./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dc558ff06d1f59013c6fd3228f6de1555b4f43a79036afca93164a3b9d9173fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:37:59,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:37:59,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:37:59,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:37:59,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:37:59,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:37:59,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:37:59,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:37:59,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:37:59,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:37:59,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:37:59,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:37:59,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:37:59,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:37:59,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:37:59,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:37:59,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:37:59,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:37:59,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:37:59,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:37:59,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:37:59,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:37:59,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:37:59,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:37:59,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:37:59,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:37:59,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:37:59,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:37:59,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:37:59,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:37:59,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:37:59,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:37:59,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:37:59,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:37:59,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:37:59,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:37:59,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:37:59,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:37:59,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:37:59,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:37:59,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:37:59,877 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:37:59,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:37:59,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:37:59,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:37:59,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:37:59,906 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:37:59,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:37:59,907 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:37:59,907 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:37:59,907 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:37:59,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:37:59,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:37:59,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:37:59,908 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:37:59,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:37:59,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:37:59,909 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:37:59,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:37:59,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:37:59,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:37:59,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:37:59,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:37:59,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:37:59,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:37:59,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:37:59,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:37:59,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:37:59,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:37:59,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:37:59,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:37:59,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:37:59,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:37:59,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:59,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:37:59,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:37:59,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:37:59,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:37:59,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:37:59,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:37:59,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:37:59,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:37:59,915 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc558ff06d1f59013c6fd3228f6de1555b4f43a79036afca93164a3b9d9173fd [2021-11-12 23:38:00,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:38:00,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:38:00,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:38:00,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:38:00,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:38:00,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c [2021-11-12 23:38:00,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/data/5da3eb476/534625b45c564caebeb447f10606c289/FLAG6ddeb1da8 [2021-11-12 23:38:01,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:38:01,465 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c [2021-11-12 23:38:01,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/data/5da3eb476/534625b45c564caebeb447f10606c289/FLAG6ddeb1da8 [2021-11-12 23:38:01,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/data/5da3eb476/534625b45c564caebeb447f10606c289 [2021-11-12 23:38:01,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:38:01,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:38:01,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:01,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:38:01,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:38:01,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:01" (1/1) ... [2021-11-12 23:38:01,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c7c554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:01, skipping insertion in model container [2021-11-12 23:38:01,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:01" (1/1) ... [2021-11-12 23:38:01,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:38:02,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:04,785 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[381679,381692] [2021-11-12 23:38:04,848 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[383339,383352] [2021-11-12 23:38:05,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:05,263 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:38:06,615 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[381679,381692] [2021-11-12 23:38:06,621 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[383339,383352] [2021-11-12 23:38:06,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:06,770 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:38:06,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06 WrapperNode [2021-11-12 23:38:06,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:06,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:06,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:38:06,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:38:06,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:06,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:07,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:07,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:38:07,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:38:07,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:38:07,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:07,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:07,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:07,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:07,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:07,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:08,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:08,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:38:08,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:38:08,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:38:08,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:38:08,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (1/1) ... [2021-11-12 