [2021-11-19 05:14:04,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744645065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:04,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:04,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:04,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122186130] [2021-11-19 05:14:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:04,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:04,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:04,896 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:04,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 946 transitions, 16119 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:04,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:04,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:04,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:08,053 INFO L129 PetriNetUnfolder]: 756/2279 cut-off events. [2021-11-19 05:14:08,054 INFO L130 PetriNetUnfolder]: For 99502/99502 co-relation queries the response was YES. [2021-11-19 05:14:08,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22377 conditions, 2279 events. 756/2279 cut-off events. For 99502/99502 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 17657 event pairs, 53 based on Foata normal form. 1/2277 useless extension candidates. Maximal degree in co-relation 22128. Up to 1670 conditions per place. [2021-11-19 05:14:08,121 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 836 selfloop transitions, 123 changer transitions 23/1021 dead transitions. [2021-11-19 05:14:08,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 1021 transitions, 20128 flow [2021-11-19 05:14:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:14:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:14:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2072 transitions. [2021-11-19 05:14:08,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5651936715766503 [2021-11-19 05:14:08,124 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2072 transitions. [2021-11-19 05:14:08,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2072 transitions. [2021-11-19 05:14:08,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:08,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2072 transitions. [2021-11-19 05:14:08,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.12820512820513) internal successors, (2072), 39 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:08,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:08,128 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:08,128 INFO L186 Difference]: Start difference. First operand has 650 places, 946 transitions, 16119 flow. Second operand 39 states and 2072 transitions. [2021-11-19 05:14:08,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 1021 transitions, 20128 flow [2021-11-19 05:14:09,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 1021 transitions, 19602 flow, removed 180 selfloop flow, removed 25 redundant places. [2021-11-19 05:14:09,164 INFO L242 Difference]: Finished difference. Result has 670 places, 976 transitions, 17046 flow [2021-11-19 05:14:09,164 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15655, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=842, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=17046, PETRI_PLACES=670, PETRI_TRANSITIONS=976} [2021-11-19 05:14:09,165 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 582 predicate places. [2021-11-19 05:14:09,165 INFO L470 AbstractCegarLoop]: Abstraction has has 670 places, 976 transitions, 17046 flow [2021-11-19 05:14:09,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:09,165 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:09,165 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:09,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-11-19 05:14:09,165 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1872430838, now seen corresponding path program 171 times [2021-11-19 05:14:09,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:09,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204112346] [2021-11-19 05:14:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:09,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:09,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:09,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204112346] [2021-11-19 05:14:09,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204112346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:09,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:09,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:09,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459272758] [2021-11-19 05:14:09,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:09,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:09,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:09,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:09,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 976 transitions, 17046 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:09,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:09,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:09,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:12,501 INFO L129 PetriNetUnfolder]: 756/2278 cut-off events. [2021-11-19 05:14:12,501 INFO L130 PetriNetUnfolder]: For 105391/105391 co-relation queries the response was YES. [2021-11-19 05:14:12,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22774 conditions, 2278 events. 756/2278 cut-off events. For 105391/105391 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17644 event pairs, 48 based on Foata normal form. 1/2276 useless extension candidates. Maximal degree in co-relation 22519. Up to 1611 conditions per place. [2021-11-19 05:14:12,567 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 826 selfloop transitions, 139 changer transitions 27/1031 dead transitions. [2021-11-19 05:14:12,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 1031 transitions, 20270 flow [2021-11-19 05:14:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:14:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:14:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1757 transitions. [2021-11-19 05:14:12,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664087685364281 [2021-11-19 05:14:12,569 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1757 transitions. [2021-11-19 05:14:12,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1757 transitions. [2021-11-19 05:14:12,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:12,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1757 transitions. [2021-11-19 05:14:12,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.24242424242424) internal successors, (1757), 33 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:12,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:12,572 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:12,572 INFO L186 Difference]: Start difference. First operand has 670 places, 976 transitions, 17046 flow. Second operand 33 states and 1757 transitions. [2021-11-19 05:14:12,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 1031 transitions, 20270 flow [2021-11-19 05:14:13,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1031 transitions, 19275 flow, removed 444 selfloop flow, removed 17 redundant places. [2021-11-19 05:14:13,622 INFO L242 Difference]: Finished difference. Result has 689 places, 979 transitions, 16581 flow [2021-11-19 05:14:13,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16059, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16581, PETRI_PLACES=689, PETRI_TRANSITIONS=979} [2021-11-19 05:14:13,623 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 601 predicate places. [2021-11-19 05:14:13,623 INFO L470 AbstractCegarLoop]: Abstraction has has 689 places, 979 transitions, 16581 flow [2021-11-19 05:14:13,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:13,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:13,623 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:13,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-11-19 05:14:13,623 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1400507958, now seen corresponding path program 172 times [2021-11-19 05:14:13,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:13,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993694289] [2021-11-19 05:14:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:13,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:14,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:14,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993694289] [2021-11-19 05:14:14,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993694289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:14,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:14,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:14,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104029211] [2021-11-19 05:14:14,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:14,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:14,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:14,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:14,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 979 transitions, 16581 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:14,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:14,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:14,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:17,407 INFO L129 PetriNetUnfolder]: 764/2313 cut-off events. [2021-11-19 05:14:17,408 INFO L130 PetriNetUnfolder]: For 110037/110037 co-relation queries the response was YES. [2021-11-19 05:14:17,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22892 conditions, 2313 events. 764/2313 cut-off events. For 110037/110037 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 18048 event pairs, 45 based on Foata normal form. 1/2311 useless extension candidates. Maximal degree in co-relation 22630. Up to 1696 conditions per place. [2021-11-19 05:14:17,487 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 861 selfloop transitions, 124 changer transitions 21/1045 dead transitions. [2021-11-19 05:14:17,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1045 transitions, 20344 flow [2021-11-19 05:14:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:14:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:14:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2075 transitions. [2021-11-19 05:14:17,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5660120021822149 [2021-11-19 05:14:17,489 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2075 transitions. [2021-11-19 05:14:17,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2075 transitions. [2021-11-19 05:14:17,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:17,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2075 transitions. [2021-11-19 05:14:17,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.205128205128204) internal successors, (2075), 39 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:17,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:17,495 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:17,495 INFO L186 Difference]: Start difference. First operand has 689 places, 979 transitions, 16581 flow. Second operand 39 states and 2075 transitions. [2021-11-19 05:14:17,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1045 transitions, 20344 flow [2021-11-19 05:14:18,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1045 transitions, 19883 flow, removed 135 selfloop flow, removed 28 redundant places. [2021-11-19 05:14:18,633 INFO L242 Difference]: Finished difference. Result has 699 places, 1000 transitions, 17259 flow [2021-11-19 05:14:18,634 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16176, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=866, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=17259, PETRI_PLACES=699, PETRI_TRANSITIONS=1000} [2021-11-19 05:14:18,635 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 611 predicate places. [2021-11-19 05:14:18,635 INFO L470 AbstractCegarLoop]: Abstraction has has 699 places, 1000 transitions, 17259 flow [2021-11-19 05:14:18,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:18,635 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:18,636 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:18,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-11-19 05:14:18,636 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash 995889006, now seen corresponding path program 173 times [2021-11-19 05:14:18,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:18,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448411225] [2021-11-19 05:14:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:18,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:19,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:19,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448411225] [2021-11-19 05:14:19,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448411225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:19,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:19,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:19,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391091109] [2021-11-19 05:14:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:19,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:19,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:19,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:19,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 1000 transitions, 17259 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:19,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:19,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:19,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:22,225 INFO L129 PetriNetUnfolder]: 767/2323 cut-off events. [2021-11-19 05:14:22,225 INFO L130 PetriNetUnfolder]: For 116051/116051 co-relation queries the response was YES. [2021-11-19 05:14:22,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23176 conditions, 2323 events. 767/2323 cut-off events. For 116051/116051 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 18157 event pairs, 46 based on Foata normal form. 1/2321 useless extension candidates. Maximal degree in co-relation 22915. Up to 1717 conditions per place. [2021-11-19 05:14:22,302 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 878 selfloop transitions, 117 changer transitions 20/1054 dead transitions. [2021-11-19 05:14:22,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 1054 transitions, 20401 flow [2021-11-19 05:14:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:14:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:14:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1812 transitions. [2021-11-19 05:14:22,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5669586983729662 [2021-11-19 05:14:22,313 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1812 transitions. [2021-11-19 05:14:22,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1812 transitions. [2021-11-19 05:14:22,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:22,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1812 transitions. [2021-11-19 05:14:22,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.294117647058826) internal successors, (1812), 34 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:22,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:22,321 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:22,321 INFO L186 Difference]: Start difference. First operand has 699 places, 1000 transitions, 17259 flow. Second operand 34 states and 1812 transitions. [2021-11-19 05:14:22,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 1054 transitions, 20401 flow [2021-11-19 05:14:23,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 1054 transitions, 19651 flow, removed 305 selfloop flow, removed 24 redundant places. [2021-11-19 05:14:23,625 INFO L242 Difference]: Finished difference. Result has 713 places, 1015 transitions, 17171 flow [2021-11-19 05:14:23,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16519, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=17171, PETRI_PLACES=713, PETRI_TRANSITIONS=1015} [2021-11-19 05:14:23,627 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 625 predicate places. [2021-11-19 05:14:23,627 INFO L470 AbstractCegarLoop]: Abstraction has has 713 places, 1015 transitions, 17171 flow [2021-11-19 05:14:23,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:23,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:23,627 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:23,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-11-19 05:14:23,627 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:23,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1454365000, now seen corresponding path program 174 times [2021-11-19 05:14:23,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:23,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97330248] [2021-11-19 05:14:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:23,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:24,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:24,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97330248] [2021-11-19 05:14:24,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97330248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:24,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:24,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:24,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247293800] [2021-11-19 05:14:24,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:24,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:24,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:24,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:24,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 1015 transitions, 17171 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:24,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:24,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:24,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:27,554 INFO L129 PetriNetUnfolder]: 779/2358 cut-off events. [2021-11-19 05:14:27,554 INFO L130 PetriNetUnfolder]: For 117879/117879 co-relation queries the response was YES. [2021-11-19 05:14:27,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23355 conditions, 2358 events. 