./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label56.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur --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 bac94640e4b1ca65f803532eef7d71e2867b8956b5651dd4d9133fab907f3070 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:54:21,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:54:21,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:54:21,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:54:21,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:54:21,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:54:21,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:54:21,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:54:21,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:54:21,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:54:21,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:54:21,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:54:21,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:54:21,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:54:21,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:54:21,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:54:21,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:54:21,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:54:21,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:54:21,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:54:21,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:54:21,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:54:21,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:54:21,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:54:21,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:54:21,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:54:21,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:54:21,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:54:21,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:54:21,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:54:21,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:54:21,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:54:21,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:54:21,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:54:21,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:54:21,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:54:21,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:54:21,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:54:21,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:54:21,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:54:21,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:54:21,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:54:21,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:54:21,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:54:21,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:54:21,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:54:21,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:54:21,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:54:21,863 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:54:21,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:54:21,863 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:54:21,864 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:54:21,865 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:54:21,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:54:21,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:54:21,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:54:21,866 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:54:21,866 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:54:21,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:54:21,867 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:54:21,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:54:21,869 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:54:21,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:54:21,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:54:21,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:54:21,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:54:21,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:54:21,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:54:21,872 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:54:21,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:54:21,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:54:21,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:54:21,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:54:21,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:54:21,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:54:21,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:54:21,874 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:54:21,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:54:21,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:54:21,876 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:54:21,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:54:21,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:54:21,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:54:21,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bac94640e4b1ca65f803532eef7d71e2867b8956b5651dd4d9133fab907f3070 [2022-11-26 00:54:22,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:54:22,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:54:22,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:54:22,279 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:54:22,279 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:54:22,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/eca-rers2012/Problem03_label56.c [2022-11-26 00:54:25,648 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:54:26,103 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:54:26,104 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/sv-benchmarks/c/eca-rers2012/Problem03_label56.c [2022-11-26 00:54:26,126 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/data/19f008d65/b7bd76b6dc0246eaa583d45295622e13/FLAG93f9ccaa1 [2022-11-26 00:54:26,151 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/data/19f008d65/b7bd76b6dc0246eaa583d45295622e13 [2022-11-26 00:54:26,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:54:26,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:54:26,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:54:26,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:54:26,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:54:26,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:54:26" (1/1) ... [2022-11-26 00:54:26,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59cd9654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:26, skipping insertion in model container [2022-11-26 00:54:26,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:54:26" (1/1) ... [2022-11-26 00:54:26,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:54:26,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:54:26,992 WARN L237 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_8cd93f43-399d-4af5-a434-79a2bb024690/sv-benchmarks/c/eca-rers2012/Problem03_label56.c[57575,57588] [2022-11-26 00:54:27,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:54:27,044 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:54:27,375 WARN L237 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_8cd93f43-399d-4af5-a434-79a2bb024690/sv-benchmarks/c/eca-rers2012/Problem03_label56.c[57575,57588] [2022-11-26 00:54:27,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:54:27,415 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:54:27,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27 WrapperNode [2022-11-26 00:54:27,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:54:27,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:54:27,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:54:27,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:54:27,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,632 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-26 00:54:27,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:54:27,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:54:27,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:54:27,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:54:27,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:54:27,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:54:27,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:54:27,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:54:27,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (1/1) ... [2022-11-26 