23:38:08,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:08,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:08,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:38:08,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:38:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:38:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:38:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:38:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:38:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:38:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:38:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:38:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-12 23:38:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-12 23:38:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:38:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:38:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:38:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:38:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:38:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:38:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:38:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:38:08,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:38:20,007 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:38:20,007 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-12 23:38:20,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:20 BoogieIcfgContainer [2021-11-12 23:38:20,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:38:20,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:38:20,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:38:20,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:38:20,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:38:01" (1/3) ... [2021-11-12 23:38:20,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36099271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:20, skipping insertion in model container [2021-11-12 23:38:20,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:06" (2/3) ... [2021-11-12 23:38:20,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36099271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:20, skipping insertion in model container [2021-11-12 23:38:20,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:20" (3/3) ... [2021-11-12 23:38:20,036 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.10.cil-1.c [2021-11-12 23:38:20,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:38:20,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:38:20,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:38:20,138 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=FINITE_AUTOMATA, 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 [2021-11-12 23:38:20,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:38:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-12 23:38:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:38:20,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:20,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:20,238 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:20,245 INFO L85 PathProgramCache]: Analyzing trace with hash -265792825, now seen corresponding path program 1 times [2021-11-12 23:38:20,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:20,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087560807] [2021-11-12 23:38:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:20,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:20,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:20,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087560807] [2021-11-12 23:38:20,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087560807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:20,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:20,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:38:20,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399343790] [2021-11-12 23:38:20,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:20,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:20,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:20,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:20,925 INFO L87 Difference]: Start difference. First operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:38:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:22,314 INFO L93 Difference]: Finished difference Result 3778 states and 7335 transitions. [2021-11-12 23:38:22,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-12 23:38:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:22,363 INFO L225 Difference]: With dead ends: 3778 [2021-11-12 23:38:22,364 INFO L226 Difference]: Without dead ends: 1962 [2021-11-12 23:38:22,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:22,389 INFO L933 BasicCegarLoop]: 3458 mSDtfsCounter, 3721 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 745.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 77.29ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1013.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:22,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3721 Valid, 6824 Invalid, 712 Unknown, 0 Unchecked, 77.29ms Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1013.75ms Time] [2021-11-12 23:38:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-11-12 23:38:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1961. [2021-11-12 23:38:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1901 states have (on average 1.9263545502367174) internal successors, (3662), 1905 states have internal predecessors, (3662), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-12 23:38:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3752 transitions. [2021-11-12 23:38:22,622 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3752 transitions. Word has length 62 [2021-11-12 23:38:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:22,624 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3752 transitions. [2021-11-12 23:38:22,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:38:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3752 transitions. [2021-11-12 23:38:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:38:22,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:22,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:22,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:38:22,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2122641059, now seen corresponding path program 1 times [2021-11-12 23:38:22,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:22,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547526031] [2021-11-12 23:38:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:22,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:38:22,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:22,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547526031] [2021-11-12 23:38:22,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547526031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:22,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87770635] [2021-11-12 23:38:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:22,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:22,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:22,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:38:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:38:23,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:38:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87770635] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:23,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:23,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:38:23,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78397106] [2021-11-12 23:38:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:23,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:23,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:23,838 INFO L87 Difference]: Start difference. First operand 1961 states and 3752 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:24,479 INFO L93 Difference]: Finished difference Result 2584 states and 4719 transitions. [2021-11-12 23:38:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2021-11-12 23:38:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:24,503 INFO L225 Difference]: With dead ends: 2584 [2021-11-12 23:38:24,503 INFO L226 Difference]: Without dead ends: 2269 [2021-11-12 23:38:24,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:24,508 INFO L933 BasicCegarLoop]: 3323 mSDtfsCounter, 3479 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 414.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.59ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 497.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:24,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3479 Valid, 3525 Invalid, 309 Unknown, 0 Unchecked, 18.59ms Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 497.90ms Time] [2021-11-12 23:38:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-11-12 23:38:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2263. [2021-11-12 23:38:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2153 states have (on average 1.8769159312587087) internal successors, (4041), 2158 states have internal predecessors, (4041), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-12 23:38:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4207 transitions. [2021-11-12 23:38:24,638 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4207 transitions. Word has length 123 [2021-11-12 23:38:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:24,639 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 4207 transitions. [2021-11-12 23:38:24,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4207 transitions. [2021-11-12 23:38:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:38:24,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:24,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:24,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:24,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:24,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:24,875 INFO L85 PathProgramCache]: Analyzing trace with hash -723195837, now seen corresponding path program 1 times [2021-11-12 23:38:24,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:24,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776233515] [2021-11-12 23:38:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:24,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:38:24,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:24,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776233515] [2021-11-12 23:38:24,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776233515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:24,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140770380] [2021-11-12 23:38:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:24,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:24,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:24,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:25,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:38:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:38:25,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:38:25,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140770380] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:25,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:25,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:38:25,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514158396] [2021-11-12 23:38:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:25,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:25,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:25,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:25,819 INFO L87 Difference]: Start difference. First operand 2263 states and 4207 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:26,409 INFO L93 Difference]: Finished difference Result 3484 states and 6098 transitions. [2021-11-12 23:38:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:26,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2021-11-12 23:38:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:26,435 INFO L225 Difference]: With dead ends: 3484 [2021-11-12 23:38:26,435 INFO L226 Difference]: Without dead ends: 2867 [2021-11-12 23:38:26,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:26,442 INFO L933 BasicCegarLoop]: 3322 mSDtfsCounter, 3497 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 367.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3524 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 438.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:26,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 3524 Invalid, 309 Unknown, 0 Unchecked, 14.56ms Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 438.10ms Time] [2021-11-12 23:38:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-11-12 23:38:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2859. [2021-11-12 23:38:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2651 states have (on average 1.8057336854017352) internal successors, (4787), 2658 states have internal predecessors, (4787), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-12 23:38:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 5101 transitions. [2021-11-12 23:38:26,806 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 5101 transitions. Word has length 123 [2021-11-12 23:38:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:26,807 INFO L470 AbstractCegarLoop]: Abstraction has 2859 states and 5101 transitions. [2021-11-12 23:38:26,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 5101 transitions. [2021-11-12 23:38:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:38:26,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:26,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:26,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:27,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:27,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash 890616291, now seen corresponding path program 1 times [2021-11-12 23:38:27,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:27,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002117874] [2021-11-12 23:38:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:27,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:38:27,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:27,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002117874] [2021-11-12 23:38:27,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002117874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:27,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672105554] [2021-11-12 23:38:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:27,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:27,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:27,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:27,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:38:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:27,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:38:27,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:38:28,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672105554] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:28,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:28,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:38:28,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205519444] [2021-11-12 23:38:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:28,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:28,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:28,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:28,026 INFO L87 Difference]: Start difference. First operand 2859 states and 5101 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:28,729 INFO L93 Difference]: Finished difference Result 5260 states and 8806 transitions. [2021-11-12 23:38:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2021-11-12 23:38:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:28,772 INFO L225 Difference]: With dead ends: 5260 [2021-11-12 23:38:28,772 INFO L226 Difference]: Without dead ends: 4047 [2021-11-12 23:38:28,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:28,782 INFO L933 BasicCegarLoop]: 3285 mSDtfsCounter, 3491 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 406.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.04ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 489.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:28,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3491 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 11.04ms Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 489.32ms Time] [2021-11-12 23:38:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-11-12 23:38:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 4035. [2021-11-12 23:38:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 3635 states have (on average 1.7207702888583218) internal successors, (6255), 3646 states have internal predecessors, (6255), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2021-11-12 23:38:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6857 transitions. [2021-11-12 23:38:29,051 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6857 transitions. Word has length 123 [2021-11-12 23:38:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:29,051 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 6857 transitions. [2021-11-12 23:38:29,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6857 transitions. [2021-11-12 23:38:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:38:29,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:29,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:29,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:29,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-12 23:38:29,287 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2016166787, now seen corresponding path program 1 times [2021-11-12 23:38:29,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:29,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093834898] [2021-11-12 23:38:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:29,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:38:29,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:29,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093834898] [2021-11-12 23:38:29,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093834898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:29,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424647404] [2021-11-12 23:38:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:29,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:29,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:29,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:38:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:38:29,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:38:30,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424647404] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:30,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:30,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:38:30,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277972324] [2021-11-12 23:38:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:30,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:30,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:30,322 INFO L87 Difference]: Start difference. First operand 4035 states and 6857 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:31,069 INFO L93 Difference]: Finished difference Result 8764 states and 14122 transitions. [2021-11-12 23:38:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2021-11-12 23:38:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:31,129 INFO L225 Difference]: With dead ends: 8764 [2021-11-12 23:38:31,129 INFO L226 Difference]: Without dead ends: 6375 [2021-11-12 23:38:31,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:31,151 INFO L933 BasicCegarLoop]: 3285 mSDtfsCounter, 3500 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 386.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.92ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 462.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:31,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3500 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 10.92ms Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 462.49ms Time] [2021-11-12 23:38:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2021-11-12 23:38:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6355. [2021-11-12 23:38:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5579 states have (on average 1.6388241620362072) internal successors, (9143), 5598 states have internal predecessors, (9143), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-12 23:38:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 10305 transitions. [2021-11-12 23:38:31,612 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 10305 transitions. Word has length 123 [2021-11-12 23:38:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:31,612 INFO L470 AbstractCegarLoop]: Abstraction has 6355 states and 10305 transitions. [2021-11-12 23:38:31,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 10305 transitions. [2021-11-12 23:38:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:38:31,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:31,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:31,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:31,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:31,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1229360611, now seen corresponding path program 1 times [2021-11-12 23:38:31,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:31,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059265838] [2021-11-12 23:38:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:31,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:38:31,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:31,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059265838] [2021-11-12 23:38:31,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059265838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:31,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480614051] [2021-11-12 23:38:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:31,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:31,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:31,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:38:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:32,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:38:32,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:38:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480614051] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:32,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:32,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:38:32,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37232668] [2021-11-12 23:38:32,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:32,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:32,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:32,958 INFO L87 Difference]: Start difference. First operand 6355 states and 10305 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:33,789 INFO L93 Difference]: Finished difference Result 15676 states and 24554 transitions. [2021-11-12 23:38:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2021-11-12 23:38:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:33,895 INFO L225 Difference]: With dead ends: 15676 [2021-11-12 23:38:33,895 INFO L226 Difference]: Without dead ends: 10967 [2021-11-12 23:38:33,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:33,924 INFO L933 BasicCegarLoop]: 3285 mSDtfsCounter, 3485 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 360.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.79ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 430.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:33,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3485 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 8.79ms Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 430.20ms Time] [2021-11-12 23:38:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2021-11-12 23:38:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 10931. [2021-11-12 23:38:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 9419 states have (on average 1.5737339420320628) internal successors, (14823), 9454 states have internal predecessors, (14823), 1126 states have call successors, (1126), 385 states have call predecessors, (1126), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2021-11-12 23:38:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 17073 transitions. [2021-11-12 23:38:34,544 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 17073 transitions. Word has length 123 [2021-11-12 23:38:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 10931 states and 17073 transitions. [2021-11-12 23:38:34,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:38:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 17073 transitions. [2021-11-12 23:38:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:38:34,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:34,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:34,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:34,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c65f95f-178b-4f03-957d-e5dfa78ba1cb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:34,787 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash 468504451, now