779/2358 cut-off events. For 117879/117879 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18536 event pairs, 45 based on Foata normal form. 1/2356 useless extension candidates. Maximal degree in co-relation 23085. Up to 1705 conditions per place. [2021-11-19 05:14:27,622 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 878 selfloop transitions, 149 changer transitions 22/1088 dead transitions. [2021-11-19 05:14:27,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 1088 transitions, 20664 flow [2021-11-19 05:14:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:14:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:14:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1715 transitions. [2021-11-19 05:14:27,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5701462765957447 [2021-11-19 05:14:27,624 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1715 transitions. [2021-11-19 05:14:27,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1715 transitions. [2021-11-19 05:14:27,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:27,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1715 transitions. [2021-11-19 05:14:27,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.59375) internal successors, (1715), 32 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:27,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:27,628 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:27,629 INFO L186 Difference]: Start difference. First operand has 713 places, 1015 transitions, 17171 flow. Second operand 32 states and 1715 transitions. [2021-11-19 05:14:27,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 1088 transitions, 20664 flow [2021-11-19 05:14:28,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 1088 transitions, 20187 flow, removed 150 selfloop flow, removed 25 redundant places. [2021-11-19 05:14:28,846 INFO L242 Difference]: Finished difference. Result has 721 places, 1037 transitions, 17533 flow [2021-11-19 05:14:28,847 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16712, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17533, PETRI_PLACES=721, PETRI_TRANSITIONS=1037} [2021-11-19 05:14:28,847 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 633 predicate places. [2021-11-19 05:14:28,847 INFO L470 AbstractCegarLoop]: Abstraction has has 721 places, 1037 transitions, 17533 flow [2021-11-19 05:14:28,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:28,848 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:28,848 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:28,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-11-19 05:14:28,848 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash 747599534, now seen corresponding path program 175 times [2021-11-19 05:14:28,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:28,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26152197] [2021-11-19 05:14:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:28,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:29,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:29,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26152197] [2021-11-19 05:14:29,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26152197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:29,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:29,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:29,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126413479] [2021-11-19 05:14:29,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:29,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:29,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:29,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:29,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 1037 transitions, 17533 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:29,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:29,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:29,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:32,674 INFO L129 PetriNetUnfolder]: 778/2374 cut-off events. [2021-11-19 05:14:32,675 INFO L130 PetriNetUnfolder]: For 121992/121992 co-relation queries the response was YES. [2021-11-19 05:14:32,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23674 conditions, 2374 events. 778/2374 cut-off events. For 121992/121992 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18724 event pairs, 46 based on Foata normal form. 1/2372 useless extension candidates. Maximal degree in co-relation 23402. Up to 1697 conditions per place. [2021-11-19 05:14:32,762 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 854 selfloop transitions, 178 changer transitions 18/1089 dead transitions. [2021-11-19 05:14:32,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 1089 transitions, 21149 flow [2021-11-19 05:14:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:14:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:14:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1871 transitions. [2021-11-19 05:14:32,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568693009118541 [2021-11-19 05:14:32,764 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1871 transitions. [2021-11-19 05:14:32,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1871 transitions. [2021-11-19 05:14:32,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:32,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1871 transitions. [2021-11-19 05:14:32,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.457142857142856) internal successors, (1871), 35 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:32,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:32,768 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:32,769 INFO L186 Difference]: Start difference. First operand has 721 places, 1037 transitions, 17533 flow. Second operand 35 states and 1871 transitions. [2021-11-19 05:14:32,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 1089 transitions, 21149 flow [2021-11-19 05:14:34,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 1089 transitions, 20424 flow, removed 279 selfloop flow, removed 27 redundant places. [2021-11-19 05:14:34,208 INFO L242 Difference]: Finished difference. Result has 731 places, 1050 transitions, 18030 flow [2021-11-19 05:14:34,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17126, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18030, PETRI_PLACES=731, PETRI_TRANSITIONS=1050} [2021-11-19 05:14:34,209 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 643 predicate places. [2021-11-19 05:14:34,209 INFO L470 AbstractCegarLoop]: Abstraction has has 731 places, 1050 transitions, 18030 flow [2021-11-19 05:14:34,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:34,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:34,210 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:34,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-11-19 05:14:34,210 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:34,210 INFO L85 PathProgramCache]: Analyzing trace with hash -536015352, now seen corresponding path program 176 times [2021-11-19 05:14:34,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:34,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998099549] [2021-11-19 05:14:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:34,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:34,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:34,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998099549] [2021-11-19 05:14:34,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998099549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:34,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:34,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:34,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351305154] [2021-11-19 05:14:34,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:34,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:34,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:34,601 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:34,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 1050 transitions, 18030 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:34,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:34,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:34,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:37,880 INFO L129 PetriNetUnfolder]: 781/2371 cut-off events. [2021-11-19 05:14:37,880 INFO L130 PetriNetUnfolder]: For 117558/117558 co-relation queries the response was YES. [2021-11-19 05:14:37,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23781 conditions, 2371 events. 781/2371 cut-off events. For 117558/117558 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18689 event pairs, 41 based on Foata normal form. 1/2370 useless extension candidates. Maximal degree in co-relation 23506. Up to 1738 conditions per place. [2021-11-19 05:14:37,973 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 892 selfloop transitions, 147 changer transitions 20/1098 dead transitions. [2021-11-19 05:14:37,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 1098 transitions, 21327 flow [2021-11-19 05:14:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:14:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:14:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1868 transitions. [2021-11-19 05:14:37,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5677811550151975 [2021-11-19 05:14:37,975 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1868 transitions. [2021-11-19 05:14:37,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1868 transitions. [2021-11-19 05:14:37,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:37,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1868 transitions. [2021-11-19 05:14:37,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.371428571428574) internal successors, (1868), 35 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:37,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:37,980 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:37,980 INFO L186 Difference]: Start difference. First operand has 731 places, 1050 transitions, 18030 flow. Second operand 35 states and 1868 transitions. [2021-11-19 05:14:37,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 1098 transitions, 21327 flow [2021-11-19 05:14:39,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1098 transitions, 20844 flow, removed 172 selfloop flow, removed 24 redundant places. [2021-11-19 05:14:39,492 INFO L242 Difference]: Finished difference. Result has 746 places, 1059 transitions, 18279 flow [2021-11-19 05:14:39,492 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17575, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=908, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18279, PETRI_PLACES=746, PETRI_TRANSITIONS=1059} [2021-11-19 05:14:39,493 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 658 predicate places. [2021-11-19 05:14:39,493 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 1059 transitions, 18279 flow [2021-11-19 05:14:39,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:39,494 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:39,494 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-11-19 05:14:39,495 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash -316253520, now seen corresponding path program 177 times [2021-11-19 05:14:39,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:39,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201776192] [2021-11-19 05:14:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:39,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:39,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:39,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201776192] [2021-11-19 05:14:39,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201776192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:39,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:39,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:39,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425270742] [2021-11-19 05:14:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:39,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:39,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:39,965 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:39,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 1059 transitions, 18279 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:39,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:39,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:39,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:43,387 INFO L129 PetriNetUnfolder]: 776/2357 cut-off events. [2021-11-19 05:14:43,388 INFO L130 PetriNetUnfolder]: For 116389/116389 co-relation queries the response was YES. [2021-11-19 05:14:43,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23666 conditions, 2357 events. 776/2357 cut-off events. For 116389/116389 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18544 event pairs, 40 based on Foata normal form. 1/2356 useless extension candidates. Maximal degree in co-relation 23384. Up to 1758 conditions per place. [2021-11-19 05:14:43,469 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 921 selfloop transitions, 110 changer transitions 22/1092 dead transitions. [2021-11-19 05:14:43,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 1092 transitions, 20868 flow [2021-11-19 05:14:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:14:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:14:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1656 transitions. [2021-11-19 05:14:43,470 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5682910089224433 [2021-11-19 05:14:43,470 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1656 transitions. [2021-11-19 05:14:43,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1656 transitions. [2021-11-19 05:14:43,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:43,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1656 transitions. [2021-11-19 05:14:43,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.41935483870968) internal successors, (1656), 31 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:43,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:43,474 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:43,474 INFO L186 Difference]: Start difference. First operand has 746 places, 1059 transitions, 18279 flow. Second operand 31 states and 1656 transitions. [2021-11-19 05:14:43,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 1092 transitions, 20868 flow [2021-11-19 05:14:44,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 1092 transitions, 20326 flow, removed 160 selfloop flow, removed 29 redundant places. [2021-11-19 05:14:44,774 INFO L242 Difference]: Finished difference. Result has 749 places, 1052 transitions, 17964 flow [2021-11-19 05:14:44,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17751, PETRI_DIFFERENCE_MINUEND_PLACES=711, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=949, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17964, PETRI_PLACES=749, PETRI_TRANSITIONS=1052} [2021-11-19 05:14:44,775 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 661 predicate places. [2021-11-19 05:14:44,775 INFO L470 AbstractCegarLoop]: Abstraction has has 749 places, 1052 transitions, 17964 flow [2021-11-19 05:14:44,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:44,775 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:44,775 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:44,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-11-19 05:14:44,776 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 710777806, now seen corresponding path program 178 times [2021-11-19 05:14:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:44,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768374224] [2021-11-19 05:14:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:45,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:45,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768374224] [2021-11-19 05:14:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768374224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:45,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:45,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:14:45,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894038540] [2021-11-19 05:14:45,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:45,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:14:45,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:14:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:14:45,186 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:45,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 1052 transitions, 17964 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:45,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:45,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:45,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:48,302 INFO L129 PetriNetUnfolder]: 771/2362 cut-off events. [2021-11-19 05:14:48,302 INFO L130 PetriNetUnfolder]: For 108604/108604 co-relation queries the response was YES. [2021-11-19 05:14:48,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23319 conditions, 2362 events. 