00:54:27,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:54:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:27,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:54:27,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:54:27,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:54:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:54:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:54:27,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:54:28,024 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:54:28,027 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:54:30,510 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:54:30,959 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:54:30,960 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:54:30,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:54:30 BoogieIcfgContainer [2022-11-26 00:54:30,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:54:30,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:54:30,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:54:30,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:54:30,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:54:26" (1/3) ... [2022-11-26 00:54:30,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4844aabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:54:30, skipping insertion in model container [2022-11-26 00:54:30,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:27" (2/3) ... [2022-11-26 00:54:30,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4844aabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:54:30, skipping insertion in model container [2022-11-26 00:54:30,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:54:30" (3/3) ... [2022-11-26 00:54:30,975 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label56.c [2022-11-26 00:54:30,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:54:31,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:54:31,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:54:31,072 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@662e8875, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:54:31,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:54:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:54:31,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:31,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:31,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1724861960, now seen corresponding path program 1 times [2022-11-26 00:54:31,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:31,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731099943] [2022-11-26 00:54:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:31,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:32,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:32,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731099943] [2022-11-26 00:54:32,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731099943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:32,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:32,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:54:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643991420] [2022-11-26 00:54:32,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:32,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:32,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:32,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:32,274 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:33,581 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-26 00:54:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:33,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-26 00:54:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:33,597 INFO L225 Difference]: With dead ends: 440 [2022-11-26 00:54:33,597 INFO L226 Difference]: Without dead ends: 289 [2022-11-26 00:54:33,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:33,604 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:33,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 51 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:54:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-26 00:54:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-26 00:54:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2022-11-26 00:54:33,684 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2022-11-26 00:54:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:33,685 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2022-11-26 00:54:33,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2022-11-26 00:54:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-26 00:54:33,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:33,689 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:33,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:54:33,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:33,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1817675159, now seen corresponding path program 1 times [2022-11-26 00:54:33,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:33,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106413915] [2022-11-26 00:54:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:33,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:34,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106413915] [2022-11-26 00:54:34,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106413915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:34,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:34,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:54:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115626764] [2022-11-26 00:54:34,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:34,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:34,016 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:34,998 INFO L93 Difference]: Finished difference Result 863 states and 1560 transitions. [2022-11-26 00:54:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-26 00:54:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:35,012 INFO L225 Difference]: With dead ends: 863 [2022-11-26 00:54:35,012 INFO L226 Difference]: Without dead ends: 575 [2022-11-26 00:54:35,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:35,027 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:35,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 22 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:54:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-26 00:54:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-26 00:54:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7682926829268293) internal successors, (1015), 574 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1015 transitions. [2022-11-26 00:54:35,063 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1015 transitions. Word has length 151 [2022-11-26 00:54:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:35,063 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1015 transitions. [2022-11-26 00:54:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1015 transitions. [2022-11-26 00:54:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-26 00:54:35,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:35,077 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:35,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:54:35,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:35,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:35,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1578723766, now seen corresponding path program 1 times [2022-11-26 00:54:35,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:35,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383573025] [2022-11-26 00:54:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:35,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:35,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383573025] [2022-11-26 00:54:35,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383573025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:35,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:35,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:54:35,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621796430] [2022-11-26 