seen corresponding path program 1 times [2021-11-12 23:38:34,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:34,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681607298] [2021-11-12 23:38:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:34,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:38:34,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:34,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681607298] [2021-11-12 23:38:34,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681607298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:34,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:34,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:38:34,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58143473] [2021-11-12 23:38:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:34,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:34,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:34,989 INFO L87 Difference]: Start difference. First operand 10931 states and 17073 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:38:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:37,156 INFO L93 Difference]: Finished difference Result 25179 states and 38535 transitions. [2021-11-12 23:38:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:38:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2021-11-12 23:38:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:37,237 INFO L225 Difference]: With dead ends: 25179 [2021-11-12 23:38:37,238 INFO L226 Difference]: Without dead ends: 15895 [2021-11-12 23:38:37,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:38:37,274 INFO L933 BasicCegarLoop]: 3291 mSDtfsCounter, 3959 mSDsluCounter, 10415 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 806.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3965 SdHoareTripleChecker+Valid, 12965 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.63ms SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 974.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:37,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3965 Valid, 12965 Invalid, 1337 Unknown, 0 Unchecked, 47.63ms Time], IncrementalHoareTripleChecker [138 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 974.12ms Time] [2021-11-12 23:38:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2021-11-12 23:38:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 15443. [2021-11-12 23:38:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15443 states, 13195 states have (on average 1.544145509662751) internal successors, (20375), 13246 states have internal predecessors, (20375), 1670 states have call successors, (1670), 577 states have call predecessors, (1670), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2021-11-12 23:38:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15443 states to 15443 states and 23713 transitions. [2021-11-12 23:38:38,061 INFO L78 Accepts]: Start accepts. Automaton has 15443 states and 23713 transitions. Word has length 123 [2021-11-12 23:38:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:38,062 INFO L470 AbstractCegarLoop]: Abstraction has 15443 states and 23713 transitions. [2021-11-12 23:38:38,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:38:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 15443 states and 23713 transitions. [2021-11-12 23:38:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:38:38,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:38,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:38,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:38:38,101 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash -99256466, now seen corresponding path program 1 times [2021-11-12 23:38:38,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:38,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144673950] [2021-11-12 23:38:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:38,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:38:38,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:38,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144673950] [2021-11-12 23:38:38,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144673950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:38,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:38,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:38:38,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41820592] [2021-11-12 23:38:38,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:38,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:38,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:38,276 INFO L87 Difference]: Start difference. First operand 15443 states and 23713 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:38:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:40,987 INFO L93 Difference]: Finished difference Result 49499 states and 74312 transitions. [2021-11-12 23:38:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:38:40,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2021-11-12 23:38:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:41,198 INFO L225 Difference]: With dead ends: 49499 [2021-11-12 23:38:41,198 INFO L226 Difference]: Without dead ends: 35703 [2021-11-12 23:38:41,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:38:41,263 INFO L933 BasicCegarLoop]: 3297 mSDtfsCounter, 4177 mSDsluCounter, 10445 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 774.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 12993 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.13ms SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 933.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:41,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4196 Valid, 12993 Invalid, 1343 Unknown, 0 Unchecked, 39.13ms Time], IncrementalHoareTripleChecker [138 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 933.72ms Time] [2021-11-12 23:38:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35703 states. [2021-11-12 23:38:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35703 to 28659. [2021-11-12 23:38:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28659 states, 24267 states have (on average 1.5088391642971937) internal successors, (36615), 24366 states have internal predecessors, (36615), 3238 states have call successors, (3238), 1153 states have call predecessors, (3238), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2021-11-12 23:38:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28659 states to 28659 states and 43089 transitions. [2021-11-12 23:38:43,127 INFO L78 Accepts]: Start accepts. Automaton has 28659 states and 43089 transitions. Word has length 124 [2021-11-12 23:38:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:43,129 INFO L470 AbstractCegarLoop]: Abstraction has 28659 states and 43089 transitions. [2021-11-12 23:38:43,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:38:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 28659 states and 43089 transitions. [2021-11-12 23:38:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:38:43,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:43,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:43,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:38:43,192 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash 167906019, now seen corresponding path program 1 times [2021-11-12 23:38:43,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:43,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516884475] [2021-11-12 23:38:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:43,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:38:43,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:43,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516884475] [2021-11-12 23:38:43,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516884475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:43,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:43,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:38:43,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428043868] [2021-11-12 23:38:43,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:43,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:43,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:43,323 INFO L87 Difference]: Start difference. First operand 28659 states and 43089 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:38:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:46,385 INFO L93 Difference]: Finished difference Result 74491 states and 111191 transitions. [2021-11-12 23:38:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:38:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2021-11-12 23:38:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:46,610 INFO L225 Difference]: With dead ends: 74491 [2021-11-12 23:38:46,610 INFO L226 Difference]: Without dead ends: 47479 [2021-11-12 23:38:46,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:38:46,672 INFO L933 BasicCegarLoop]: 3280 mSDtfsCounter, 4104 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 766.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 9828 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.96ms SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 915.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:46,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 9828 Invalid, 1058 Unknown, 0 Unchecked, 30.96ms Time], IncrementalHoareTripleChecker [150 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 915.28ms Time] [2021-11-12 23:38:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47479 states. [2021-11-12 23:38:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47479 to 41779. [2021-11-12 23:38:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41779 states, 35243 states have (on average 1.492920579973328) internal successors, (52615), 35390 states have internal predecessors, (52615), 4806 states have call successors, (4806), 1729 states have call predecessors, (4806), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2021-11-12 23:38:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41779 states to 41779 states and 62225 transitions. [2021-11-12 23:38:48,776 INFO L78 Accepts]: Start accepts. Automaton has 41779 states and 62225 transitions. Word has length 125 [2021-11-12 23:38:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:48,777 INFO L470 AbstractCegarLoop]: Abstraction has 41779 states and 62225 transitions. [2021-11-12 23:38:48,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:38:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 41779 states and 62225 transitions. [2021-11-12 23:38:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:38:48,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:48,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:48,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:38:48,863 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2018420366, now seen corresponding path program 1 times [2021-11-12 23:38:48,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:38:48,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210381656] [2021-11-12 23:38:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:48,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:38:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:38:49,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:38:49,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210381656] [2021-11-12 23:38:49,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210381656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:49,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:49,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:38:49,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757563710] [2021-11-12 23:38:49,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:49,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:49,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:38:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:49,005 INFO L87 Difference]: Start difference. First operand 41779 states and 62225 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:38:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:54,108 INFO L93 Difference]: Finished difference Result 135099 states and 200472 transitions. [2021-11-12 23:38:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:38:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2021-11-12 23:38:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:54,515 INFO L225 Difference]: With dead ends: 135099 [2021-11-12 23:38:54,515 INFO L226 Difference]: Without dead ends: 94967 [2021-11-12 23:38:54,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:38:54,631 INFO L933 BasicCegarLoop]: 3272 mSDtfsCounter, 4146 mSDsluCounter, 6987 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 582.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4165 SdHoareTripleChecker+Valid, 9759 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.00ms SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 824.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:54,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4165 Valid, 9759 Invalid, 1050 Unknown, 0 Unchecked, 19.00ms Time], IncrementalHoareTripleChecker [154 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 824.98ms Time] [2021-11-12 23:38:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94967 states. [2021-11-12 23:38:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94967 to 80179. [2021-11-12 23:38:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80179 states, 67403 states have (on average 1.4742222156283844) internal successors, (99367), 67694 states have internal predecessors, (99367), 9318 states have call successors, (9318), 3457 states have call predecessors, (9318), 3456 states have return successors, (9316), 9028 states have call predecessors, (9316), 9316 states have call successors, (9316) [2021-11-12 23:39:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80179 states to 80179 states and 118001 transitions. [2021-11-12 23:39:00,082 INFO L78 Accepts]: Start accepts. Automaton has 80179 states and 118001 transitions. Word has length 126 [2021-11-12 23:39:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:00,115 INFO L470 AbstractCegarLoop]: Abstraction has 80179 states and 118001 transitions. [2021-11-12 23:39:00,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:39:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 80179 states and 118001 transitions. [2021-11-12 23:39:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:39:00,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:00,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:00,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:39:00,259 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1590655423, now seen corresponding path program 1 times [2021-11-12 23:39:00,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:39:00,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67610428] [2021-11-12 23:39:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:00,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:39:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:39:00,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:39:00,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67610428] [2021-11-12 23:39:00,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67610428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:00,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:00,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:39:00,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579332376] [2021-11-12 23:39:00,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:00,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:39:00,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:39:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:39:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:39:00,394 INFO L87 Difference]: Start difference. First operand 80179 states and 118001 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:39:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:07,698 INFO L93 Difference]: Finished difference Result 209595 states and 308999 transitions. [2021-11-12 23:39:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:39:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2021-11-12 23:39:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:08,299 INFO L225 Difference]: With dead ends: 209595 [2021-11-12 23:39:08,299 INFO L226 Difference]: Without dead ends: 131063 [2021-11-12 23:39:08,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:08,493 INFO L933 BasicCegarLoop]: 3280 mSDtfsCounter, 4058 mSDsluCounter, 7032 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 666.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4064 SdHoareTripleChecker+Valid, 9808 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.74ms SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 823.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:08,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4064 Valid, 9808 Invalid, 1054 Unknown, 0 Unchecked, 19.74ms Time], IncrementalHoareTripleChecker [150 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 823.73ms Time] [2021-11-12 23:39:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131063 states.