771/2362 cut-off events. For 108604/108604 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18608 event pairs, 47 based on Foata normal form. 1/2360 useless extension candidates. Maximal degree in co-relation 23040. Up to 1731 conditions per place. [2021-11-19 05:14:48,401 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 903 selfloop transitions, 120 changer transitions 21/1083 dead transitions. [2021-11-19 05:14:48,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 1083 transitions, 20495 flow [2021-11-19 05:14:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:14:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:14:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1708 transitions. [2021-11-19 05:14:48,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5678191489361702 [2021-11-19 05:14:48,403 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1708 transitions. [2021-11-19 05:14:48,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1708 transitions. [2021-11-19 05:14:48,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:48,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1708 transitions. [2021-11-19 05:14:48,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.375) internal successors, (1708), 32 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:48,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:48,407 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:48,407 INFO L186 Difference]: Start difference. First operand has 749 places, 1052 transitions, 17964 flow. Second operand 32 states and 1708 transitions. [2021-11-19 05:14:48,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 1083 transitions, 20495 flow [2021-11-19 05:14:49,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 1083 transitions, 20197 flow, removed 26 selfloop flow, removed 31 redundant places. [2021-11-19 05:14:49,565 INFO L242 Difference]: Finished difference. Result has 746 places, 1045 transitions, 17928 flow [2021-11-19 05:14:49,566 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17690, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17928, PETRI_PLACES=746, PETRI_TRANSITIONS=1045} [2021-11-19 05:14:49,566 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 658 predicate places. [2021-11-19 05:14:49,567 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 1045 transitions, 17928 flow [2021-11-19 05:14:49,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:49,567 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:49,567 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:49,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-11-19 05:14:49,568 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash 856811994, now seen corresponding path program 179 times [2021-11-19 05:14:49,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:49,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931894309] [2021-11-19 05:14:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:49,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:50,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:50,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931894309] [2021-11-19 05:14:50,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931894309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:50,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:50,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:14:50,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528132516] [2021-11-19 05:14:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:14:50,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:14:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:14:50,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:50,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 1045 transitions, 17928 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:50,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:50,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:50,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:54,122 INFO L129 PetriNetUnfolder]: 780/2380 cut-off events. [2021-11-19 05:14:54,122 INFO L130 PetriNetUnfolder]: For 110715/110715 co-relation queries the response was YES. [2021-11-19 05:14:54,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23705 conditions, 2380 events. 780/2380 cut-off events. For 110715/110715 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18799 event pairs, 45 based on Foata normal form. 1/2377 useless extension candidates. Maximal degree in co-relation 23427. Up to 1749 conditions per place. [2021-11-19 05:14:54,193 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 924 selfloop transitions, 108 changer transitions 23/1094 dead transitions. [2021-11-19 05:14:54,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 1094 transitions, 21144 flow [2021-11-19 05:14:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:14:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:14:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1950 transitions. [2021-11-19 05:14:54,195 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606670500287522 [2021-11-19 05:14:54,195 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1950 transitions. [2021-11-19 05:14:54,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1950 transitions. [2021-11-19 05:14:54,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:54,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1950 transitions. [2021-11-19 05:14:54,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.7027027027027) internal successors, (1950), 37 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:54,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:54,200 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:54,200 INFO L186 Difference]: Start difference. First operand has 746 places, 1045 transitions, 17928 flow. Second operand 37 states and 1950 transitions. [2021-11-19 05:14:54,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 1094 transitions, 21144 flow [2021-11-19 05:14:55,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 1094 transitions, 20839 flow, removed 18 selfloop flow, removed 32 redundant places. [2021-11-19 05:14:55,407 INFO L242 Difference]: Finished difference. Result has 750 places, 1054 transitions, 18205 flow [2021-11-19 05:14:55,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17637, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=938, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18205, PETRI_PLACES=750, PETRI_TRANSITIONS=1054} [2021-11-19 05:14:55,408 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 662 predicate places. [2021-11-19 05:14:55,409 INFO L470 AbstractCegarLoop]: Abstraction has has 750 places, 1054 transitions, 18205 flow [2021-11-19 05:14:55,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:55,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:14:55,409 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:14:55,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-11-19 05:14:55,409 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:14:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:14:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -550256612, now seen corresponding path program 180 times [2021-11-19 05:14:55,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:14:55,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325171210] [2021-11-19 05:14:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:14:55,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:14:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:14:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:14:55,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:14:55,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325171210] [2021-11-19 05:14:55,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325171210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:14:55,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:14:55,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:14:55,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109611170] [2021-11-19 05:14:55,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:14:55,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:14:55,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:14:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:14:55,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:14:55,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:14:55,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1054 transitions, 18205 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:55,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:14:55,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:14:55,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:14:59,519 INFO L129 PetriNetUnfolder]: 777/2391 cut-off events. [2021-11-19 05:14:59,520 INFO L130 PetriNetUnfolder]: For 117434/117434 co-relation queries the response was YES. [2021-11-19 05:14:59,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24027 conditions, 2391 events. 777/2391 cut-off events. For 117434/117434 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18962 event pairs, 51 based on Foata normal form. 1/2389 useless extension candidates. Maximal degree in co-relation 23748. Up to 1701 conditions per place. [2021-11-19 05:14:59,616 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 856 selfloop transitions, 190 changer transitions 20/1105 dead transitions. [2021-11-19 05:14:59,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1105 transitions, 21600 flow [2021-11-19 05:14:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:14:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-19 05:14:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2174 transitions. [2021-11-19 05:14:59,632 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5640892579138558 [2021-11-19 05:14:59,632 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2174 transitions. [2021-11-19 05:14:59,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2174 transitions. [2021-11-19 05:14:59,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:14:59,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2174 transitions. [2021-11-19 05:14:59,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 53.02439024390244) internal successors, (2174), 41 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:59,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:59,640 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:14:59,641 INFO L186 Difference]: Start difference. First operand has 750 places, 1054 transitions, 18205 flow. Second operand 41 states and 2174 transitions. [2021-11-19 05:14:59,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1105 transitions, 21600 flow [2021-11-19 05:15:00,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 1105 transitions, 21251 flow, removed 108 selfloop flow, removed 30 redundant places. [2021-11-19 05:15:00,887 INFO L242 Difference]: Finished difference. Result has 765 places, 1065 transitions, 18743 flow [2021-11-19 05:15:00,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17880, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=18743, PETRI_PLACES=765, PETRI_TRANSITIONS=1065} [2021-11-19 05:15:00,888 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 677 predicate places. [2021-11-19 05:15:00,889 INFO L470 AbstractCegarLoop]: Abstraction has has 765 places, 1065 transitions, 18743 flow [2021-11-19 05:15:00,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:00,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:00,889 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:00,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-11-19 05:15:00,889 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1106941784, now seen corresponding path program 181 times [2021-11-19 05:15:00,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:00,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94934766] [2021-11-19 05:15:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:00,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:01,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:01,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94934766] [2021-11-19 05:15:01,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94934766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:01,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:01,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:15:01,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583811976] [2021-11-19 05:15:01,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:01,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:15:01,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:15:01,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:15:01,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:01,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 1065 transitions, 18743 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:01,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:01,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:01,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:04,668 INFO L129 PetriNetUnfolder]: 786/2392 cut-off events. [2021-11-19 05:15:04,668 INFO L130 PetriNetUnfolder]: For 119241/119241 co-relation queries the response was YES. [2021-11-19 05:15:04,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24528 conditions, 2392 events. 786/2392 cut-off events. For 119241/119241 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 19031 event pairs, 39 based on Foata normal form. 1/2390 useless extension candidates. Maximal degree in co-relation 24244. Up to 1674 conditions per place. [2021-11-19 05:15:04,758 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 881 selfloop transitions, 177 changer transitions 26/1123 dead transitions. [2021-11-19 05:15:04,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 794 places, 1123 transitions, 22284 flow [2021-11-19 05:15:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:15:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:15:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1912 transitions. [2021-11-19 05:15:04,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5650118203309693 [2021-11-19 05:15:04,761 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1912 transitions. [2021-11-19 05:15:04,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1912 transitions. [2021-11-19 05:15:04,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:04,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1912 transitions. [2021-11-19 05:15:04,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.111111111111114) internal successors, (1912), 36 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:04,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:04,765 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:04,765 INFO L186 Difference]: Start difference. First operand has 765 places, 1065 transitions, 18743 flow. Second operand 36 states and 1912 transitions. [2021-11-19 05:15:04,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 794 places, 1123 transitions, 22284 flow [2021-11-19 05:15:05,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 1123 transitions, 21667 flow, removed 178 selfloop flow, removed 31 redundant places. [2021-11-19 05:15:05,919 INFO L242 Difference]: Finished difference. Result has 774 places, 1072 transitions, 18873 flow [2021-11-19 05:15:05,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18150, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=18873, PETRI_PLACES=774, PETRI_TRANSITIONS=1072} [2021-11-19 05:15:05,920 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 686 predicate places. [2021-11-19 05:15:05,921 INFO L470 AbstractCegarLoop]: Abstraction has has 774 places, 1072 transitions, 18873 flow [2021-11-19 05:15:05,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:05,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:05,921 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:05,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-11-19 05:15:05,922 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:05,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:05,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1250381102, now seen corresponding path program 182 times [2021-11-19 05:15:05,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:05,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223819751] [2021-11-19 05:15:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:05,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:06,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:06,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223819751] [2021-11-19 05:15:06,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223819751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:06,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:06,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 05:15:06,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677536871] [2021-11-19 05:15:06,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:06,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:15:06,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:15:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:15:06,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:06,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 1072 transitions, 18873 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:06,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:06,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:06,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:10,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:15:12,370 INFO L129 PetriNetUnfolder]: 777/2391 cut-off events. [2021-11-19 05:15:12,370 INFO L130 PetriNetUnfolder]: For 112417/112417 co-relation queries the response was YES. [2021-11-19 05:15:12,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23989 conditions, 2391 events. 777/2391 cut-off events. For 112417/112417 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19052 event pairs, 44 based on Foata normal form. 1/2389 useless extension candidates. Maximal degree in co-relation 23702. Up to 1768 conditions per place. [2021-11-19 05:15:12,448 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 943 selfloop transitions, 99 changer transitions 21/1102 dead transitions. [2021-11-19 05:15:12,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 1102 transitions, 21424 flow [2021-11-19 05:15:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:15:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:15:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1841 transitions. [2021-11-19 05:15:12,450 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2021-11-19 05:15:12,451 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1841 transitions. [2021-11-19 05:15:12,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1841 transitions. [2021-11-19 05:15:12,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:12,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1841 transitions. [2021-11-19 05:15:12,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.6) internal successors, (1841), 35 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:12,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:12,455 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:12,455 INFO L186 Difference]: Start difference. First operand has 774 places, 1072 transitions, 18873 flow. Second operand 35 states and 1841 transitions. [2021-11-19 05:15:12,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 1102 transitions, 21424 flow [2021-11-19 05:15:13,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 774 places, 1102 transitions, 21112 flow, removed 72 selfloop flow, removed 27 redundant places. [2021-11-19 05:15:13,677 INFO L242 Difference]: Finished difference. Result has 781 places, 1066 transitions, 18696 flow [2021-11-19 05:15:13,677 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18581, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=973, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18696, PETRI_PLACES=781, PETRI_TRANSITIONS=1066} [2021-11-19 05:15:13,677 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 693 predicate places. [2021-11-19 05:15:13,678 INFO L470 AbstractCegarLoop]: Abstraction has has 781 places, 1066 transitions, 18696 flow [2021-11-19 05:15:13,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:13,678 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:13,678 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:13,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-11-19 05:15:13,678 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash -325894790, now seen corresponding path program 183 times [2021-11-19 05:15:13,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:13,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936419253] [2021-11-19 05:15:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:13,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:14,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:14,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936419253] [2021-11-19 05:15:14,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936419253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:14,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:14,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:15:14,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299570827] [2021-11-19 05:15:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:14,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:15:14,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:15:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:15:14,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:14,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 1066 transitions, 18696 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:14,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:14,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:14,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:17,785 INFO L129 PetriNetUnfolder]: 772/2375 cut-off events. [2021-11-19 05:15:17,785 INFO L130 PetriNetUnfolder]: For 110528/110528 co-relation queries the response was YES. [2021-11-19 05:15:17,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23858 conditions, 2375 events. 772/2375 cut-off events. For 110528/110528 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18785 event pairs, 47 based on Foata normal form. 1/2372 useless extension candidates. Maximal degree in co-relation 23571. Up to 1757 conditions per place. [2021-11-19 05:15:17,840 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 940 selfloop transitions, 100 changer transitions 19/1098 dead transitions. [2021-11-19 05:15:17,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 1098 transitions, 21445 flow [2021-11-19 05:15:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:15:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:15:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1989 transitions. [2021-11-19 05:15:17,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5568309070548713 [2021-11-19 05:15:17,841 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1989 transitions. [2021-11-19 05:15:17,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1989 transitions. [2021-11-19 05:15:17,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:17,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1989 transitions. [2021-11-19 05:15:17,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.3421052631579) internal successors, (1989), 38 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:17,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:17,845 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:17,845 INFO L186 Difference]: Start difference. First operand has 781 places, 1066 transitions, 18696 flow. Second operand 38 states and 1989 transitions. [2021-11-19 05:15:17,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 1098 transitions, 21445 flow [2021-11-19 05:15:18,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 772 places, 1098 transitions, 21078 flow, removed 31 selfloop flow, removed 38 redundant places. [2021-11-19 05:15:18,907 INFO L242 Difference]: Finished difference. Result has 780 places, 1064 transitions, 18622 flow [2021-11-19 05:15:18,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18349, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=18622, PETRI_PLACES=780, PETRI_TRANSITIONS=1064} [2021-11-19 05:15:18,908 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 692 predicate places. [2021-11-19 05:15:18,908 INFO L470 AbstractCegarLoop]: Abstraction has has 780 places, 1064 transitions, 18622 flow [2021-11-19 05:15:18,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:18,908 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:18,909 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:18,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-11-19 05:15:18,909 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash -27944376, now seen corresponding path program 184 times [2021-11-19 05:15:18,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:18,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596856940] [2021-11-19 05:15:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:18,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:19,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:19,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596856940] [2021-11-19 05:15:19,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596856940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:19,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:19,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:15:19,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522667454] [2021-11-19 05:15:19,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:19,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:15:19,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:15:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:15:19,285 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:19,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 1064 transitions, 18622 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:19,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:19,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:19,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:22,995 INFO L129 PetriNetUnfolder]: 779/2379 cut-off events. [2021-11-19 05:15:22,995 INFO L130 PetriNetUnfolder]: For 115271/115271 co-relation queries the response was YES. [2021-11-19 05:15:23,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 2379 events. 779/2379 cut-off events. For 115271/115271 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18894 event pairs, 39 based on Foata normal form. 1/2378 useless extension candidates. Maximal degree in co-relation 23997. Up to 1599 conditions per place. [2021-11-19 05:15:23,081 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 823 selfloop transitions, 232 changer transitions 26/1120 dead transitions. [2021-11-19 05:15:23,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 1120 transitions, 22170 flow [2021-11-19 05:15:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:15:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-19 05:15:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2320 transitions. [2021-11-19 05:15:23,083 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5609284332688588 [2021-11-19 05:15:23,084 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2320 transitions. [2021-11-19 05:15:23,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2320 transitions. [2021-11-19 05:15:23,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:23,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2320 transitions. [2021-11-19 05:15:23,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.72727272727273) internal successors, (2320), 44 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:23,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:23,088 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:23,088 INFO L186 Difference]: Start difference. First operand has 780 places, 1064 transitions, 18622 flow. Second operand 44 states and 2320 transitions. [2021-11-19 05:15:23,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 1120 transitions, 22170 flow [2021-11-19 05:15:24,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 779 places, 1120 transitions, 21813 flow, removed 66 selfloop flow, removed 37 redundant places. [2021-11-19 05:15:24,244 INFO L242 Difference]: Finished difference. Result has 789 places, 1067 transitions, 19074 flow [2021-11-19 05:15:24,246 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18307, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19074, PETRI_PLACES=789, PETRI_TRANSITIONS=1067} [2021-11-19 05:15:24,246 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 701 predicate places. [2021-11-19 05:15:24,246 INFO L470 AbstractCegarLoop]: Abstraction has has 789 places, 1067 transitions, 19074 flow [2021-11-19 05:15:24,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:24,247 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:24,247 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:24,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-11-19 05:15:24,247 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash 424151862, now seen corresponding path program 185 times [2021-11-19 05:15:24,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:24,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099768230] [2021-11-19 05:15:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:24,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:24,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:24,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099768230] [2021-11-19 05:15:24,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099768230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:24,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:24,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:15:24,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300758418] [2021-11-19 05:15:24,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:24,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:15:24,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:15:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:15:24,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:24,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 1067 transitions, 19074 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:24,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:24,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:24,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:27,559 INFO L129 PetriNetUnfolder]: 768/2363 cut-off events. [2021-11-19 05:15:27,559 INFO L130 PetriNetUnfolder]: For 112001/112001 co-relation queries the response was YES. [2021-11-19 05:15:27,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24011 conditions, 2363 events. 768/2363 cut-off events. For 112001/112001 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18720 event pairs, 51 based on Foata normal form. 1/2361 useless extension candidates. Maximal degree in co-relation 23724. Up to 1709 conditions per place. [2021-11-19 05:15:27,637 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 891 selfloop transitions, 147 changer transitions 21/1098 dead transitions. [2021-11-19 05:15:27,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 819 places, 1098 transitions, 21645 flow [2021-11-19 05:15:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:15:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:15:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2015 transitions. [2021-11-19 05:15:27,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5641097424412094 [2021-11-19 05:15:27,639 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2015 transitions. [2021-11-19 05:15:27,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2015 transitions. [2021-11-19 05:15:27,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:27,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2015 transitions. [2021-11-19 05:15:27,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 53.026315789473685) internal successors, (2015), 38 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:27,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:27,643 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:27,643 INFO L186 Difference]: Start difference. First operand has 789 places, 1067 transitions, 19074 flow. Second operand 38 states and 2015 transitions. [2021-11-19 05:15:27,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 819 places, 1098 transitions, 21645 flow [2021-11-19 05:15:28,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 1098 transitions, 21190 flow, removed 69 selfloop flow, removed 39 redundant places. [2021-11-19 05:15:28,739 INFO L242 Difference]: Finished difference. Result has 788 places, 1060 transitions, 18922 flow [2021-11-19 05:15:28,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18629, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=18922, PETRI_PLACES=788, PETRI_TRANSITIONS=1060} [2021-11-19 05:15:28,740 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 700 predicate places. [2021-11-19 05:15:28,740 INFO L470 AbstractCegarLoop]: Abstraction has has 788 places, 1060 transitions, 18922 flow [2021-11-19 05:15:28,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:28,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:28,740 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:28,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-11-19 05:15:28,741 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash -350032370, now seen corresponding path program 186 times [2021-11-19 05:15:28,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:28,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32234844] [2021-11-19 05:15:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:28,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:29,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:29,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32234844] [2021-11-19 05:15:29,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32234844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:29,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:29,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:15:29,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756631594] [2021-11-19 05:15:29,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:29,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:15:29,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:15:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:15:29,231 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:29,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1060 transitions, 18922 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:29,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:29,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:29,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:32,255 INFO L129 PetriNetUnfolder]: 767/2356 cut-off events. [2021-11-19 05:15:32,255 INFO L130 PetriNetUnfolder]: For 108977/108977 co-relation queries the response was YES. [2021-11-19 05:15:32,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24020 conditions, 2356 events. 767/2356 cut-off events. For 108977/108977 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18710 event pairs, 46 based on Foata normal form. 1/2354 useless extension candidates. Maximal degree in co-relation 23733. Up to 1615 conditions per place. [2021-11-19 05:15:32,327 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 881 selfloop transitions, 182 changer transitions 20/1122 dead transitions. [2021-11-19 05:15:32,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 1122 transitions, 22531 flow [2021-11-19 05:15:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:15:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-19 05:15:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1707 transitions. [2021-11-19 05:15:32,329 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5674867021276596 [2021-11-19 05:15:32,329 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1707 transitions. [2021-11-19 05:15:32,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1707 transitions. [2021-11-19 05:15:32,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:32,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1707 transitions. [2021-11-19 05:15:32,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.34375) internal successors, (1707), 32 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:32,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:32,333 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:32,333 INFO L186 Difference]: Start difference. First operand has 788 places, 1060 transitions, 18922 flow. Second operand 32 states and 1707 transitions. [2021-11-19 05:15:32,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 1122 transitions, 22531 flow [2021-11-19 05:15:33,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 1122 transitions, 22131 flow, removed 30 selfloop flow, removed 39 redundant places. [2021-11-19 05:15:33,395 INFO L242 Difference]: Finished difference. Result has 776 places, 1068 transitions, 19356 flow [2021-11-19 05:15:33,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18560, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19356, PETRI_PLACES=776, PETRI_TRANSITIONS=1068} [2021-11-19 05:15:33,396 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 688 predicate places. [2021-11-19 05:15:33,397 INFO L470 AbstractCegarLoop]: Abstraction has has 776 places, 1068 transitions, 19356 flow [2021-11-19 05:15:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:33,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:33,397 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, 1, 1] [2021-11-19 05:15:33,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-11-19 05:15:33,398 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1558472126, now seen corresponding path program 187 times [2021-11-19 05:15:33,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:33,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885390942] [2021-11-19 05:15:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:33,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:33,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:33,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885390942] [2021-11-19 05:15:33,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885390942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:33,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:33,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 05:15:33,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886108676] [2021-11-19 05:15:33,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:33,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:15:33,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:33,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:15:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:15:33,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:34,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 1068 transitions, 19356 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:34,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:34,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:34,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:38,580 INFO L129 PetriNetUnfolder]: 763/2323 cut-off events. [2021-11-19 05:15:38,580 INFO L130 PetriNetUnfolder]: For 108077/108077 co-relation queries the response was YES. [2021-11-19 05:15:38,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23780 conditions, 2323 events. 763/2323 cut-off events. For 108077/108077 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18265 event pairs, 53 based on Foata normal form. 1/2321 useless extension candidates. Maximal degree in co-relation 23496. Up to 1745 conditions per place. [2021-11-19 05:15:38,667 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 943 selfloop transitions, 75 changer transitions 34/1091 dead transitions. [2021-11-19 05:15:38,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 1091 transitions, 21652 flow [2021-11-19 05:15:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:15:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-19 05:15:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1833 transitions. [2021-11-19 05:15:38,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2021-11-19 05:15:38,669 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1833 transitions. [2021-11-19 05:15:38,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1833 transitions. [2021-11-19 05:15:38,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:38,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1833 transitions. [2021-11-19 05:15:38,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.371428571428574) internal successors, (1833), 35 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:38,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:38,673 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:38,673 INFO L186 Difference]: Start difference. First operand has 776 places, 1068 transitions, 19356 flow. Second operand 35 states and 1833 transitions. [2021-11-19 05:15:38,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 1091 transitions, 21652 flow [2021-11-19 05:15:39,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 1091 transitions, 21252 flow, removed 129 selfloop flow, removed 22 redundant places. [2021-11-19 05:15:39,882 INFO L242 Difference]: Finished difference. Result has 787 places, 1043 transitions, 18659 flow [2021-11-19 05:15:39,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18962, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18659, PETRI_PLACES=787, PETRI_TRANSITIONS=1043} [2021-11-19 05:15:39,883 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 699 predicate places. [2021-11-19 05:15:39,883 INFO L470 AbstractCegarLoop]: Abstraction has has 787 places, 1043 transitions, 18659 flow [2021-11-19 05:15:39,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:39,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:39,883 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:39,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-11-19 05:15:39,883 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash 797387738, now seen corresponding path program 188 times [2021-11-19 05:15:39,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:39,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677605036] [2021-11-19 05:15:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:39,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:40,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:40,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677605036] [2021-11-19 05:15:40,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677605036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:40,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:40,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:15:40,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260661673] [2021-11-19 05:15:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:40,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:15:40,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:15:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:15:40,239 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:40,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1043 transitions, 18659 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:40,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:40,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:40,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:43,680 INFO L129 PetriNetUnfolder]: 803/2466 cut-off events. [2021-11-19 05:15:43,680 INFO L130 PetriNetUnfolder]: For 109020/109020 co-relation queries the response was YES. [2021-11-19 05:15:43,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24684 conditions, 2466 events. 803/2466 cut-off events. For 109020/109020 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19853 event pairs, 47 based on Foata normal form. 1/2464 useless extension candidates. Maximal degree in co-relation 24399. Up to 1736 conditions per place. [2021-11-19 05:15:43,770 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 915 selfloop transitions, 183 changer transitions 21/1158 dead transitions. [2021-11-19 05:15:43,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 1158 transitions, 23293 flow [2021-11-19 05:15:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:15:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:15:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1974 transitions. [2021-11-19 05:15:43,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2021-11-19 05:15:43,772 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1974 transitions. [2021-11-19 05:15:43,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1974 transitions. [2021-11-19 05:15:43,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:43,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1974 transitions. [2021-11-19 05:15:43,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.351351351351354) internal successors, (1974), 37 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:43,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:43,776 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:43,776 INFO L186 Difference]: Start difference. First operand has 787 places, 1043 transitions, 18659 flow. Second operand 37 states and 1974 transitions. [2021-11-19 05:15:43,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 1158 transitions, 23293 flow [2021-11-19 05:15:44,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 762 places, 1158 transitions, 22914 flow, removed 63 selfloop flow, removed 37 redundant places. [2021-11-19 05:15:44,866 INFO L242 Difference]: Finished difference. Result has 774 places, 1109 transitions, 20368 flow [2021-11-19 05:15:44,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18310, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=872, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20368, PETRI_PLACES=774, PETRI_TRANSITIONS=1109} [2021-11-19 05:15:44,867 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 686 predicate places. [2021-11-19 05:15:44,867 INFO L470 AbstractCegarLoop]: Abstraction has has 774 places, 1109 transitions, 20368 flow [2021-11-19 05:15:44,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:44,867 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:44,867 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:44,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-11-19 05:15:44,867 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1151205230, now seen corresponding path program 189 times [2021-11-19 05:15:44,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:44,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45075703] [2021-11-19 05:15:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:44,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:45,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:45,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45075703] [2021-11-19 05:15:45,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45075703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:45,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:45,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:15:45,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105572439] [2021-11-19 05:15:45,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:45,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:15:45,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:15:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:15:45,227 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:45,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 1109 transitions, 20368 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:45,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:45,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:45,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:48,207 INFO L129 PetriNetUnfolder]: 798/2467 cut-off events. [2021-11-19 05:15:48,207 INFO L130 PetriNetUnfolder]: For 115020/115020 co-relation queries the response was YES. [2021-11-19 05:15:48,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25093 conditions, 2467 events. 798/2467 cut-off events. For 115020/115020 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 19863 event pairs, 51 based on Foata normal form. 1/2465 useless extension candidates. Maximal degree in co-relation 24809. Up to 1767 conditions per place. [2021-11-19 05:15:48,288 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 947 selfloop transitions, 150 changer transitions 24/1160 dead transitions. [2021-11-19 05:15:48,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 1160 transitions, 23831 flow [2021-11-19 05:15:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:15:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-19 05:15:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1614 transitions. [2021-11-19 05:15:48,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5723404255319149 [2021-11-19 05:15:48,289 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1614 transitions. [2021-11-19 05:15:48,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1614 transitions. [2021-11-19 05:15:48,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:48,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1614 transitions. [2021-11-19 05:15:48,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.8) internal successors, (1614), 30 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:48,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:48,293 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:48,293 INFO L186 Difference]: Start difference. First operand has 774 places, 1109 transitions, 20368 flow. Second operand 30 states and 1614 transitions. [2021-11-19 05:15:48,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 1160 transitions, 23831 flow [2021-11-19 05:15:49,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1160 transitions, 23084 flow, removed 304 selfloop flow, removed 22 redundant places. [2021-11-19 05:15:49,456 INFO L242 Difference]: Finished difference. Result has 782 places, 1111 transitions, 20247 flow [2021-11-19 05:15:49,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=19634, PETRI_DIFFERENCE_MINUEND_PLACES=746, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=962, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=20247, PETRI_PLACES=782, PETRI_TRANSITIONS=1111} [2021-11-19 05:15:49,456 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 694 predicate places. [2021-11-19 05:15:49,457 INFO L470 AbstractCegarLoop]: Abstraction has has 782 places, 1111 transitions, 20247 flow [2021-11-19 05:15:49,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:49,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:49,457 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:49,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-11-19 05:15:49,457 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1343683862, now seen corresponding path program 190 times [2021-11-19 05:15:49,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:49,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60919072] [2021-11-19 05:15:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:49,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:49,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:49,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60919072] [2021-11-19 05:15:49,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60919072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:49,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:49,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:15:49,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786223894] [2021-11-19 05:15:49,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:49,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:15:49,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:15:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:15:49,856 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:49,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 1111 transitions, 20247 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:49,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:49,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:49,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:53,950 INFO L129 PetriNetUnfolder]: 817/2489 cut-off events. [2021-11-19 05:15:53,950 INFO L130 PetriNetUnfolder]: For 118966/118966 co-relation queries the response was YES. [2021-11-19 05:15:54,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25532 conditions, 2489 events. 817/2489 cut-off events. For 118966/118966 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20009 event pairs, 46 based on Foata normal form. 1/2486 useless extension candidates. Maximal degree in co-relation 25243. Up to 1782 conditions per place. [2021-11-19 05:15:54,176 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 974 selfloop transitions, 151 changer transitions 30/1194 dead transitions. [2021-11-19 05:15:54,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1194 transitions, 24445 flow [2021-11-19 05:15:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:15:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:15:54,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1907 transitions. [2021-11-19 05:15:54,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635342789598109 [2021-11-19 05:15:54,178 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1907 transitions. [2021-11-19 05:15:54,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1907 transitions. [2021-11-19 05:15:54,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:15:54,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1907 transitions. [2021-11-19 05:15:54,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.97222222222222) internal successors, (1907), 36 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:54,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:54,182 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:54,182 INFO L186 Difference]: Start difference. First operand has 782 places, 1111 transitions, 20247 flow. Second operand 36 states and 1907 transitions. [2021-11-19 05:15:54,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1194 transitions, 24445 flow [2021-11-19 05:15:55,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1194 transitions, 24071 flow, removed 149 selfloop flow, removed 17 redundant places. [2021-11-19 05:15:55,388 INFO L242 Difference]: Finished difference. Result has 806 places, 1141 transitions, 21126 flow [2021-11-19 05:15:55,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=19889, PETRI_DIFFERENCE_MINUEND_PLACES=760, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21126, PETRI_PLACES=806, PETRI_TRANSITIONS=1141} [2021-11-19 05:15:55,389 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 718 predicate places. [2021-11-19 05:15:55,389 INFO L470 AbstractCegarLoop]: Abstraction has has 806 places, 1141 transitions, 21126 flow [2021-11-19 05:15:55,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:55,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:15:55,389 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:15:55,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-11-19 05:15:55,389 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:15:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:15:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 687551494, now seen corresponding path program 191 times [2021-11-19 05:15:55,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:15:55,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327834262] [2021-11-19 05:15:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:15:55,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:15:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:15:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:15:55,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:15:55,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327834262] [2021-11-19 05:15:55,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327834262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:15:55,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:15:55,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:15:55,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577015348] [2021-11-19 05:15:55,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:15:55,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:15:55,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:15:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:15:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:15:55,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:15:55,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 1141 transitions, 21126 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:15:55,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:15:55,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:15:55,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:15:59,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 05:16:01,215 INFO L129 PetriNetUnfolder]: 808/2493 cut-off events. [2021-11-19 05:16:01,216 INFO L130 PetriNetUnfolder]: For 118869/118869 co-relation queries the response was YES. [2021-11-19 05:16:01,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25531 conditions, 2493 events. 808/2493 cut-off events. For 118869/118869 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20182 event pairs, 44 based on Foata normal form. 1/2491 useless extension candidates. Maximal degree in co-relation 25234. Up to 1788 conditions per place. [2021-11-19 05:16:01,303 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 981 selfloop transitions, 160 changer transitions 21/1201 dead transitions. [2021-11-19 05:16:01,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 1201 transitions, 24875 flow [2021-11-19 05:16:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:16:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:16:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1817 transitions. [2021-11-19 05:16:01,304 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568523153942428 [2021-11-19 05:16:01,305 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1817 transitions. [2021-11-19 05:16:01,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1817 transitions. [2021-11-19 05:16:01,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:01,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1817 transitions. [2021-11-19 05:16:01,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.44117647058823) internal successors, (1817), 34 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:01,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:01,309 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:01,309 INFO L186 Difference]: Start difference. First operand has 806 places, 1141 transitions, 21126 flow. Second operand 34 states and 1817 transitions. [2021-11-19 05:16:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 1201 transitions, 24875 flow [2021-11-19 05:16:02,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 1201 transitions, 24467 flow, removed 105 selfloop flow, removed 29 redundant places. [2021-11-19 05:16:02,751 INFO L242 Difference]: Finished difference. Result has 811 places, 1153 transitions, 21585 flow [2021-11-19 05:16:02,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20744, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21585, PETRI_PLACES=811, PETRI_TRANSITIONS=1153} [2021-11-19 05:16:02,752 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 723 predicate places. [2021-11-19 05:16:02,752 INFO L470 AbstractCegarLoop]: Abstraction has has 811 places, 1153 transitions, 21585 flow [2021-11-19 05:16:02,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:02,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:02,752 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:02,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-11-19 05:16:02,753 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash 798532648, now seen corresponding path program 192 times [2021-11-19 05:16:02,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:02,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925430223] [2021-11-19 05:16:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:02,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:03,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:03,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925430223] [2021-11-19 05:16:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925430223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:03,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:03,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:16:03,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017996198] [2021-11-19 05:16:03,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:03,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:16:03,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:16:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:16:03,156 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:03,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 811 places, 1153 transitions, 21585 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:03,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:03,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:03,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:06,505 INFO L129 PetriNetUnfolder]: 809/2492 cut-off events. [2021-11-19 05:16:06,506 INFO L130 PetriNetUnfolder]: For 119954/119954 co-relation queries the response was YES. [2021-11-19 05:16:06,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25754 conditions, 2492 events. 809/2492 cut-off events. For 119954/119954 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20107 event pairs, 47 based on Foata normal form. 1/2490 useless extension candidates. Maximal degree in co-relation 25457. Up to 1788 conditions per place. [2021-11-19 05:16:06,587 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 981 selfloop transitions, 169 changer transitions 20/1209 dead transitions. [2021-11-19 05:16:06,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 1209 transitions, 25402 flow [2021-11-19 05:16:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 05:16:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-19 05:16:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2069 transitions. [2021-11-19 05:16:06,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5643753409710857 [2021-11-19 05:16:06,590 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2069 transitions. [2021-11-19 05:16:06,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2069 transitions. [2021-11-19 05:16:06,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:06,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2069 transitions. [2021-11-19 05:16:06,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.05128205128205) internal successors, (2069), 39 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:06,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:06,597 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:06,597 INFO L186 Difference]: Start difference. First operand has 811 places, 1153 transitions, 21585 flow. Second operand 39 states and 2069 transitions. [2021-11-19 05:16:06,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 1209 transitions, 25402 flow [2021-11-19 05:16:08,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 817 places, 1209 transitions, 24859 flow, removed 171 selfloop flow, removed 27 redundant places. [2021-11-19 05:16:08,050 INFO L242 Difference]: Finished difference. Result has 827 places, 1162 transitions, 21870 flow [2021-11-19 05:16:08,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21073, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=21870, PETRI_PLACES=827, PETRI_TRANSITIONS=1162} [2021-11-19 05:16:08,051 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 739 predicate places. [2021-11-19 05:16:08,051 INFO L470 AbstractCegarLoop]: Abstraction has has 827 places, 1162 transitions, 21870 flow [2021-11-19 05:16:08,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:08,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:08,051 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:08,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-11-19 05:16:08,052 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:08,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:08,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2090404956, now seen corresponding path program 193 times [2021-11-19 05:16:08,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:08,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333449222] [2021-11-19 05:16:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:08,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:08,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:08,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333449222] [2021-11-19 05:16:08,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333449222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:08,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:08,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:16:08,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048576648] [2021-11-19 05:16:08,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:08,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:16:08,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:16:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:16:08,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:08,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 827 places, 1162 transitions, 21870 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:08,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:08,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:08,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:12,095 INFO L129 PetriNetUnfolder]: 815/2510 cut-off events. [2021-11-19 05:16:12,095 INFO L130 PetriNetUnfolder]: For 119148/119148 co-relation queries the response was YES. [2021-11-19 05:16:12,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25924 conditions, 2510 events. 