00:54:35,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:35,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:35,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:35,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:35,353 INFO L87 Difference]: Start difference. First operand 575 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:36,347 INFO L93 Difference]: Finished difference Result 1723 states and 3043 transitions. [2022-11-26 00:54:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:36,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-26 00:54:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:36,353 INFO L225 Difference]: With dead ends: 1723 [2022-11-26 00:54:36,354 INFO L226 Difference]: Without dead ends: 1149 [2022-11-26 00:54:36,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:36,356 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 171 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:36,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 43 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:54:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-26 00:54:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-11-26 00:54:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6413612565445026) internal successors, (1881), 1146 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1881 transitions. [2022-11-26 00:54:36,420 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1881 transitions. Word has length 152 [2022-11-26 00:54:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:36,423 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1881 transitions. [2022-11-26 00:54:36,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1881 transitions. [2022-11-26 00:54:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-26 00:54:36,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:36,435 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:36,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:54:36,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash -688083246, now seen corresponding path program 1 times [2022-11-26 00:54:36,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:36,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280868780] [2022-11-26 00:54:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:36,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:36,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:36,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280868780] [2022-11-26 00:54:36,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280868780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:36,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:36,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:54:36,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828612678] [2022-11-26 00:54:36,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:36,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:36,924 INFO L87 Difference]: Start difference. First operand 1147 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:37,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:37,987 INFO L93 Difference]: Finished difference Result 2865 states and 4676 transitions. [2022-11-26 00:54:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-26 00:54:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:37,998 INFO L225 Difference]: With dead ends: 2865 [2022-11-26 00:54:37,998 INFO L226 Difference]: Without dead ends: 1719 [2022-11-26 00:54:38,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:38,012 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:38,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 33 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:54:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-26 00:54:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-26 00:54:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5948777648428405) internal successors, (2740), 1718 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2740 transitions. [2022-11-26 00:54:38,096 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2740 transitions. Word has length 153 [2022-11-26 00:54:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:38,097 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2740 transitions. [2022-11-26 00:54:38,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2740 transitions. [2022-11-26 00:54:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-26 00:54:38,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:38,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:38,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:54:38,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash 733015418, now seen corresponding path program 1 times [2022-11-26 00:54:38,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:38,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234649644] [2022-11-26 00:54:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:38,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:38,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234649644] [2022-11-26 00:54:38,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234649644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468546498] [2022-11-26 00:54:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:38,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:38,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:38,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:54:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:54:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:54:39,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:39,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468546498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:39,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:39,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 00:54:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309508265] [2022-11-26 00:54:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:39,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:39,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:39,415 INFO L87 Difference]: Start difference. First operand 1719 states and 2740 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:40,474 INFO L93 Difference]: Finished difference Result 5153 states and 8217 transitions. [2022-11-26 00:54:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-26 00:54:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:40,494 INFO L225 Difference]: With dead ends: 5153 [2022-11-26 00:54:40,494 INFO L226 Difference]: Without dead ends: 3435 [2022-11-26 00:54:40,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:40,504 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:40,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 265 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:54:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-11-26 00:54:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-11-26 00:54:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3774024461269656) internal successors, (4730), 3434 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4730 transitions. [2022-11-26 00:54:40,612 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4730 transitions. Word has length 158 [2022-11-26 00:54:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:40,614 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4730 transitions. [2022-11-26 00:54:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4730 transitions. [2022-11-26 00:54:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-26 00:54:40,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:40,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:40,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:54:40,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:40,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:40,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1568773481, now seen corresponding path program 1 times [2022-11-26 00:54:40,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:40,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729293496] [2022-11-26 00:54:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:40,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:41,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729293496] [2022-11-26 00:54:41,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729293496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004159415] [2022-11-26 00:54:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:41,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:41,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:41,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:54:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:54:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:54:41,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004159415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:41,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:41,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-26 00:54:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003508867] [2022-11-26 00:54:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:41,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:41,556 INFO L87 Difference]: Start difference. First operand 3435 states and 4730 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:42,675 INFO L93 Difference]: Finished difference Result 10160 states and 14025 transitions. [2022-11-26 00:54:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-26 00:54:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:42,701 INFO L225 Difference]: With dead ends: 10160 [2022-11-26 00:54:42,702 INFO L226 Difference]: Without dead ends: 6726 [2022-11-26 00:54:42,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:42,708 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 156 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:42,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 79 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:54:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2022-11-26 00:54:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 6724. [2022-11-26 00:54:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 1.3269373791462145) internal successors, (8921), 6723 states have internal predecessors, (8921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 8921 transitions. [2022-11-26 00:54:42,961 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 8921 transitions. Word has length 163 [2022-11-26 00:54:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:42,961 INFO L495 AbstractCegarLoop]: Abstraction has 6724 states and 8921 transitions. [2022-11-26 00:54:42,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 8921 transitions. [2022-11-26 00:54:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-26 00:54:42,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:42,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:42,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:43,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:54:43,187 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:43,187 INFO L85 PathProgramCache]: Analyzing trace with hash -49850308, now seen corresponding path program 1 times [2022-11-26 00:54:43,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:43,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500499509] [2022-11-26 00:54:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:43,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:43,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500499509] [2022-11-26 00:54:43,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500499509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:43,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539858900] [2022-11-26 00:54:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:43,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:43,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:43,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:43,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:54:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:44,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:54:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:54:44,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:44,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539858900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:44,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:44,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:54:44,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888251137] [2022-11-26 00:54:44,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:44,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:44,500 INFO L87 Difference]: Start difference. First operand 6724 states and 8921 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:45,613 INFO L93 Difference]: Finished difference Result 15163 states and 20310 transitions. [2022-11-26 00:54:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-11-26 00:54:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:45,649 INFO L225 Difference]: With dead ends: 15163 [2022-11-26 00:54:45,650 INFO L226 Difference]: Without dead ends: 8440 [2022-11-26 00:54:45,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:45,660 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:45,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 210 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:54:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2022-11-26 00:54:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 8440. [2022-11-26 00:54:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8440 states, 8439 states have (on average 1.3360587747363433) internal successors, (11275), 8439 states have internal predecessors, (11275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8440 states to 8440 states and 11275 transitions. [2022-11-26 00:54:45,967 INFO L78 Accepts]: Start accepts. Automaton has 8440 states and 11275 transitions. Word has length 191 [2022-11-26 00:54:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:45,968 INFO L495 AbstractCegarLoop]: Abstraction has 8440 states and 11275 transitions. [2022-11-26 00:54:45,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 8440 states and 11275 transitions. [2022-11-26 00:54:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-26 00:54:45,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:45,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:46,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:46,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:54:46,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1116550048, now seen corresponding path program 1 times [2022-11-26 00:54:46,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:46,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688971998] [2022-11-26 00:54:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:46,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:54:46,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688971998] [2022-11-26 00:54:46,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688971998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:46,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:46,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:54:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903229873] [2022-11-26 00:54:46,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:46,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:46,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:46,460 INFO L87 Difference]: Start difference. First operand 8440 states and 11275 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:47,545 INFO L93 Difference]: Finished difference Result 20025 states and 27150 transitions. [2022-11-26 00:54:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:47,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-11-26 00:54:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:47,589 INFO L225 Difference]: With dead ends: 20025 [2022-11-26 00:54:47,589 INFO L226 Difference]: Without dead ends: 11586 [2022-11-26 00:54:47,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:47,601 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 150 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:47,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 104 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:54:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2022-11-26 00:54:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 11586. [2022-11-26 00:54:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11586 states, 11585 states have (on average 1.2798446266724213) internal successors, (14827), 11585 states have internal predecessors, (14827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11586 states to 11586 states and 14827 transitions. [2022-11-26 00:54:47,945 INFO L78 Accepts]: Start accepts. Automaton has 11586 states and 14827 transitions. Word has length 197 [2022-11-26 00:54:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:47,946 INFO L495 AbstractCegarLoop]: Abstraction has 11586 states and 14827 transitions. [2022-11-26 00:54:47,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11586 states and 14827 transitions. [2022-11-26 00:54:47,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-26 00:54:47,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:47,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:47,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:54:47,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash 519574205, now seen corresponding path program 1 times [2022-11-26 00:54:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:47,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552532230] [2022-11-26 00:54:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:48,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552532230] [2022-11-26 00:54:48,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552532230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726838568] [2022-11-26 00:54:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:48,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:48,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:48,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:54:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:48,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:54:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:54:48,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:48,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726838568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:48,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:48,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-26 00:54:48,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270206768] [2022-11-26 00:54:48,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:48,839 INFO L87 Difference]: Start difference. First operand 11586 states and 14827 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:49,477 INFO L93 Difference]: Finished difference Result 22885 states and 29211 transitions. [2022-11-26 00:54:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-26 00:54:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:49,515 INFO L225 Difference]: With dead ends: 22885 [2022-11-26 00:54:49,515 INFO L226 Difference]: Without dead ends: 11300 [2022-11-26 00:54:49,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:49,529 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:49,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:54:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11300 states. [2022-11-26 00:54:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11300 to 11300. [2022-11-26 00:54:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11300 states, 11299 states have (on average 1.2515266837773253) internal successors, (14141), 11299 states have internal predecessors, (14141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11300 states to 11300 states and 14141 transitions. [2022-11-26 00:54:49,760 INFO L78 Accepts]: Start accepts. Automaton has 11300 states and 14141 transitions. Word has length 199 [2022-11-26 00:54:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:49,761 INFO L495 AbstractCegarLoop]: Abstraction has 11300 states and 14141 transitions. [2022-11-26 00:54:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 11300 states and 14141 transitions. [2022-11-26 00:54:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-26 00:54:49,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:49,777 INFO L195 NwaCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:49,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:49,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:49,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:49,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1742924671, now seen corresponding path program 1 times [2022-11-26 00:54:49,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:49,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057245060] [2022-11-26 00:54:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:49,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:50,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:50,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057245060] [2022-11-26 00:54:50,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057245060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:50,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:50,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:54:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221832996] [2022-11-26 00:54:50,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:50,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:50,703 INFO L87 Difference]: Start difference. First operand 11300 states and 14141 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:51,737 INFO L93 Difference]: Finished difference Result 24887 states and 30943 transitions. [2022-11-26 00:54:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-11-26 00:54:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:51,768 INFO L225 Difference]: With dead ends: 24887 [2022-11-26 00:54:51,768 INFO L226 Difference]: Without dead ends: 13588 [2022-11-26 00:54:51,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:51,781 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:51,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 70 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:54:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13588 states. [2022-11-26 00:54:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13588 to 13588. [2022-11-26 00:54:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13588 states, 13587 states have (on average 1.2336056524619121) internal successors, (16761), 13587 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13588 states to 13588 states and 16761 transitions. [2022-11-26 00:54:52,113 INFO L78 Accepts]: Start accepts. Automaton has 13588 states and 16761 transitions. Word has length 206 [2022-11-26 00:54:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:52,114 INFO L495 AbstractCegarLoop]: Abstraction has 13588 states and 16761 transitions. [2022-11-26 00:54:52,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 13588 states and 16761 transitions. [2022-11-26 00:54:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-26 00:54:52,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:52,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:52,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:54:52,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1222162114, now seen corresponding path program 1 times [2022-11-26 00:54:52,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:52,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466315438] [2022-11-26 00:54:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:52,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:52,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:52,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466315438] [2022-11-26 00:54:52,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466315438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:52,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:52,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:54:52,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174700162] [2022-11-26 00:54:52,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:52,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:54:52,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:54:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:54:52,863 INFO L87 Difference]: Start difference. First operand 13588 states and 16761 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:54,389 INFO L93 Difference]: Finished difference Result 30893 states and 38087 transitions. [2022-11-26 00:54:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:54:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2022-11-26 00:54:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:54,422 INFO L225 Difference]: With dead ends: 30893 [2022-11-26 00:54:54,422 INFO L226 Difference]: Without dead ends: 17306 [2022-11-26 00:54:54,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:54:54,436 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 220 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:54,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 103 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:54:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17306 states. [2022-11-26 00:54:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17306 to 16734. [2022-11-26 00:54:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16734 states, 16733 states have (on average 1.2162792087491783) internal successors, (20352), 16733 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16734 states to 16734 states and 20352 transitions. [2022-11-26 00:54:54,758 INFO L78 Accepts]: Start accepts. Automaton has 16734 states and 20352 transitions. Word has length 213 [2022-11-26 00:54:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:54,759 INFO L495 AbstractCegarLoop]: Abstraction has 16734 states and 20352 transitions. [2022-11-26 00:54:54,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 16734 states and 20352 transitions. [2022-11-26 00:54:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-26 00:54:54,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:54,779 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:54,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:54:54,780 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1019685163, now seen corresponding path program 1 times [2022-11-26 00:54:54,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:54,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403035000] [2022-11-26 00:54:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:54,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 86 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 00:54:55,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403035000] [2022-11-26 00:54:55,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403035000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587452513] [2022-11-26 00:54:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:55,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:55,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:55,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:54:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:54:55,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-26 00:54:55,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:55,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587452513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:55,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:55,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:54:55,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252189819] [2022-11-26 00:54:55,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:55,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:55,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:55,817 INFO L87 Difference]: Start difference. First operand 16734 states and 20352 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:56,875 INFO L93 Difference]: Finished difference Result 41332 states and 50723 transitions. [2022-11-26 00:54:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-11-26 00:54:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:56,931 INFO L225 Difference]: With dead ends: 41332 [2022-11-26 00:54:56,932 INFO L226 Difference]: Without dead ends: 24742 [2022-11-26 00:54:56,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:56,951 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:56,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 285 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:54:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24742 states. [2022-11-26 00:54:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24742 to 24027. [2022-11-26 00:54:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24027 states, 24026 states have (on average 1.2118122034462666) internal successors, (29115), 24026 states have internal predecessors, (29115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24027 states to 24027 states and 29115 transitions. [2022-11-26 00:54:57,591 INFO L78 Accepts]: Start accepts. Automaton has 24027 states and 29115 transitions. Word has length 231 [2022-11-26 00:54:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:57,592 INFO L495 AbstractCegarLoop]: Abstraction has 24027 states and 29115 transitions. [2022-11-26 00:54:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 24027 states and 29115 transitions. [2022-11-26 00:54:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-26 00:54:57,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:57,633 INFO L195 NwaCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:57,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:57,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:54:57,847 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:57,847 INFO L85 PathProgramCache]: Analyzing trace with hash 365974541, now seen corresponding path program 1 times [2022-11-26 00:54:57,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:57,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95881346] [2022-11-26 00:54:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:59,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95881346] [2022-11-26 00:54:59,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95881346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962023925] [2022-11-26 00:54:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:59,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:59,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:59,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:59,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:55:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:00,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:55:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:55:00,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:00,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962023925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:00,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:00,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-26 00:55:00,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560149710] [2022-11-26 00:55:00,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:00,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:00,392 INFO L87 Difference]: Start difference. First operand 24027 states and 29115 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:01,534 INFO L93 Difference]: Finished difference Result 51056 states and 62664 transitions. [2022-11-26 00:55:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:01,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-11-26 00:55:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:01,583 INFO L225 Difference]: With dead ends: 51056 [2022-11-26 00:55:01,583 INFO L226 Difference]: Without dead ends: 27173 [2022-11-26 00:55:01,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:01,598 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:01,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 187 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:55:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27173 states. [2022-11-26 00:55:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27173 to 27173. [2022-11-26 00:55:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27173 states, 27172 states have (on average 1.2260783159134403) internal successors, (33315), 27172 states have internal predecessors, (33315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27173 states to 27173 states and 33315 transitions. [2022-11-26 00:55:02,094 INFO L78 Accepts]: Start accepts. Automaton has 27173 states and 33315 transitions. Word has length 239 [2022-11-26 00:55:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:02,095 INFO L495 AbstractCegarLoop]: Abstraction has 27173 states and 33315 transitions. [2022-11-26 00:55:02,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 27173 states and 33315 transitions. [2022-11-26 00:55:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-26 00:55:02,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:02,121 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:02,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:02,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:02,329 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash -525930419, now seen corresponding path program 1 times [2022-11-26 00:55:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:02,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86249737] [2022-11-26 00:55:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-26 00:55:02,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86249737] [2022-11-26 00:55:02,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86249737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:02,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090836453] [2022-11-26 00:55:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:02,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:02,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:02,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:02,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:55:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:55:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-26 00:55:03,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:03,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090836453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:03,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:03,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:55:03,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579283641] [2022-11-26 00:55:03,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:03,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:55:03,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:03,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:55:03,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:03,397 INFO L87 Difference]: Start difference. First operand 27173 states and 33315 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:05,055 INFO L93 Difference]: Finished difference Result 91813 states and 112219 transitions. [2022-11-26 00:55:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:55:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-11-26 00:55:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:05,163 INFO L225 Difference]: With dead ends: 91813 [2022-11-26 00:55:05,164 INFO L226 Difference]: Without dead ends: 64927 [2022-11-26 00:55:05,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:05,192 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 504 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:05,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 214 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:55:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64927 states. [2022-11-26 00:55:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64927 to 59634. [2022-11-26 00:55:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59634 states, 59633 states have (on average 1.2205154863917629) internal successors, (72783), 59633 states have internal predecessors, (72783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59634 states to 59634 states and 72783 transitions. [2022-11-26 00:55:06,664 INFO L78 Accepts]: Start accepts. Automaton has 59634 states and 72783 transitions. Word has length 253 [2022-11-26 00:55:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:06,664 INFO L495 AbstractCegarLoop]: Abstraction has 59634 states and 72783 transitions. [2022-11-26 00:55:06,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 59634 states and 72783 transitions. [2022-11-26 00:55:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-26 00:55:06,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:06,695 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:06,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:06,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:06,909 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2088309902, now seen corresponding path program 1 times [2022-11-26 00:55:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:06,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685088669] [2022-11-26 00:55:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-26 00:55:07,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685088669] [2022-11-26 00:55:07,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685088669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361488517] [2022-11-26 00:55:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:07,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:07,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:07,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:55:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:55:07,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-26 00:55:07,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:07,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361488517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:07,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:07,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:55:07,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251137195] [2022-11-26 00:55:07,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:07,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:07,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:07,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:07,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:55:07,872 INFO L87 Difference]: Start difference. First operand 59634 states and 72783 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:09,323 INFO L93 Difference]: Finished difference Result 122556 states and 149874 transitions. [2022-11-26 00:55:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:09,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2022-11-26 00:55:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:09,392 INFO L225 Difference]: With dead ends: 122556 [2022-11-26 00:55:09,392 INFO L226 Difference]: Without dead ends: 63495 [2022-11-26 00:55:09,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:55:09,425 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 139 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:09,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 203 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:55:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63495 states. [2022-11-26 00:55:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63495 to 63066. [2022-11-26 00:55:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63066 states, 63065 states have (on average 1.21579322920796) internal successors, (76674), 63065 states have internal predecessors, (76674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63066 states to 63066 states and 76674 transitions. [2022-11-26 00:55:10,878 INFO L78 Accepts]: Start accepts. Automaton has 63066 states and 76674 transitions. Word has length 256 [2022-11-26 00:55:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:10,878 INFO L495 AbstractCegarLoop]: Abstraction has 63066 states and 76674 transitions. [2022-11-26 00:55:10,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 63066 states and 76674 transitions. [2022-11-26 00:55:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-11-26 00:55:10,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:10,922 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2022-11-26 00:55:10,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:11,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:55:11,136 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1008416604, now seen corresponding path program 1 times [2022-11-26 00:55:11,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:11,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795465170] [2022-11-26 00:55:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-26 00:55:11,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:11,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795465170] [2022-11-26 00:55:11,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795465170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586835624] [2022-11-26 00:55:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:11,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:11,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:11,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd93f43-399d-4af5-a434-79a2bb024690/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:55:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:12,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:55:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-26 00:55:12,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-26 00:55:13,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586835624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796619154] [2022-11-26 00:55:13,230 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-26 00:55:13,231 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:13,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:13,244 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:13,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs