./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI --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 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 --- 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-5e519f3 [2022-11-03 02:25:22,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:25:22,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:25:22,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:25:22,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:25:22,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:25:22,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:25:22,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:25:22,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:25:22,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:25:22,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:25:22,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:25:22,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:25:22,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:25:22,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:25:22,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:25:22,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:25:22,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:25:22,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:25:22,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:25:22,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:25:22,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:25:22,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:25:22,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:25:22,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:25:22,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:25:22,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:25:22,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:25:22,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:25:22,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:25:22,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:25:22,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:25:22,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:25:22,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:25:22,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:25:22,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:25:22,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:25:22,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:25:22,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:25:22,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:25:22,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:25:22,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:25:22,853 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:25:22,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:25:22,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:25:22,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:25:22,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:25:22,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:25:22,856 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:25:22,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:25:22,856 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:25:22,857 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:25:22,858 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:25:22,858 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:25:22,858 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:25:22,858 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:25:22,859 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:25:22,859 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:25:22,859 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:25:22,859 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:25:22,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:25:22,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:25:22,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:25:22,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:25:22,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:25:22,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:25:22,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:25:22,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:25:22,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:25:22,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:25:22,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:25:22,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:25:22,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:25:22,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:25:22,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:22,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:25:22,865 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:25:22,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:25:22,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:25:22,866 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:25:22,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:25:22,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:25:22,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:25:22,867 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_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 [2022-11-03 02:25:23,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:25:23,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:25:23,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:25:23,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:25:23,191 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:25:23,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2022-11-03 02:25:23,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/data/3a3651d63/cc70203fa0a5431aa4550d259731eb8d/FLAG942a766f2 [2022-11-03 02:25:23,896 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:25:23,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2022-11-03 02:25:23,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/data/3a3651d63/cc70203fa0a5431aa4550d259731eb8d/FLAG942a766f2 [2022-11-03 02:25:24,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/data/3a3651d63/cc70203fa0a5431aa4550d259731eb8d [2022-11-03 02:25:24,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:25:24,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:25:24,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:24,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:25:24,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:25:24,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:24,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258cbc7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24, skipping insertion in model container [2022-11-03 02:25:24,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:24,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:25:24,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:25:24,472 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2022-11-03 02:25:24,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:24,831 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:25:24,853 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2022-11-03 02:25:24,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:24,975 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:25:24,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24 WrapperNode [2022-11-03 02:25:24,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:24,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:24,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:25:24,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:25:24,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,106 INFO L138 Inliner]: procedures = 95, calls = 355, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 989 [2022-11-03 02:25:25,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:25,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:25:25,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:25:25,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:25:25,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,231 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:25:25,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:25:25,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:25:25,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:25:25,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (1/1) ... [2022-11-03 02:25:25,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:25,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:25:25,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:25:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:25:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:25:25,361 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:25:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 02:25:25,361 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 02:25:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:25:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:25:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:25:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:25:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:25:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:25:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:25:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:25:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:25:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:25:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:25:25,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:25:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:25:25,364 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:25:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:25:25,364 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:25:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:25:25,364 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:25:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:25:25,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:25:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:25:25,365 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:25:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:25:25,365 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:25:25,366 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:25:25,367 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:25:25,367 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:25:25,368 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:25:25,368 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-03 02:25:25,368 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-03 02:25:25,368 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:25:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:25:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-03 02:25:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-03 02:25:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:25:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:25:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:25:25,370 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:25:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:25:25,374 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:25:25,375 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:25:25,376 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:25:25,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:25:25,377 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:25:25,378 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:25:25,378 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:25:25,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:25:25,378 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:25:25,378 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:25:25,379 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:25:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:25:25,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:25:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:25:25,379 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:25:25,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:25:25,551 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:25:25,568 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:25:26,855 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:25:27,612 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:25:27,613 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:25:27,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:27 BoogieIcfgContainer [2022-11-03 02:25:27,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:25:27,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:25:27,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:25:27,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:25:27,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:25:24" (1/3) ... [2022-11-03 02:25:27,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c283686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:27, skipping insertion in model container [2022-11-03 02:25:27,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:24" (2/3) ... [2022-11-03 02:25:27,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c283686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:27, skipping insertion in model container [2022-11-03 02:25:27,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:27" (3/3) ... [2022-11-03 02:25:27,628 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product31.cil.c [2022-11-03 02:25:27,646 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:25:27,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:25:27,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:25:27,752 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;@51c37858, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:25:27,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:25:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2022-11-03 02:25:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:25:27,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:27,804 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:25:27,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1810760911, now seen corresponding path program 1 times [2022-11-03 02:25:27,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:27,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497071038] [2022-11-03 02:25:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:27,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:25:29,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497071038] [2022-11-03 02:25:29,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497071038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:29,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:25:29,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835901105] [2022-11-03 02:25:29,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:29,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:29,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:29,160 INFO L87 Difference]: Start difference. First operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:25:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:30,627 INFO L93 Difference]: Finished difference Result 1496 states and 2438 transitions. [2022-11-03 02:25:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:25:30,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-03 02:25:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:30,664 INFO L225 Difference]: With dead ends: 1496 [2022-11-03 02:25:30,665 INFO L226 Difference]: Without dead ends: 1071 [2022-11-03 02:25:30,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:25:30,679 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 882 mSDsluCounter, 3435 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 4267 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:30,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 4267 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:25:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-11-03 02:25:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 788. [2022-11-03 02:25:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 536 states have (on average 1.5485074626865671) internal successors, (830), 566 states have internal predecessors, (830), 203 states have call successors, (203), 51 states have call predecessors, (203), 48 states have return successors, (213), 190 states have call predecessors, (213), 199 states have call successors, (213) [2022-11-03 02:25:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2022-11-03 02:25:30,843 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 88 [2022-11-03 02:25:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:30,844 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2022-11-03 02:25:30,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:25:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2022-11-03 02:25:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:25:30,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:30,850 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:25:30,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:25:30,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash 912651686, now seen corresponding path program 1 times [2022-11-03 02:25:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:30,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757209112] [2022-11-03 02:25:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:30,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:25:31,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:31,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757209112] [2022-11-03 02:25:31,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757209112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:31,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923790659] [2022-11-03 02:25:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:31,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:31,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:31,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:31,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:25:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:31,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:25:31,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923790659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:31,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:31,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:25:31,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554971600] [2022-11-03 02:25:31,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:31,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:31,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:31,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:31,805 INFO L87 Difference]: Start difference. First operand 788 states and 1246 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:25:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:32,072 INFO L93 Difference]: Finished difference Result 2240 states and 3607 transitions. [2022-11-03 02:25:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-03 02:25:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:32,084 INFO L225 Difference]: With dead ends: 2240 [2022-11-03 02:25:32,084 INFO L226 Difference]: Without dead ends: 1464 [2022-11-03 02:25:32,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:32,091 INFO L413 NwaCegarLoop]: 1076 mSDtfsCounter, 591 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:32,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1605 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-11-03 02:25:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1431. [2022-11-03 02:25:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 980 states have (on average 1.5561224489795917) internal successors, (1525), 1039 states have internal predecessors, (1525), 359 states have call successors, (359), 92 states have call predecessors, (359), 91 states have return successors, (392), 339 states have call predecessors, (392), 355 states have call successors, (392) [2022-11-03 02:25:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2276 transitions. [2022-11-03 02:25:32,250 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2276 transitions. Word has length 87 [2022-11-03 02:25:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:32,251 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 2276 transitions. [2022-11-03 02:25:32,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:25:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2276 transitions. [2022-11-03 02:25:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:25:32,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:32,256 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:25:32,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:32,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:32,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:32,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1777778450, now seen corresponding path program 1 times [2022-11-03 02:25:32,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:32,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321712771] [2022-11-03 02:25:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:25:32,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:32,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321712771] [2022-11-03 02:25:32,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321712771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:32,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236171798] [2022-11-03 02:25:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:32,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:32,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:32,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:32,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:25:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:25:33,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:33,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236171798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:33,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:33,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:25:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451179421] [2022-11-03 02:25:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:33,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:33,255 INFO L87 Difference]: Start difference. First operand 1431 states and 2276 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:25:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:33,530 INFO L93 Difference]: Finished difference Result 3095 states and 5008 transitions. [2022-11-03 02:25:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2022-11-03 02:25:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:33,545 INFO L225 Difference]: With dead ends: 3095 [2022-11-03 02:25:33,545 INFO L226 Difference]: Without dead ends: 1676 [2022-11-03 02:25:33,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:33,566 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 104 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:33,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1456 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-11-03 02:25:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1459. [2022-11-03 02:25:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1004 states have (on average 1.546812749003984) internal successors, (1553), 1063 states have internal predecessors, (1553), 363 states have call successors, (363), 92 states have call predecessors, (363), 91 states have return successors, (396), 343 states have call predecessors, (396), 359 states have call successors, (396) [2022-11-03 02:25:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2312 transitions. [2022-11-03 02:25:33,674 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2312 transitions. Word has length 89 [2022-11-03 02:25:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:33,679 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 2312 transitions. [2022-11-03 02:25:33,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:25:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2312 transitions. [2022-11-03 02:25:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:25:33,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:33,682 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:25:33,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:33,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:33,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1784856255, now seen corresponding path program 1 times [2022-11-03 02:25:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855228171] [2022-11-03 02:25:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:33,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:25:34,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855228171] [2022-11-03 02:25:34,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855228171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883527972] [2022-11-03 02:25:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:34,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:34,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:34,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:25:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:25:34,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:34,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883527972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:34,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:34,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:25:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990214595] [2022-11-03 02:25:34,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:34,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:34,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:34,727 INFO L87 Difference]: Start difference. First operand 1459 states and 2312 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:25:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:35,008 INFO L93 Difference]: Finished difference Result 3582 states and 5751 transitions. [2022-11-03 02:25:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-03 02:25:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:35,024 INFO L225 Difference]: With dead ends: 3582 [2022-11-03 02:25:35,024 INFO L226 Difference]: Without dead ends: 2135 [2022-11-03 02:25:35,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:35,035 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 591 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:35,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1643 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-11-03 02:25:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2090. [2022-11-03 02:25:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1442 states have (on average 1.552011095700416) internal successors, (2238), 1530 states have internal predecessors, (2238), 516 states have call successors, (516), 130 states have call predecessors, (516), 131 states have return successors, (572), 489 states have call predecessors, (572), 512 states have call successors, (572) [2022-11-03 02:25:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3326 transitions. [2022-11-03 02:25:35,220 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3326 transitions. Word has length 88 [2022-11-03 02:25:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:35,223 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 3326 transitions. [2022-11-03 02:25:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:25:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3326 transitions. [2022-11-03 02:25:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:25:35,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:35,235 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:25:35,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:35,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 176250410, now seen corresponding path program 1 times [2022-11-03 02:25:35,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:35,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735525228] [2022-11-03 02:25:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:25:35,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:35,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735525228] [2022-11-03 02:25:35,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735525228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:35,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362042546] [2022-11-03 02:25:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:35,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:35,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:35,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:35,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:25:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:25:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:25:36,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:36,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362042546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:36,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:36,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:25:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554740187] [2022-11-03 02:25:36,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:36,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:36,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:25:36,227 INFO L87 Difference]: Start difference. First operand 2090 states and 3326 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:25:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:37,464 INFO L93 Difference]: Finished difference Result 6048 states and 9920 transitions. [2022-11-03 02:25:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:25:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-03 02:25:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:37,495 INFO L225 Difference]: With dead ends: 6048 [2022-11-03 02:25:37,495 INFO L226 Difference]: Without dead ends: 3970 [2022-11-03 02:25:37,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:25:37,520 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 662 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:37,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 3123 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:25:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2022-11-03 02:25:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3942. [2022-11-03 02:25:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 2633 states have (on average 1.4899354348651728) internal successors, (3923), 2854 states have internal predecessors, (3923), 1077 states have call successors, (1077), 232 states have call predecessors, (1077), 231 states have return successors, (1271), 991 states have call predecessors, (1271), 1071 states have call successors, (1271) [2022-11-03 02:25:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 6271 transitions. [2022-11-03 02:25:37,929 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 6271 transitions. Word has length 89 [2022-11-03 02:25:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:37,930 INFO L495 AbstractCegarLoop]: Abstraction has 3942 states and 6271 transitions. [2022-11-03 02:25:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:25:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 6271 transitions. [2022-11-03 02:25:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:25:37,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:37,934 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:25:37,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:38,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:38,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash 10723131, now seen corresponding path program 1 times [2022-11-03 02:25:38,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:38,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542181919] [2022-11-03 02:25:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:38,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:25:38,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:38,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542181919] [2022-11-03 02:25:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542181919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799876970] [2022-11-03 02:25:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:38,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:38,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:25:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:39,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:25:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:25:39,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:39,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799876970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:39,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:39,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-03 02:25:39,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346277621] [2022-11-03 02:25:39,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:39,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:25:39,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:25:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:25:39,493 INFO L87 Difference]: Start difference. First operand 3942 states and 6271 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:25:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:42,232 INFO L93 Difference]: Finished difference Result 9702 states and 15771 transitions. [2022-11-03 02:25:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:25:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-03 02:25:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:42,271 INFO L225 Difference]: With dead ends: 9702 [2022-11-03 02:25:42,271 INFO L226 Difference]: Without dead ends: 5772 [2022-11-03 02:25:42,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:25:42,303 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 1405 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:42,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 2437 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:25:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2022-11-03 02:25:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4326. [2022-11-03 02:25:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 2917 states have (on average 1.4730887898525882) internal successors, (4297), 3146 states have internal predecessors, (4297), 1149 states have call successors, (1149), 264 states have call predecessors, (1149), 259 states have return successors, (1351), 1051 states have call predecessors, (1351), 1143 states have call successors, (1351) [2022-11-03 02:25:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 6797 transitions. [2022-11-03 02:25:42,716 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 6797 transitions. Word has length 94 [2022-11-03 02:25:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:42,716 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 6797 transitions. [2022-11-03 02:25:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:25:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 6797 transitions. [2022-11-03 02:25:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 02:25:42,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:42,720 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:25:42,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:25:42,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1252411982, now seen corresponding path program 1 times [2022-11-03 02:25:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:42,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600357245] [2022-11-03 02:25:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:25:43,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:43,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600357245] [2022-11-03 02:25:43,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600357245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:43,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060183023] [2022-11-03 02:25:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:43,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:43,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:43,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:43,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:25:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:44,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:25:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:25:44,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:44,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060183023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:44,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:44,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-03 02:25:44,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198221454] [2022-11-03 02:25:44,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:44,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:25:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:25:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:25:44,151 INFO L87 Difference]: Start difference. First operand 4326 states and 6797 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:25:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:44,995 INFO L93 Difference]: Finished difference Result 8963 states and 14386 transitions. [2022-11-03 02:25:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:25:44,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 101 [2022-11-03 02:25:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:45,042 INFO L225 Difference]: With dead ends: 8963 [2022-11-03 02:25:45,043 INFO L226 Difference]: Without dead ends: 5502 [2022-11-03 02:25:45,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:25:45,067 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 141 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3959 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:45,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3959 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:25:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2022-11-03 02:25:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 4560. [2022-11-03 02:25:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 3079 states have (on average 1.4670347515427087) internal successors, (4517), 3329 states have internal predecessors, (4517), 1208 states have call successors, (1208), 264 states have call predecessors, (1208), 272 states have return successors, (1450), 1120 states have call predecessors, (1450), 1202 states have call successors, (1450) [2022-11-03 02:25:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 7175 transitions. [2022-11-03 02:25:45,555 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 7175 transitions. Word has length 101 [2022-11-03 02:25:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:45,559 INFO L495 AbstractCegarLoop]: Abstraction has 4560 states and 7175 transitions. [2022-11-03 02:25:45,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:25:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 7175 transitions. [2022-11-03 02:25:45,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:25:45,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:45,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 02:25:45,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:45,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:45,778 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1183091202, now seen corresponding path program 1 times [2022-11-03 02:25:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:45,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565140608] [2022-11-03 02:25:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:25:46,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565140608] [2022-11-03 02:25:46,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565140608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:46,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504358612] [2022-11-03 02:25:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:46,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:46,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:46,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:25:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:25:46,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:25:47,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:25:47,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504358612] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:47,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:25:47,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-03 02:25:47,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706928790] [2022-11-03 02:25:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:25:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:25:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:25:47,411 INFO L87 Difference]: Start difference. First operand 4560 states and 7175 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:25:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:52,263 INFO L93 Difference]: Finished difference Result 12536 states and 21072 transitions. [2022-11-03 02:25:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:25:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-03 02:25:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:52,337 INFO L225 Difference]: With dead ends: 12536 [2022-11-03 02:25:52,337 INFO L226 Difference]: Without dead ends: 9255 [2022-11-03 02:25:52,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:25:52,370 INFO L413 NwaCegarLoop]: 770 mSDtfsCounter, 2490 mSDsluCounter, 2912 mSDsCounter, 0 mSdLazyCounter, 3119 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2584 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 3119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:52,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2584 Valid, 3518 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 3119 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 02:25:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2022-11-03 02:25:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8039. [2022-11-03 02:25:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2845), 1732 states have call predecessors, (2845), 1823 states have call successors, (2845) [2022-11-03 02:25:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12957 transitions. [2022-11-03 02:25:53,180 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12957 transitions. Word has length 103 [2022-11-03 02:25:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:53,180 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 12957 transitions. [2022-11-03 02:25:53,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:25:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12957 transitions. [2022-11-03 02:25:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:25:53,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:53,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 02:25:53,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:53,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2064717840, now seen corresponding path program 1 times [2022-11-03 02:25:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:53,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620182353] [2022-11-03 02:25:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:25:53,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:53,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620182353] [2022-11-03 02:25:53,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620182353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195513937] [2022-11-03 02:25:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:53,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:53,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:53,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:53,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:25:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:25:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:25:54,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:54,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195513937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:54,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:54,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-03 02:25:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500964790] [2022-11-03 02:25:54,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:25:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:25:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:25:54,528 INFO L87 Difference]: Start difference. First operand 8039 states and 12957 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:25:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:55,722 INFO L93 Difference]: Finished difference Result 14813 states and 23958 transitions. [2022-11-03 02:25:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:25:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-03 02:25:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:55,782 INFO L225 Difference]: With dead ends: 14813 [2022-11-03 02:25:55,782 INFO L226 Difference]: Without dead ends: 8061 [2022-11-03 02:25:55,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:25:55,897 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 448 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:55,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2694 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:25:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2022-11-03 02:25:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8039. [2022-11-03 02:25:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2837), 1732 states have call predecessors, (2837), 1823 states have call successors, (2837) [2022-11-03 02:25:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12949 transitions. [2022-11-03 02:25:56,573 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12949 transitions. Word has length 107 [2022-11-03 02:25:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:56,573 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 12949 transitions. [2022-11-03 02:25:56,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:25:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12949 transitions. [2022-11-03 02:25:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:25:56,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:56,579 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:25:56,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:56,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:56,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2060877659, now seen corresponding path program 1 times [2022-11-03 02:25:56,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:56,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229890814] [2022-11-03 02:25:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:56,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:25:57,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229890814] [2022-11-03 02:25:57,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229890814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206869477] [2022-11-03 02:25:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:57,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:57,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:57,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:25:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:25:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:25:58,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:58,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206869477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:58,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:58,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-03 02:25:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837063499] [2022-11-03 02:25:58,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:25:58,422 INFO L87 Difference]: Start difference. First operand 8039 states and 12949 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:26:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:01,004 INFO L93 Difference]: Finished difference Result 27069 states and 47241 transitions. [2022-11-03 02:26:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:26:01,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-11-03 02:26:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:01,129 INFO L225 Difference]: With dead ends: 27069 [2022-11-03 02:26:01,130 INFO L226 Difference]: Without dead ends: 19042 [2022-11-03 02:26:01,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:26:01,183 INFO L413 NwaCegarLoop]: 1027 mSDtfsCounter, 818 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 4447 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:01,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 4447 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:26:01,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19042 states. [2022-11-03 02:26:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19042 to 15950. [2022-11-03 02:26:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 11230 states have (on average 1.4647373107747106) internal successors, (16449), 11810 states have internal predecessors, (16449), 3637 states have call successors, (3637), 997 states have call predecessors, (3637), 1082 states have return successors, (6801), 3388 states have call predecessors, (6801), 3625 states have call successors, (6801) [2022-11-03 02:26:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 26887 transitions. [2022-11-03 02:26:02,683 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 26887 transitions. Word has length 134 [2022-11-03 02:26:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:02,684 INFO L495 AbstractCegarLoop]: Abstraction has 15950 states and 26887 transitions. [2022-11-03 02:26:02,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:26:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 26887 transitions. [2022-11-03 02:26:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:26:02,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:02,691 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2022-11-03 02:26:02,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:02,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:26:02,906 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1772479653, now seen corresponding path program 1 times [2022-11-03 02:26:02,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566149480] [2022-11-03 02:26:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:26:03,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566149480] [2022-11-03 02:26:03,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566149480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:03,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:03,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-03 02:26:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967470741] [2022-11-03 02:26:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:26:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:26:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:26:03,963 INFO L87 Difference]: Start difference. First operand 15950 states and 26887 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-03 02:26:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:15,231 INFO L93 Difference]: Finished difference Result 60500 states and 109628 transitions. [2022-11-03 02:26:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:26:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-03 02:26:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:15,835 INFO L225 Difference]: With dead ends: 60500 [2022-11-03 02:26:15,835 INFO L226 Difference]: Without dead ends: 44562 [2022-11-03 02:26:15,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:26:15,950 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 2855 mSDsluCounter, 4694 mSDsCounter, 0 mSdLazyCounter, 9663 mSolverCounterSat, 1293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2966 SdHoareTripleChecker+Valid, 5142 SdHoareTripleChecker+Invalid, 10956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1293 IncrementalHoareTripleChecker+Valid, 9663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:15,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2966 Valid, 5142 Invalid, 10956 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1293 Valid, 9663 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-03 02:26:15,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44562 states. [2022-11-03 02:26:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44562 to 39067. [2022-11-03 02:26:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39067 states, 28420 states have (on average 1.4686488388458832) internal successors, (41739), 29348 states have internal predecessors, (41739), 7556 states have call successors, (7556), 2813 states have call predecessors, (7556), 3090 states have return successors, (18377), 7331 states have call predecessors, (18377), 7536 states have call successors, (18377) [2022-11-03 02:26:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39067 states to 39067 states and 67672 transitions. [2022-11-03 02:26:20,944 INFO L78 Accepts]: Start accepts. Automaton has 39067 states and 67672 transitions. Word has length 140 [2022-11-03 02:26:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:20,948 INFO L495 AbstractCegarLoop]: Abstraction has 39067 states and 67672 transitions. [2022-11-03 02:26:20,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-03 02:26:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 39067 states and 67672 transitions. [2022-11-03 02:26:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-03 02:26:20,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:20,963 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:20,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:26:20,964 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1926193284, now seen corresponding path program 1 times [2022-11-03 02:26:20,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:20,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855411795] [2022-11-03 02:26:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:20,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:26:21,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:21,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855411795] [2022-11-03 02:26:21,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855411795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:21,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:21,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:21,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884210956] [2022-11-03 02:26:21,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:21,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:21,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:21,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:21,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:21,099 INFO L87 Difference]: Start difference. First operand 39067 states and 67672 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:26:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:25,737 INFO L93 Difference]: Finished difference Result 91217 states and 159810 transitions. [2022-11-03 02:26:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2022-11-03 02:26:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:26,343 INFO L225 Difference]: With dead ends: 91217 [2022-11-03 02:26:26,344 INFO L226 Difference]: Without dead ends: 52162 [2022-11-03 02:26:26,557 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 [2022-11-03 02:26:26,557 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 551 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:26,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1434 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52162 states. [2022-11-03 02:26:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52162 to 51793. [2022-11-03 02:26:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51793 states, 37713 states have (on average 1.4690690212923925) internal successors, (55403), 38959 states have internal predecessors, (55403), 9970 states have call successors, (9970), 3722 states have call predecessors, (9970), 4109 states have return successors, (24445), 9681 states have call predecessors, (24445), 9950 states have call successors, (24445) [2022-11-03 02:26:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51793 states to 51793 states and 89818 transitions. [2022-11-03 02:26:31,306 INFO L78 Accepts]: Start accepts. Automaton has 51793 states and 89818 transitions. Word has length 173 [2022-11-03 02:26:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:31,306 INFO L495 AbstractCegarLoop]: Abstraction has 51793 states and 89818 transitions. [2022-11-03 02:26:31,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:26:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 51793 states and 89818 transitions. [2022-11-03 02:26:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-03 02:26:31,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:31,325 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:26:31,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:26:31,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2016593011, now seen corresponding path program 1 times [2022-11-03 02:26:31,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:31,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245503785] [2022-11-03 02:26:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-03 02:26:31,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245503785] [2022-11-03 02:26:31,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245503785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986031997] [2022-11-03 02:26:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:31,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:31,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:31,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad13466-c268-41dd-8c6a-8b73118a38c6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:26:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:32,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:26:32,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:26:32,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:32,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986031997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:32,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:32,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-11-03 02:26:32,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754221678] [2022-11-03 02:26:32,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:32,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:26:32,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:26:32,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:26:32,210 INFO L87 Difference]: Start difference. First operand 51793 states and 89818 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32)