815/2510 cut-off events. For 119148/119148 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20328 event pairs, 41 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 25621. Up to 1740 conditions per place. [2021-11-19 05:16:12,158 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 966 selfloop transitions, 177 changer transitions 38/1220 dead transitions. [2021-11-19 05:16:12,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 1220 transitions, 25389 flow [2021-11-19 05:16:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:16:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-19 05:16:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1808 transitions. [2021-11-19 05:16:12,160 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5657071339173968 [2021-11-19 05:16:12,160 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1808 transitions. [2021-11-19 05:16:12,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1808 transitions. [2021-11-19 05:16:12,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:12,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1808 transitions. [2021-11-19 05:16:12,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.1764705882353) internal successors, (1808), 34 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:12,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:12,165 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:12,166 INFO L186 Difference]: Start difference. First operand has 827 places, 1162 transitions, 21870 flow. Second operand 34 states and 1808 transitions. [2021-11-19 05:16:12,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 1220 transitions, 25389 flow [2021-11-19 05:16:13,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 826 places, 1220 transitions, 24810 flow, removed 181 selfloop flow, removed 28 redundant places. [2021-11-19 05:16:13,537 INFO L242 Difference]: Finished difference. Result has 836 places, 1157 transitions, 21685 flow [2021-11-19 05:16:13,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21311, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21685, PETRI_PLACES=836, PETRI_TRANSITIONS=1157} [2021-11-19 05:16:13,538 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 748 predicate places. [2021-11-19 05:16:13,538 INFO L470 AbstractCegarLoop]: Abstraction has has 836 places, 1157 transitions, 21685 flow [2021-11-19 05:16:13,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:13,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:13,538 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:13,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-11-19 05:16:13,539 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:13,539 INFO L85 PathProgramCache]: Analyzing trace with hash -746629290, now seen corresponding path program 194 times [2021-11-19 05:16:13,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:13,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484062083] [2021-11-19 05:16:13,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:13,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:13,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:13,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484062083] [2021-11-19 05:16:13,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484062083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:13,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:13,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 05:16:13,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606333200] [2021-11-19 05:16:13,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:13,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:16:13,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:16:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:16:13,917 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:13,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 1157 transitions, 21685 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:13,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:13,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:13,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:17,311 INFO L129 PetriNetUnfolder]: 795/2447 cut-off events. [2021-11-19 05:16:17,311 INFO L130 PetriNetUnfolder]: For 113182/113182 co-relation queries the response was YES. [2021-11-19 05:16:17,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25381 conditions, 2447 events. 795/2447 cut-off events. For 113182/113182 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19750 event pairs, 43 based on Foata normal form. 1/2445 useless extension candidates. Maximal degree in co-relation 25074. Up to 1786 conditions per place. [2021-11-19 05:16:17,397 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 994 selfloop transitions, 139 changer transitions 21/1193 dead transitions. [2021-11-19 05:16:17,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 1193 transitions, 24557 flow [2021-11-19 05:16:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:16:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-19 05:16:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1911 transitions. [2021-11-19 05:16:17,398 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5647163120567376 [2021-11-19 05:16:17,399 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1911 transitions. [2021-11-19 05:16:17,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1911 transitions. [2021-11-19 05:16:17,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:17,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1911 transitions. [2021-11-19 05:16:17,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.083333333333336) internal successors, (1911), 36 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:17,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:17,402 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:17,402 INFO L186 Difference]: Start difference. First operand has 836 places, 1157 transitions, 21685 flow. Second operand 36 states and 1911 transitions. [2021-11-19 05:16:17,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 1193 transitions, 24557 flow [2021-11-19 05:16:18,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 1193 transitions, 24049 flow, removed 41 selfloop flow, removed 32 redundant places. [2021-11-19 05:16:18,761 INFO L242 Difference]: Finished difference. Result has 838 places, 1150 transitions, 21445 flow [2021-11-19 05:16:18,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21187, PETRI_DIFFERENCE_MINUEND_PLACES=795, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21445, PETRI_PLACES=838, PETRI_TRANSITIONS=1150} [2021-11-19 05:16:18,762 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 750 predicate places. [2021-11-19 05:16:18,762 INFO L470 AbstractCegarLoop]: Abstraction has has 838 places, 1150 transitions, 21445 flow [2021-11-19 05:16:18,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:18,762 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:18,762 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:18,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-11-19 05:16:18,763 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1310120478, now seen corresponding path program 195 times [2021-11-19 05:16:18,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:18,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906580449] [2021-11-19 05:16:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:18,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:19,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:19,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906580449] [2021-11-19 05:16:19,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906580449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:19,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:19,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:16:19,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697508264] [2021-11-19 05:16:19,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:19,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:16:19,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:16:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:16:19,148 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:19,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 1150 transitions, 21445 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:19,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:19,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:19,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:22,225 INFO L129 PetriNetUnfolder]: 792/2461 cut-off events. [2021-11-19 05:16:22,225 INFO L130 PetriNetUnfolder]: For 110807/110807 co-relation queries the response was YES. [2021-11-19 05:16:22,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25096 conditions, 2461 events. 792/2461 cut-off events. For 110807/110807 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19895 event pairs, 43 based on Foata normal form. 1/2459 useless extension candidates. Maximal degree in co-relation 24790. Up to 1781 conditions per place. [2021-11-19 05:16:22,311 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 991 selfloop transitions, 131 changer transitions 25/1186 dead transitions. [2021-11-19 05:16:22,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 1186 transitions, 24183 flow [2021-11-19 05:16:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 05:16:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-19 05:16:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1746 transitions. [2021-11-19 05:16:22,314 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.562862669245648 [2021-11-19 05:16:22,314 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1746 transitions. [2021-11-19 05:16:22,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1746 transitions. [2021-11-19 05:16:22,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:22,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1746 transitions. [2021-11-19 05:16:22,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.90909090909091) internal successors, (1746), 33 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:22,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:22,320 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:22,321 INFO L186 Difference]: Start difference. First operand has 838 places, 1150 transitions, 21445 flow. Second operand 33 states and 1746 transitions. [2021-11-19 05:16:22,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 1186 transitions, 24183 flow [2021-11-19 05:16:23,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 1186 transitions, 23839 flow, removed 13 selfloop flow, removed 36 redundant places. [2021-11-19 05:16:23,750 INFO L242 Difference]: Finished difference. Result has 829 places, 1140 transitions, 21159 flow [2021-11-19 05:16:23,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21105, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1019, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21159, PETRI_PLACES=829, PETRI_TRANSITIONS=1140} [2021-11-19 05:16:23,751 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 741 predicate places. [2021-11-19 05:16:23,751 INFO L470 AbstractCegarLoop]: Abstraction has has 829 places, 1140 transitions, 21159 flow [2021-11-19 05:16:23,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:23,751 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:23,751 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:23,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-11-19 05:16:23,752 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1110269324, now seen corresponding path program 196 times [2021-11-19 05:16:23,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:23,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34026982] [2021-11-19 05:16:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:23,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:24,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:24,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34026982] [2021-11-19 05:16:24,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34026982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:24,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:24,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:16:24,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760561270] [2021-11-19 05:16:24,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:24,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:16:24,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:16:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:16:24,142 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:24,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 1140 transitions, 21159 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:24,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:24,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:24,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:27,688 INFO L129 PetriNetUnfolder]: 796/2457 cut-off events. [2021-11-19 05:16:27,688 INFO L130 PetriNetUnfolder]: For 116407/116407 co-relation queries the response was YES. [2021-11-19 05:16:27,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25482 conditions, 2457 events. 796/2457 cut-off events. For 116407/116407 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19801 event pairs, 42 based on Foata normal form. 1/2456 useless extension candidates. Maximal degree in co-relation 25179. Up to 1823 conditions per place. [2021-11-19 05:16:27,757 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1002 selfloop transitions, 131 changer transitions 22/1194 dead transitions. [2021-11-19 05:16:27,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 1194 transitions, 24838 flow [2021-11-19 05:16:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:16:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-19 05:16:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2121 transitions. [2021-11-19 05:16:27,759 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5640957446808511 [2021-11-19 05:16:27,760 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2121 transitions. [2021-11-19 05:16:27,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2121 transitions. [2021-11-19 05:16:27,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:27,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2121 transitions. [2021-11-19 05:16:27,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.025) internal successors, (2121), 40 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:27,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:27,764 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:27,764 INFO L186 Difference]: Start difference. First operand has 829 places, 1140 transitions, 21159 flow. Second operand 40 states and 2121 transitions. [2021-11-19 05:16:27,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 1194 transitions, 24838 flow [2021-11-19 05:16:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 824 places, 1194 transitions, 24305 flow, removed 76 selfloop flow, removed 36 redundant places. [2021-11-19 05:16:29,170 INFO L242 Difference]: Finished difference. Result has 836 places, 1153 transitions, 21490 flow [2021-11-19 05:16:29,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20682, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=21490, PETRI_PLACES=836, PETRI_TRANSITIONS=1153} [2021-11-19 05:16:29,171 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 748 predicate places. [2021-11-19 05:16:29,171 INFO L470 AbstractCegarLoop]: Abstraction has has 836 places, 1153 transitions, 21490 flow [2021-11-19 05:16:29,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:29,171 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:29,171 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:29,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-11-19 05:16:29,172 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash -488979178, now seen corresponding path program 197 times [2021-11-19 05:16:29,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:29,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853343327] [2021-11-19 05:16:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:29,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:29,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:29,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853343327] [2021-11-19 05:16:29,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853343327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:29,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:29,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:16:29,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176265910] [2021-11-19 05:16:29,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:29,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:16:29,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:29,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:16:29,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:16:29,565 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:29,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 1153 transitions, 21490 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:29,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:29,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:29,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:32,957 INFO L129 PetriNetUnfolder]: 791/2454 cut-off events. [2021-11-19 05:16:32,957 INFO L130 PetriNetUnfolder]: For 114586/114586 co-relation queries the response was YES. [2021-11-19 05:16:33,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25229 conditions, 2454 events. 791/2454 cut-off events. For 114586/114586 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19846 event pairs, 45 based on Foata normal form. 1/2452 useless extension candidates. Maximal degree in co-relation 24923. Up to 1821 conditions per place. [2021-11-19 05:16:33,045 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1005 selfloop transitions, 116 changer transitions 26/1186 dead transitions. [2021-11-19 05:16:33,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 1186 transitions, 24291 flow [2021-11-19 05:16:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:16:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-19 05:16:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1963 transitions. [2021-11-19 05:16:33,047 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644048303622772 [2021-11-19 05:16:33,047 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1963 transitions. [2021-11-19 05:16:33,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1963 transitions. [2021-11-19 05:16:33,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:33,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1963 transitions. [2021-11-19 05:16:33,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.054054054054056) internal successors, (1963), 37 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:33,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:33,051 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:33,051 INFO L186 Difference]: Start difference. First operand has 836 places, 1153 transitions, 21490 flow. Second operand 37 states and 1963 transitions. [2021-11-19 05:16:33,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 1186 transitions, 24291 flow [2021-11-19 05:16:34,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 1186 transitions, 23668 flow, removed 228 selfloop flow, removed 28 redundant places. [2021-11-19 05:16:34,443 INFO L242 Difference]: Finished difference. Result has 845 places, 1145 transitions, 21111 flow [2021-11-19 05:16:34,443 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20937, PETRI_DIFFERENCE_MINUEND_PLACES=802, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=21111, PETRI_PLACES=845, PETRI_TRANSITIONS=1145} [2021-11-19 05:16:34,443 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 757 predicate places. [2021-11-19 05:16:34,443 INFO L470 AbstractCegarLoop]: Abstraction has has 845 places, 1145 transitions, 21111 flow [2021-11-19 05:16:34,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:34,444 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:34,444 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:34,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-11-19 05:16:34,444 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1729617762, now seen corresponding path program 198 times [2021-11-19 05:16:34,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:34,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466102523] [2021-11-19 05:16:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:34,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:34,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:34,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466102523] [2021-11-19 05:16:34,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466102523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:34,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:34,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:16:34,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956545802] [2021-11-19 05:16:34,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:34,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:16:34,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:16:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:16:34,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:34,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 845 places, 1145 transitions, 21111 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:34,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:34,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:34,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:38,063 INFO L129 PetriNetUnfolder]: 805/2481 cut-off events. [2021-11-19 05:16:38,064 INFO L130 PetriNetUnfolder]: For 115193/115193 co-relation queries the response was YES. [2021-11-19 05:16:38,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25670 conditions, 2481 events. 805/2481 cut-off events. For 115193/115193 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20105 event pairs, 39 based on Foata normal form. 1/2480 useless extension candidates. Maximal degree in co-relation 25364. Up to 1741 conditions per place. [2021-11-19 05:16:38,154 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 948 selfloop transitions, 210 changer transitions 24/1221 dead transitions. [2021-11-19 05:16:38,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 1221 transitions, 25427 flow [2021-11-19 05:16:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:16:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-19 05:16:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2179 transitions. [2021-11-19 05:16:38,156 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5653866113129217 [2021-11-19 05:16:38,156 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2179 transitions. [2021-11-19 05:16:38,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2179 transitions. [2021-11-19 05:16:38,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:38,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2179 transitions. [2021-11-19 05:16:38,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 53.146341463414636) internal successors, (2179), 41 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:38,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:38,160 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:38,160 INFO L186 Difference]: Start difference. First operand has 845 places, 1145 transitions, 21111 flow. Second operand 41 states and 2179 transitions. [2021-11-19 05:16:38,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 1221 transitions, 25427 flow [2021-11-19 05:16:39,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 836 places, 1221 transitions, 25086 flow, removed 33 selfloop flow, removed 38 redundant places. [2021-11-19 05:16:39,565 INFO L242 Difference]: Finished difference. Result has 848 places, 1173 transitions, 22178 flow [2021-11-19 05:16:39,565 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20814, PETRI_DIFFERENCE_MINUEND_PLACES=796, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=22178, PETRI_PLACES=848, PETRI_TRANSITIONS=1173} [2021-11-19 05:16:39,565 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 760 predicate places. [2021-11-19 05:16:39,565 INFO L470 AbstractCegarLoop]: Abstraction has has 848 places, 1173 transitions, 22178 flow [2021-11-19 05:16:39,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:39,566 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:39,566 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:39,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-11-19 05:16:39,566 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1997731312, now seen corresponding path program 199 times [2021-11-19 05:16:39,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:39,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881591441] [2021-11-19 05:16:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:39,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:39,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:39,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881591441] [2021-11-19 05:16:39,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881591441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:39,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:39,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 05:16:39,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902705565] [2021-11-19 05:16:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:39,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:16:39,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:16:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:16:39,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:39,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 1173 transitions, 22178 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:39,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:39,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:39,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:43,557 INFO L129 PetriNetUnfolder]: 796/2484 cut-off events. [2021-11-19 05:16:43,557 INFO L130 PetriNetUnfolder]: For 116053/116053 co-relation queries the response was YES. [2021-11-19 05:16:43,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25738 conditions, 2484 events. 796/2484 cut-off events. For 116053/116053 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20222 event pairs, 44 based on Foata normal form. 1/2482 useless extension candidates. Maximal degree in co-relation 25430. Up to 1762 conditions per place. [2021-11-19 05:16:43,619 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 970 selfloop transitions, 170 changer transitions 31/1210 dead transitions. [2021-11-19 05:16:43,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 879 places, 1210 transitions, 25181 flow [2021-11-19 05:16:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:16:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-19 05:16:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2020 transitions. [2021-11-19 05:16:43,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5655095184770437 [2021-11-19 05:16:43,621 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2020 transitions. [2021-11-19 05:16:43,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2020 transitions. [2021-11-19 05:16:43,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:43,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2020 transitions. [2021-11-19 05:16:43,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 53.1578947368421) internal successors, (2020), 38 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:43,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:43,625 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:43,625 INFO L186 Difference]: Start difference. First operand has 848 places, 1173 transitions, 22178 flow. Second operand 38 states and 2020 transitions. [2021-11-19 05:16:43,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 879 places, 1210 transitions, 25181 flow [2021-11-19 05:16:45,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 1210 transitions, 24518 flow, removed 238 selfloop flow, removed 27 redundant places. [2021-11-19 05:16:45,151 INFO L242 Difference]: Finished difference. Result has 859 places, 1160 transitions, 21794 flow [2021-11-19 05:16:45,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21587, PETRI_DIFFERENCE_MINUEND_PLACES=815, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1003, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21794, PETRI_PLACES=859, PETRI_TRANSITIONS=1160} [2021-11-19 05:16:45,152 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 771 predicate places. [2021-11-19 05:16:45,152 INFO L470 AbstractCegarLoop]: Abstraction has has 859 places, 1160 transitions, 21794 flow [2021-11-19 05:16:45,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:45,152 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:45,152 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:45,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-11-19 05:16:45,153 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -755212472, now seen corresponding path program 200 times [2021-11-19 05:16:45,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:45,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482626448] [2021-11-19 05:16:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:45,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:45,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:45,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482626448] [2021-11-19 05:16:45,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482626448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:45,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:45,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:16:45,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782795857] [2021-11-19 05:16:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:45,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:16:45,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:16:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:16:45,618 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:45,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 1160 transitions, 21794 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:45,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:45,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:45,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-19 05:16:49,589 INFO L129 PetriNetUnfolder]: 791/2467 cut-off events. [2021-11-19 05:16:49,589 INFO L130 PetriNetUnfolder]: For 115559/115559 co-relation queries the response was YES. [2021-11-19 05:16:49,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25698 conditions, 2467 events. 791/2467 cut-off events. For 115559/115559 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20012 event pairs, 41 based on Foata normal form. 1/2466 useless extension candidates. Maximal degree in co-relation 25388. Up to 1827 conditions per place. [2021-11-19 05:16:49,672 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1016 selfloop transitions, 125 changer transitions 27/1207 dead transitions. [2021-11-19 05:16:49,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 1207 transitions, 25208 flow [2021-11-19 05:16:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:16:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-19 05:16:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1663 transitions. [2021-11-19 05:16:49,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5706932052161977 [2021-11-19 05:16:49,674 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1663 transitions. [2021-11-19 05:16:49,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1663 transitions. [2021-11-19 05:16:49,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:16:49,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1663 transitions. [2021-11-19 05:16:49,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.645161290322584) internal successors, (1663), 31 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:49,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:49,680 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:49,680 INFO L186 Difference]: Start difference. First operand has 859 places, 1160 transitions, 21794 flow. Second operand 31 states and 1663 transitions. [2021-11-19 05:16:49,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 878 places, 1207 transitions, 25208 flow [2021-11-19 05:16:51,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 1207 transitions, 24706 flow, removed 27 selfloop flow, removed 40 redundant places. [2021-11-19 05:16:51,122 INFO L242 Difference]: Finished difference. Result has 848 places, 1161 transitions, 21797 flow [2021-11-19 05:16:51,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21334, PETRI_DIFFERENCE_MINUEND_PLACES=808, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21797, PETRI_PLACES=848, PETRI_TRANSITIONS=1161} [2021-11-19 05:16:51,122 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 760 predicate places. [2021-11-19 05:16:51,123 INFO L470 AbstractCegarLoop]: Abstraction has has 848 places, 1161 transitions, 21797 flow [2021-11-19 05:16:51,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:51,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-19 05:16:51,123 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:16:51,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-11-19 05:16:51,123 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 05:16:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:16:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash 913418096, now seen corresponding path program 201 times [2021-11-19 05:16:51,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:16:51,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287533408] [2021-11-19 05:16:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:16:51,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:16:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:16:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:16:51,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:16:51,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287533408] [2021-11-19 05:16:51,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287533408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:16:51,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:16:51,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 05:16:51,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714406242] [2021-11-19 05:16:51,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:16:51,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:16:51,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:16:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:16:51,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:16:51,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-11-19 05:16:51,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 1161 transitions, 21797 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:16:51,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-19 05:16:51,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-11-19 05:16:51,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand