./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem04_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem04_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl --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 aa468cdeacc2d7780833e7258ebf99c7e35f22152fb9ab283fc568491a2af1a1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:18:33,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:18:33,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:18:33,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:18:33,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:18:33,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:18:33,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:18:33,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:18:33,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:18:33,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:18:33,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:18:33,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:18:33,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:18:33,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:18:33,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:18:33,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:18:33,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:18:33,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:18:33,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:18:33,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:18:33,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:18:33,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:18:33,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:18:33,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:18:33,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:18:33,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:18:33,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:18:33,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:18:33,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:18:33,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:18:33,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:18:33,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:18:33,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:18:33,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:18:33,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:18:33,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:18:33,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:18:33,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:18:33,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:18:33,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:18:33,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:18:33,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:18:33,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:18:33,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:18:33,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:18:33,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:18:33,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:18:33,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:18:33,880 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:18:33,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:18:33,881 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:18:33,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:18:33,881 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:18:33,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:18:33,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:18:33,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:18:33,883 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:18:33,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:18:33,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:18:33,884 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:18:33,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:18:33,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:18:33,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:18:33,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:18:33,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:18:33,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:18:33,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:18:33,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:18:33,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:18:33,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:18:33,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:18:33,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:18:33,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:18:33,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:18:33,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:33,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:18:33,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:18:33,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:18:33,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:18:33,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:18:33,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:18:33,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:18:33,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:18:33,892 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa468cdeacc2d7780833e7258ebf99c7e35f22152fb9ab283fc568491a2af1a1 [2021-11-23 17:18:34,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:18:34,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:18:34,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:18:34,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:18:34,239 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:18:34,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem04_label55.c [2021-11-23 17:18:34,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/fe88d7401/56b0c8ad9c2b44bcba1b81a00558848f/FLAG2bad65f8a [2021-11-23 17:18:35,267 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:18:35,269 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/sv-benchmarks/c/eca-rers2012/Problem04_label55.c [2021-11-23 17:18:35,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/fe88d7401/56b0c8ad9c2b44bcba1b81a00558848f/FLAG2bad65f8a [2021-11-23 17:18:35,721 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/fe88d7401/56b0c8ad9c2b44bcba1b81a00558848f [2021-11-23 17:18:35,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:18:35,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:18:35,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:35,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:18:35,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:18:35,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:35" (1/1) ... [2021-11-23 17:18:35,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636240f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:35, skipping insertion in model container [2021-11-23 17:18:35,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:35" (1/1) ... [2021-11-23 17:18:35,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:18:35,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:18:37,577 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_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/sv-benchmarks/c/eca-rers2012/Problem04_label55.c[178827,178840] [2021-11-23 17:18:37,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:37,625 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:18:38,513 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_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/sv-benchmarks/c/eca-rers2012/Problem04_label55.c[178827,178840] [2021-11-23 17:18:38,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:38,559 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:18:38,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38 WrapperNode [2021-11-23 17:18:38,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:38,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:38,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:18:38,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:18:38,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:38,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:38,888 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5572 [2021-11-23 17:18:38,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:38,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:18:38,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:18:38,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:18:38,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:38,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:38,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:38,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:39,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:39,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:39,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:39,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:18:39,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:18:39,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:18:39,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:18:39,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:38" (1/1) ... [2021-11-23 17:18:39,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:18:39,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:18:39,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:18:39,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:18:39,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:18:39,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:18:39,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:18:39,455 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:18:39,457 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:18:44,270 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:18:44,360 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:18:44,373 INFO L158 Benchmark]: Toolchain (without parser) took 8641.86ms. Allocated memory was 92.3MB in the beginning and 450.9MB in the end (delta: 358.6MB). Free memory was 58.0MB in the beginning and 353.1MB in the end (delta: -295.1MB). Peak memory consumption was 202.4MB. Max. memory is 16.1GB. [2021-11-23 17:18:44,375 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:18:44,377 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2829.96ms. Allocated memory was 92.3MB in the beginning and 127.9MB in the end (delta: 35.7MB). Free memory was 57.6MB in the beginning and 52.7MB in the end (delta: 5.0MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2021-11-23 17:18:44,379 INFO L158 Benchmark]: Boogie Procedure Inliner took 328.48ms. Allocated memory was 127.9MB in the beginning and 195.0MB in the end (delta: 67.1MB). Free memory was 52.7MB in the beginning and 108.5MB in the end (delta: -55.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2021-11-23 17:18:44,380 INFO L158 Benchmark]: Boogie Preprocessor took 326.45ms. Allocated memory is still 195.0MB. Free memory was 108.5MB in the beginning and 108.3MB in the end (delta: 159.7kB). Peak memory consumption was 50.4MB. Max. memory is 16.1GB. [2021-11-23 17:18:44,381 INFO L158 Benchmark]: RCFGBuilder took 5151.63ms. Allocated memory was 195.0MB in the beginning and 450.9MB in the end (delta: 255.9MB). Free memory was 108.3MB in the beginning and 353.1MB in the end (delta: -244.8MB). Peak memory consumption was 149.9MB. Max. memory is 16.1GB. [2021-11-23 17:18:44,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2829.96ms. Allocated memory was 92.3MB in the beginning and 127.9MB in the end (delta: 35.7MB). Free memory was 57.6MB in the beginning and 52.7MB in the end (delta: 5.0MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 328.48ms. Allocated memory was 127.9MB in the beginning and 195.0MB in the end (delta: 67.1MB). Free memory was 52.7MB in the beginning and 108.5MB in the end (delta: -55.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 326.45ms. Allocated memory is still 195.0MB. Free memory was 108.5MB in the beginning and 108.3MB in the end (delta: 159.7kB). Peak memory consumption was 50.4MB. Max. memory is 16.1GB. * RCFGBuilder took 5151.63ms. Allocated memory was 195.0MB in the beginning and 450.9MB in the end (delta: 255.9MB). Free memory was 108.3MB in the beginning and 353.1MB in the end (delta: -244.8MB). Peak memory consumption was 149.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:18:44,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem04_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl --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 aa468cdeacc2d7780833e7258ebf99c7e35f22152fb9ab283fc568491a2af1a1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:18:47,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:18:47,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:18:47,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:18:47,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:18:47,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:18:47,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:18:47,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:18:47,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:18:47,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:18:47,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:18:47,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:18:47,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:18:47,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:18:47,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:18:47,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:18:47,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:18:47,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:18:47,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:18:47,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:18:47,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:18:47,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:18:47,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:18:47,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:18:47,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:18:47,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:18:47,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:18:47,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:18:47,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:18:47,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:18:47,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:18:47,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:18:47,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:18:47,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:18:47,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:18:47,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:18:47,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:18:47,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:18:47,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:18:47,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:18:47,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:18:47,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:18:47,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:18:47,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:18:47,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:18:47,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:18:47,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:18:47,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:18:47,555 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:18:47,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:18:47,556 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:18:47,556 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:18:47,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:18:47,558 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:18:47,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:18:47,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:18:47,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:18:47,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:18:47,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:18:47,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:18:47,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:18:47,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:18:47,563 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:18:47,563 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:18:47,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:18:47,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:18:47,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:18:47,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:18:47,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:18:47,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:18:47,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:18:47,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:47,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:18:47,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:18:47,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:18:47,567 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:18:47,568 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:47,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:18:47,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:18:47,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:18:47,570 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa468cdeacc2d7780833e7258ebf99c7e35f22152fb9ab283fc568491a2af1a1 [2021-11-23 17:18:48,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:18:48,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:18:48,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:18:48,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:18:48,149 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:18:48,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem04_label55.c [2021-11-23 17:18:48,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/5493c8100/a7110f5bde9b45e49a780ae2a0e1febb/FLAG0823eddef [2021-11-23 17:18:49,307 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:18:49,309 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/sv-benchmarks/c/eca-rers2012/Problem04_label55.c [2021-11-23 17:18:49,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/5493c8100/a7110f5bde9b45e49a780ae2a0e1febb/FLAG0823eddef [2021-11-23 17:18:49,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/data/5493c8100/a7110f5bde9b45e49a780ae2a0e1febb [2021-11-23 17:18:49,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:18:49,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:18:49,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:49,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:18:49,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:18:49,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:49" (1/1) ... [2021-11-23 17:18:49,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468aad78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:49, skipping insertion in model container [2021-11-23 17:18:49,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:49" (1/1) ... [2021-11-23 17:18:49,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:18:49,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:18:51,581 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_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/sv-benchmarks/c/eca-rers2012/Problem04_label55.c[178827,178840] [2021-11-23 17:18:51,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:51,630 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:18:52,716 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_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/sv-benchmarks/c/eca-rers2012/Problem04_label55.c[178827,178840] [2021-11-23 17:18:52,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:52,811 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:18:52,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52 WrapperNode [2021-11-23 17:18:52,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:52,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:52,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:18:52,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:18:52,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:52,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,222 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5567 [2021-11-23 17:18:53,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:53,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:18:53,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:18:53,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:18:53,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:18:53,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:18:53,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:18:53,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:18:53,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (1/1) ... [2021-11-23 17:18:53,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:53,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:18:53,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:18:53,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:18:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:18:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:18:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:18:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:18:53,791 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:18:53,805 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:19:00,336 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:19:00,368 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:19:00,368 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:19:00,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:19:00 BoogieIcfgContainer [2021-11-23 17:19:00,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:19:00,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:19:00,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:19:00,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:19:00,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:18:49" (1/3) ... [2021-11-23 17:19:00,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fb4aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:19:00, skipping insertion in model container [2021-11-23 17:19:00,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:52" (2/3) ... [2021-11-23 17:19:00,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fb4aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:19:00, skipping insertion in model container [2021-11-23 17:19:00,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:19:00" (3/3) ... [2021-11-23 17:19:00,385 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label55.c [2021-11-23 17:19:00,391 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:19:00,392 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:19:00,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:19:00,480 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:19:00,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:19:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 885 states, 883 states have (on average 1.9229898074745186) internal successors, (1698), 884 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2021-11-23 17:19:00,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:00,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:00,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash -561385819, now seen corresponding path program 1 times [2021-11-23 17:19:00,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:00,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699518694] [2021-11-23 17:19:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:00,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:00,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:00,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:00,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:19:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:01,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:19:01,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:37,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:37,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:37,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699518694] [2021-11-23 17:19:37,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699518694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:37,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:37,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 17:19:37,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827644854] [2021-11-23 17:19:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:37,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:19:37,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:19:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:19:37,345 INFO L87 Difference]: Start difference. First operand has 885 states, 883 states have (on average 1.9229898074745186) internal successors, (1698), 884 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 12 states, 12 states have (on average 64.5) internal successors, (774), 11 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:49,995 INFO L93 Difference]: Finished difference Result 2490 states and 4835 transitions. [2021-11-23 17:19:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:19:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 64.5) internal successors, (774), 11 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 774 [2021-11-23 17:19:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:50,045 INFO L225 Difference]: With dead ends: 2490 [2021-11-23 17:19:50,046 INFO L226 Difference]: Without dead ends: 1541 [2021-11-23 17:19:50,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 763 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:19:50,058 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 1709 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 10647 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 11358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 10647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:50,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 982 Invalid, 11358 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [711 Valid, 10647 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2021-11-23 17:19:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-11-23 17:19:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1541. [2021-11-23 17:19:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 1.490909090909091) internal successors, (2296), 1540 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2296 transitions. [2021-11-23 17:19:50,242 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2296 transitions. Word has length 774 [2021-11-23 17:19:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:50,247 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 2296 transitions. [2021-11-23 17:19:50,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.5) internal successors, (774), 11 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2296 transitions. [2021-11-23 17:19:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-11-23 17:19:50,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:50,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:50,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:50,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:50,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash -402816186, now seen corresponding path program 1 times [2021-11-23 17:19:50,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:50,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916962619] [2021-11-23 17:19:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:50,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:50,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:50,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:19:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:50,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:19:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:25,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:25,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916962619] [2021-11-23 17:20:25,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916962619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:25,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:25,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 17:20:25,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730368086] [2021-11-23 17:20:25,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:25,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 17:20:25,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 17:20:25,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:20:25,577 INFO L87 Difference]: Start difference. First operand 1541 states and 2296 transitions. Second operand has 13 states, 13 states have (on average 60.69230769230769) internal successors, (789), 12 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:39,136 INFO L93 Difference]: Finished difference Result 3865 states and 6804 transitions. [2021-11-23 17:20:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:20:39,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 60.69230769230769) internal successors, (789), 12 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 789 [2021-11-23 17:20:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:39,167 INFO L225 Difference]: With dead ends: 3865 [2021-11-23 17:20:39,167 INFO L226 Difference]: Without dead ends: 3045 [2021-11-23 17:20:39,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:20:39,172 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 2995 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 11699 mSolverCounterSat, 1767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 13466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1767 IncrementalHoareTripleChecker+Valid, 11699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:39,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2995 Valid, 906 Invalid, 13466 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1767 Valid, 11699 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2021-11-23 17:20:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-11-23 17:20:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 3045. [2021-11-23 17:20:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3045 states, 3044 states have (on average 1.3232588699080157) internal successors, (4028), 3044 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3045 states to 3045 states and 4028 transitions. [2021-11-23 17:20:39,297 INFO L78 Accepts]: Start accepts. Automaton has 3045 states and 4028 transitions. Word has length 789 [2021-11-23 17:20:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:39,299 INFO L470 AbstractCegarLoop]: Abstraction has 3045 states and 4028 transitions. [2021-11-23 17:20:39,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.69230769230769) internal successors, (789), 12 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3045 states and 4028 transitions. [2021-11-23 17:20:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2021-11-23 17:20:39,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:39,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:39,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:39,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:39,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:39,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1730199758, now seen corresponding path program 1 times [2021-11-23 17:20:39,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087710217] [2021-11-23 17:20:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:39,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:39,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:39,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:39,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:20:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:20:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:09,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:09,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087710217] [2021-11-23 17:21:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087710217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:09,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:09,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 17:21:09,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983047468] [2021-11-23 17:21:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:09,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:21:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:21:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:21:09,712 INFO L87 Difference]: Start difference. First operand 3045 states and 4028 transitions. Second operand has 12 states, 12 states have (on average 66.33333333333333) internal successors, (796), 11 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:19,603 INFO L93 Difference]: Finished difference Result 6689 states and 9900 transitions. [2021-11-23 17:21:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:21:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 66.33333333333333) internal successors, (796), 11 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 796 [2021-11-23 17:21:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:19,627 INFO L225 Difference]: With dead ends: 6689 [2021-11-23 17:21:19,627 INFO L226 Difference]: Without dead ends: 4365 [2021-11-23 17:21:19,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 785 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:21:19,632 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 2251 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 6964 mSolverCounterSat, 1559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 8523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1559 IncrementalHoareTripleChecker+Valid, 6964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:19,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 571 Invalid, 8523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1559 Valid, 6964 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 17:21:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-11-23 17:21:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 4365. [2021-11-23 17:21:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4365 states, 4364 states have (on average 1.2942254812098992) internal successors, (5648), 4364 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4365 states to 4365 states and 5648 transitions. [2021-11-23 17:21:19,746 INFO L78 Accepts]: Start accepts. Automaton has 4365 states and 5648 transitions. Word has length 796 [2021-11-23 17:21:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:19,748 INFO L470 AbstractCegarLoop]: Abstraction has 4365 states and 5648 transitions. [2021-11-23 17:21:19,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.33333333333333) internal successors, (796), 11 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4365 states and 5648 transitions. [2021-11-23 17:21:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2021-11-23 17:21:19,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:19,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:19,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:19,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:19,981 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1185029686, now seen corresponding path program 1 times [2021-11-23 17:21:19,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:19,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093880625] [2021-11-23 17:21:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:19,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:19,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:19,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:20,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:21:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:20,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:21:20,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:21:24,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:24,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:24,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093880625] [2021-11-23 17:21:24,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093880625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:24,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:24,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:21:24,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053265625] [2021-11-23 17:21:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:24,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:21:24,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:21:24,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:21:24,220 INFO L87 Difference]: Start difference. First operand 4365 states and 5648 transitions. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:32,706 INFO L93 Difference]: Finished difference Result 12051 states and 16326 transitions. [2021-11-23 17:21:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:21:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 802 [2021-11-23 17:21:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:32,733 INFO L225 Difference]: With dead ends: 12051 [2021-11-23 17:21:32,733 INFO L226 Difference]: Without dead ends: 6750 [2021-11-23 17:21:32,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:21:32,740 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 930 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 1716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1716 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:32,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 46 Invalid, 7172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1716 Valid, 5456 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-23 17:21:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6750 states. [2021-11-23 17:21:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6750 to 6750. [2021-11-23 17:21:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6750 states, 6749 states have (on average 1.0724551785449696) internal successors, (7238), 6749 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6750 states to 6750 states and 7238 transitions. [2021-11-23 17:21:32,903 INFO L78 Accepts]: Start accepts. Automaton has 6750 states and 7238 transitions. Word has length 802 [2021-11-23 17:21:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:32,904 INFO L470 AbstractCegarLoop]: Abstraction has 6750 states and 7238 transitions. [2021-11-23 17:21:32,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6750 states and 7238 transitions. [2021-11-23 17:21:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1057 [2021-11-23 17:21:32,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:32,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:32,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:33,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:33,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash -425073005, now seen corresponding path program 1 times [2021-11-23 17:21:33,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:33,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342478900] [2021-11-23 17:21:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:33,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:33,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:33,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:33,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:21:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:21:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 17:21:35,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:35,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:35,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342478900] [2021-11-23 17:21:35,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342478900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:35,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:35,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:35,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328529581] [2021-11-23 17:21:35,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:35,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:35,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:35,292 INFO L87 Difference]: Start difference. First operand 6750 states and 7238 transitions. Second operand has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:38,849 INFO L93 Difference]: Finished difference Result 15233 states and 16534 transitions. [2021-11-23 17:21:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1056 [2021-11-23 17:21:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:38,899 INFO L225 Difference]: With dead ends: 15233 [2021-11-23 17:21:38,900 INFO L226 Difference]: Without dead ends: 8386 [2021-11-23 17:21:38,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 1054 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:38,910 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 674 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:38,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 969 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 17:21:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8386 states. [2021-11-23 17:21:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8386 to 8386. [2021-11-23 17:21:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8386 states, 8385 states have (on average 1.0671437090041742) internal successors, (8948), 8385 states have internal predecessors, (8948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8386 states to 8386 states and 8948 transitions. [2021-11-23 17:21:39,118 INFO L78 Accepts]: Start accepts. Automaton has 8386 states and 8948 transitions. Word has length 1056 [2021-11-23 17:21:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:39,119 INFO L470 AbstractCegarLoop]: Abstraction has 8386 states and 8948 transitions. [2021-11-23 17:21:39,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8386 states and 8948 transitions. [2021-11-23 17:21:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1121 [2021-11-23 17:21:39,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:39,154 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:39,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:39,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:39,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1582819159, now seen corresponding path program 1 times [2021-11-23 17:21:39,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:39,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508779228] [2021-11-23 17:21:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:39,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:39,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:39,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:39,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:21:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-23 17:21:41,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:41,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:41,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508779228] [2021-11-23 17:21:41,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508779228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:41,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:41,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:41,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397856708] [2021-11-23 17:21:41,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:41,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:41,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:41,457 INFO L87 Difference]: Start difference. First operand 8386 states and 8948 transitions. Second operand has 3 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:45,053 INFO L93 Difference]: Finished difference Result 20141 states and 21728 transitions. [2021-11-23 17:21:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:45,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1120 [2021-11-23 17:21:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:45,100 INFO L225 Difference]: With dead ends: 20141 [2021-11-23 17:21:45,101 INFO L226 Difference]: Without dead ends: 12476 [2021-11-23 17:21:45,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1119 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:45,112 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 758 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:45,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 251 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 17:21:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12476 states. [2021-11-23 17:21:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12476 to 12476. [2021-11-23 17:21:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12476 states, 12475 states have (on average 1.071503006012024) internal successors, (13367), 12475 states have internal predecessors, (13367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12476 states to 12476 states and 13367 transitions. [2021-11-23 17:21:45,361 INFO L78 Accepts]: Start accepts. Automaton has 12476 states and 13367 transitions. Word has length 1120 [2021-11-23 17:21:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:45,362 INFO L470 AbstractCegarLoop]: Abstraction has 12476 states and 13367 transitions. [2021-11-23 17:21:45,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 12476 states and 13367 transitions. [2021-11-23 17:21:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1166 [2021-11-23 17:21:45,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:45,399 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:45,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:45,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:45,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2130707973, now seen corresponding path program 1 times [2021-11-23 17:21:45,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:45,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286987038] [2021-11-23 17:21:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:45,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:45,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:45,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:21:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:21:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 611 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-23 17:21:47,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:47,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:47,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286987038] [2021-11-23 17:21:47,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286987038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:47,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:47,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:47,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565760965] [2021-11-23 17:21:47,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:47,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:47,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:47,672 INFO L87 Difference]: Start difference. First operand 12476 states and 13367 transitions. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:50,540 INFO L93 Difference]: Finished difference Result 26685 states and 28739 transitions. [2021-11-23 17:21:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:50,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1165 [2021-11-23 17:21:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:50,567 INFO L225 Difference]: With dead ends: 26685 [2021-11-23 17:21:50,567 INFO L226 Difference]: Without dead ends: 14930 [2021-11-23 17:21:50,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1164 GetRequests, 1163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:50,578 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 712 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:50,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 981 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 17:21:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14930 states. [2021-11-23 17:21:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14930 to 14930. [2021-11-23 17:21:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14930 states, 14929 states have (on average 1.0683903811373836) internal successors, (15950), 14929 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14930 states to 14930 states and 15950 transitions. [2021-11-23 17:21:50,799 INFO L78 Accepts]: Start accepts. Automaton has 14930 states and 15950 transitions. Word has length 1165 [2021-11-23 17:21:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:50,800 INFO L470 AbstractCegarLoop]: Abstraction has 14930 states and 15950 transitions. [2021-11-23 17:21:50,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 14930 states and 15950 transitions. [2021-11-23 17:21:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1169 [2021-11-23 17:21:50,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:50,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:50,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:51,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:51,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash 163037305, now seen corresponding path program 1 times [2021-11-23 17:21:51,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:51,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250763182] [2021-11-23 17:21:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:51,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:51,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:51,060 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:51,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:21:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:21:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 483 proven. 76 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 17:21:57,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 483 proven. 76 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 17:22:05,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:05,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250763182] [2021-11-23 17:22:05,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250763182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:05,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1515752193] [2021-11-23 17:22:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:05,268 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:22:05,269 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:22:05,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:22:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:22:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 17:22:10,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:10,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1515752193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:10,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:22:10,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2021-11-23 17:22:10,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999143044] [2021-11-23 17:22:10,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:10,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:22:10,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:22:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:22:10,379 INFO L87 Difference]: Start difference. First operand 14930 states and 15950 transitions. Second operand has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:13,749 INFO L93 Difference]: Finished difference Result 33233 states and 35684 transitions. [2021-11-23 17:22:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:22:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1168 [2021-11-23 17:22:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:13,787 INFO L225 Difference]: With dead ends: 33233 [2021-11-23 17:22:13,788 INFO L226 Difference]: Without dead ends: 18206 [2021-11-23 17:22:13,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3501 GetRequests, 3495 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:22:13,804 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 1423 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:13,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1423 Valid, 1076 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 17:22:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18206 states. [2021-11-23 17:22:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18206 to 18202. [2021-11-23 17:22:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18202 states, 18201 states have (on average 1.0580737322125158) internal successors, (19258), 18201 states have internal predecessors, (19258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18202 states to 18202 states and 19258 transitions. [2021-11-23 17:22:14,093 INFO L78 Accepts]: Start accepts. Automaton has 18202 states and 19258 transitions. Word has length 1168 [2021-11-23 17:22:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:14,094 INFO L470 AbstractCegarLoop]: Abstraction has 18202 states and 19258 transitions. [2021-11-23 17:22:14,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 18202 states and 19258 transitions. [2021-11-23 17:22:14,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1192 [2021-11-23 17:22:14,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:14,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:14,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:14,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:14,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:14,539 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 342909631, now seen corresponding path program 1 times [2021-11-23 17:22:14,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:14,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687491819] [2021-11-23 17:22:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:14,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:14,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:14,550 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:14,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:22:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 17:22:17,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:17,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687491819] [2021-11-23 17:22:17,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687491819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:17,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:17,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:17,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138756960] [2021-11-23 17:22:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:17,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:17,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:17,584 INFO L87 Difference]: Start difference. First operand 18202 states and 19258 transitions. Second operand has 3 states, 3 states have (on average 349.0) internal successors, (1047), 2 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:20,650 INFO L93 Difference]: Finished difference Result 40591 states and 43256 transitions. [2021-11-23 17:22:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:20,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 349.0) internal successors, (1047), 2 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1191 [2021-11-23 17:22:20,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:20,759 INFO L225 Difference]: With dead ends: 40591 [2021-11-23 17:22:20,759 INFO L226 Difference]: Without dead ends: 23110 [2021-11-23 17:22:20,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1189 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:20,775 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 552 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:20,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 346 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 17:22:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23110 states. [2021-11-23 17:22:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23110 to 23110. [2021-11-23 17:22:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23110 states, 23109 states have (on average 1.0490285170279978) internal successors, (24242), 23109 states have internal predecessors, (24242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23110 states to 23110 states and 24242 transitions. [2021-11-23 17:22:21,096 INFO L78 Accepts]: Start accepts. Automaton has 23110 states and 24242 transitions. Word has length 1191 [2021-11-23 17:22:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:21,097 INFO L470 AbstractCegarLoop]: Abstraction has 23110 states and 24242 transitions. [2021-11-23 17:22:21,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 349.0) internal successors, (1047), 2 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 23110 states and 24242 transitions. [2021-11-23 17:22:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1196 [2021-11-23 17:22:21,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:21,136 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:21,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:21,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:21,352 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 769131074, now seen corresponding path program 1 times [2021-11-23 17:22:21,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:21,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081068322] [2021-11-23 17:22:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:21,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:21,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:21,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:22:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:21,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:21,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 579 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 17:22:23,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:23,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:23,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081068322] [2021-11-23 17:22:23,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081068322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:23,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:23,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:22:23,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241896066] [2021-11-23 17:22:23,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:23,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:23,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:23,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:23,162 INFO L87 Difference]: Start difference. First operand 23110 states and 24242 transitions. Second operand has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:26,510 INFO L93 Difference]: Finished difference Result 56133 states and 59253 transitions. [2021-11-23 17:22:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1195 [2021-11-23 17:22:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:26,551 INFO L225 Difference]: With dead ends: 56133 [2021-11-23 17:22:26,551 INFO L226 Difference]: Without dead ends: 32926 [2021-11-23 17:22:26,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1194 GetRequests, 1193 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:26,568 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 682 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:26,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 312 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 17:22:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32926 states. [2021-11-23 17:22:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32926 to 32926. [2021-11-23 17:22:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32926 states, 32925 states have (on average 1.0461351556567957) internal successors, (34444), 32925 states have internal predecessors, (34444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32926 states to 32926 states and 34444 transitions. [2021-11-23 17:22:27,010 INFO L78 Accepts]: Start accepts. Automaton has 32926 states and 34444 transitions. Word has length 1195 [2021-11-23 17:22:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:27,011 INFO L470 AbstractCegarLoop]: Abstraction has 32926 states and 34444 transitions. [2021-11-23 17:22:27,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32926 states and 34444 transitions. [2021-11-23 17:22:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2021-11-23 17:22:27,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:27,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:27,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:27,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:27,284 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash 8378656, now seen corresponding path program 1 times [2021-11-23 17:22:27,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:27,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850489533] [2021-11-23 17:22:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:27,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:27,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:27,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:22:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:27,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:22:27,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-23 17:23:10,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:10,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:10,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850489533] [2021-11-23 17:23:10,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850489533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:10,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:10,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 17:23:10,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883437397] [2021-11-23 17:23:10,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:10,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:23:10,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:10,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:23:10,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:23:10,297 INFO L87 Difference]: Start difference. First operand 32926 states and 34444 transitions. Second operand has 12 states, 12 states have (on average 88.08333333333333) internal successors, (1057), 12 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:18,569 INFO L93 Difference]: Finished difference Result 65872 states and 68927 transitions. [2021-11-23 17:23:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:23:18,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 88.08333333333333) internal successors, (1057), 12 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1222 [2021-11-23 17:23:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:18,610 INFO L225 Difference]: With dead ends: 65872 [2021-11-23 17:23:18,610 INFO L226 Difference]: Without dead ends: 33251 [2021-11-23 17:23:18,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 1212 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:23:18,630 INFO L933 BasicCegarLoop]: 1068 mSDtfsCounter, 2214 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 8346 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2214 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 8368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 8346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:18,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2214 Valid, 1129 Invalid, 8368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 8346 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 17:23:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33251 states. [2021-11-23 17:23:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33251 to 33251. [2021-11-23 17:23:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33251 states, 33250 states have (on average 1.0456842105263158) internal successors, (34769), 33250 states have internal predecessors, (34769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33251 states to 33251 states and 34769 transitions. [2021-11-23 17:23:19,148 INFO L78 Accepts]: Start accepts. Automaton has 33251 states and 34769 transitions. Word has length 1222 [2021-11-23 17:23:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 33251 states and 34769 transitions. [2021-11-23 17:23:19,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.08333333333333) internal successors, (1057), 12 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 33251 states and 34769 transitions. [2021-11-23 17:23:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1391 [2021-11-23 17:23:19,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:19,205 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:19,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:19,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:19,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 101512679, now seen corresponding path program 1 times [2021-11-23 17:23:19,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:19,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673862503] [2021-11-23 17:23:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:19,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:19,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:19,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:19,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:23:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 658 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-23 17:23:21,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:21,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:21,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673862503] [2021-11-23 17:23:21,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673862503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:21,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:21,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444135714] [2021-11-23 17:23:21,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:21,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:21,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:21,603 INFO L87 Difference]: Start difference. First operand 33251 states and 34769 transitions. Second operand has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:24,950 INFO L93 Difference]: Finished difference Result 87049 states and 91449 transitions. [2021-11-23 17:23:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1390 [2021-11-23 17:23:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:25,008 INFO L225 Difference]: With dead ends: 87049 [2021-11-23 17:23:25,008 INFO L226 Difference]: Without dead ends: 54519 [2021-11-23 17:23:25,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1389 GetRequests, 1388 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:25,029 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 665 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:25,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 211 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 17:23:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54519 states. [2021-11-23 17:23:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54519 to 53701. [2021-11-23 17:23:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53701 states, 53700 states have (on average 1.0394785847299814) internal successors, (55820), 53700 states have internal predecessors, (55820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53701 states to 53701 states and 55820 transitions. [2021-11-23 17:23:25,636 INFO L78 Accepts]: Start accepts. Automaton has 53701 states and 55820 transitions. Word has length 1390 [2021-11-23 17:23:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:25,636 INFO L470 AbstractCegarLoop]: Abstraction has 53701 states and 55820 transitions. [2021-11-23 17:23:25,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 53701 states and 55820 transitions. [2021-11-23 17:23:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1518 [2021-11-23 17:23:25,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:25,701 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:25,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:23:25,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:25,904 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1179254419, now seen corresponding path program 1 times [2021-11-23 17:23:25,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:25,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767987598] [2021-11-23 17:23:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:25,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:25,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:25,914 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:25,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:23:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:26,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:23:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-11-23 17:24:14,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:14,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:14,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767987598] [2021-11-23 17:24:14,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767987598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:14,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:14,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 17:24:14,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013408092] [2021-11-23 17:24:14,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:14,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 17:24:14,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 17:24:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:24:14,015 INFO L87 Difference]: Start difference. First operand 53701 states and 55820 transitions. Second operand has 13 states, 13 states have (on average 93.76923076923077) internal successors, (1219), 12 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:21,880 INFO L93 Difference]: Finished difference Result 106579 states and 110810 transitions. [2021-11-23 17:24:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:24:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 93.76923076923077) internal successors, (1219), 12 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1517 [2021-11-23 17:24:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:21,948 INFO L225 Difference]: With dead ends: 106579 [2021-11-23 17:24:21,949 INFO L226 Difference]: Without dead ends: 53075 [2021-11-23 17:24:21,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1505 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:24:21,968 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 2353 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 7959 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2353 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 8073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 7959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:21,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2353 Valid, 233 Invalid, 8073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 7959 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 17:24:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53075 states. [2021-11-23 17:24:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53075 to 53075. [2021-11-23 17:24:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53075 states, 53074 states have (on average 1.0395108716132193) internal successors, (55171), 53074 states have internal predecessors, (55171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53075 states to 53075 states and 55171 transitions. [2021-11-23 17:24:22,509 INFO L78 Accepts]: Start accepts. Automaton has 53075 states and 55171 transitions. Word has length 1517 [2021-11-23 17:24:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:22,510 INFO L470 AbstractCegarLoop]: Abstraction has 53075 states and 55171 transitions. [2021-11-23 17:24:22,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 93.76923076923077) internal successors, (1219), 12 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 53075 states and 55171 transitions. [2021-11-23 17:24:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1576 [2021-11-23 17:24:22,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:22,569 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:22,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:22,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:22,772 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1338697085, now seen corresponding path program 1 times [2021-11-23 17:24:22,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:22,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885584191] [2021-11-23 17:24:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:22,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:22,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:22,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:22,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:24:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:23,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:24:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 923 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-23 17:24:25,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:25,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885584191] [2021-11-23 17:24:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885584191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:25,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:25,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:25,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868001628] [2021-11-23 17:24:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:25,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:25,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:25,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:25,385 INFO L87 Difference]: Start difference. First operand 53075 states and 55171 transitions. Second operand has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:28,531 INFO L93 Difference]: Finished difference Result 112791 states and 117624 transitions. [2021-11-23 17:24:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1575 [2021-11-23 17:24:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:28,594 INFO L225 Difference]: With dead ends: 112791 [2021-11-23 17:24:28,594 INFO L226 Difference]: Without dead ends: 60437 [2021-11-23 17:24:28,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1574 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:28,615 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 795 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:28,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 1055 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 17:24:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60437 states. [2021-11-23 17:24:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60437 to 60437. [2021-11-23 17:24:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60437 states, 60436 states have (on average 1.0385697266529883) internal successors, (62767), 60436 states have internal predecessors, (62767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60437 states to 60437 states and 62767 transitions. [2021-11-23 17:24:29,836 INFO L78 Accepts]: Start accepts. Automaton has 60437 states and 62767 transitions. Word has length 1575 [2021-11-23 17:24:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:29,837 INFO L470 AbstractCegarLoop]: Abstraction has 60437 states and 62767 transitions. [2021-11-23 17:24:29,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 60437 states and 62767 transitions. [2021-11-23 17:24:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1612 [2021-11-23 17:24:30,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:30,039 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:30,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:30,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:30,253 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash 82099911, now seen corresponding path program 1 times [2021-11-23 17:24:30,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245604132] [2021-11-23 17:24:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:30,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:30,267 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:30,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:24:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:30,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:24:30,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2043 backedges. 1429 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-23 17:24:33,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:33,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245604132] [2021-11-23 17:24:33,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245604132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:33,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:33,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:33,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16746784] [2021-11-23 17:24:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:33,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:33,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:33,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:33,088 INFO L87 Difference]: Start difference. First operand 60437 states and 62767 transitions. Second operand has 3 states, 3 states have (on average 378.3333333333333) internal successors, (1135), 3 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:36,602 INFO L93 Difference]: Finished difference Result 132423 states and 138077 transitions. [2021-11-23 17:24:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:36,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 378.3333333333333) internal successors, (1135), 3 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1611 [2021-11-23 17:24:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:36,692 INFO L225 Difference]: With dead ends: 132423 [2021-11-23 17:24:36,692 INFO L226 Difference]: Without dead ends: 72707 [2021-11-23 17:24:36,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1610 GetRequests, 1609 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:36,721 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 693 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:36,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 1072 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 17:24:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72707 states. [2021-11-23 17:24:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72707 to 72707. [2021-11-23 17:24:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72707 states, 72706 states have (on average 1.0351002668280471) internal successors, (75258), 72706 states have internal predecessors, (75258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72707 states to 72707 states and 75258 transitions. [2021-11-23 17:24:37,994 INFO L78 Accepts]: Start accepts. Automaton has 72707 states and 75258 transitions. Word has length 1611 [2021-11-23 17:24:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:37,995 INFO L470 AbstractCegarLoop]: Abstraction has 72707 states and 75258 transitions. [2021-11-23 17:24:37,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 378.3333333333333) internal successors, (1135), 3 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 72707 states and 75258 transitions. [2021-11-23 17:24:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1613 [2021-11-23 17:24:38,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:38,101 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:38,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 17:24:38,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:38,302 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:38,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash -765770462, now seen corresponding path program 1 times [2021-11-23 17:24:38,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624665906] [2021-11-23 17:24:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:38,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:38,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:38,314 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:38,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:24:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:38,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1944 backedges. 1405 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-23 17:24:40,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:40,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624665906] [2021-11-23 17:24:40,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624665906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:40,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:40,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:40,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745759339] [2021-11-23 17:24:40,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:40,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:40,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:40,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:40,917 INFO L87 Difference]: Start difference. First operand 72707 states and 75258 transitions. Second operand has 3 states, 3 states have (on average 387.3333333333333) internal successors, (1162), 3 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:44,823 INFO L93 Difference]: Finished difference Result 165961 states and 172326 transitions. [2021-11-23 17:24:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 387.3333333333333) internal successors, (1162), 3 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1612 [2021-11-23 17:24:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:44,953 INFO L225 Difference]: With dead ends: 165961 [2021-11-23 17:24:44,953 INFO L226 Difference]: Without dead ends: 93975 [2021-11-23 17:24:44,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1611 GetRequests, 1610 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:44,976 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 668 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:44,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1073 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 17:24:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93975 states. [2021-11-23 17:24:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93975 to 93157. [2021-11-23 17:24:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93157 states, 93156 states have (on average 1.0304650264073167) internal successors, (95994), 93156 states have internal predecessors, (95994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93157 states to 93157 states and 95994 transitions. [2021-11-23 17:24:46,612 INFO L78 Accepts]: Start accepts. Automaton has 93157 states and 95994 transitions. Word has length 1612 [2021-11-23 17:24:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:46,613 INFO L470 AbstractCegarLoop]: Abstraction has 93157 states and 95994 transitions. [2021-11-23 17:24:46,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 387.3333333333333) internal successors, (1162), 3 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 93157 states and 95994 transitions. [2021-11-23 17:24:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1721 [2021-11-23 17:24:46,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:46,765 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:46,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 17:24:46,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:46,969 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1315236055, now seen corresponding path program 1 times [2021-11-23 17:24:46,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:46,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917756853] [2021-11-23 17:24:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:46,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:46,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:46,982 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:46,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:24:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:47,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 1336 proven. 0 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2021-11-23 17:24:49,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:49,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:49,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917756853] [2021-11-23 17:24:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917756853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:49,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:49,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:49,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956952798] [2021-11-23 17:24:49,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:49,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:49,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:49,713 INFO L87 Difference]: Start difference. First operand 93157 states and 95994 transitions. Second operand has 3 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:53,641 INFO L93 Difference]: Finished difference Result 198681 states and 205319 transitions. [2021-11-23 17:24:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1720 [2021-11-23 17:24:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:53,764 INFO L225 Difference]: With dead ends: 198681 [2021-11-23 17:24:53,764 INFO L226 Difference]: Without dead ends: 105427 [2021-11-23 17:24:53,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1719 GetRequests, 1718 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:53,809 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 714 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:53,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 973 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 17:24:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105427 states. [2021-11-23 17:24:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105427 to 104609. [2021-11-23 17:24:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104609 states, 104608 states have (on average 1.0264798103395534) internal successors, (107378), 104608 states have internal predecessors, (107378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104609 states to 104609 states and 107378 transitions. [2021-11-23 17:24:55,342 INFO L78 Accepts]: Start accepts. Automaton has 104609 states and 107378 transitions. Word has length 1720 [2021-11-23 17:24:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:55,343 INFO L470 AbstractCegarLoop]: Abstraction has 104609 states and 107378 transitions. [2021-11-23 17:24:55,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 104609 states and 107378 transitions. [2021-11-23 17:24:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1725 [2021-11-23 17:24:55,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:55,740 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:55,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:55,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:55,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash 957098869, now seen corresponding path program 1 times [2021-11-23 17:24:55,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:55,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724642189] [2021-11-23 17:24:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:55,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:55,968 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:56,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:24:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:24:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1780 proven. 202 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:25:02,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1780 proven. 202 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:25:10,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:10,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724642189] [2021-11-23 17:25:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724642189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:10,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125807577] [2021-11-23 17:25:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:10,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:10,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:10,543 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:10,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:25:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:11,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1591 proven. 0 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2021-11-23 17:25:13,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:13,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125807577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:13,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:25:13,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 6] total 8 [2021-11-23 17:25:13,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334520248] [2021-11-23 17:25:13,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:13,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:13,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:13,724 INFO L87 Difference]: Start difference. First operand 104609 states and 107378 transitions. Second operand has 3 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:17,357 INFO L93 Difference]: Finished difference Result 218313 states and 224158 transitions. [2021-11-23 17:25:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1724 [2021-11-23 17:25:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:17,492 INFO L225 Difference]: With dead ends: 218313 [2021-11-23 17:25:17,492 INFO L226 Difference]: Without dead ends: 114425 [2021-11-23 17:25:17,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5169 GetRequests, 5163 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:17,537 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 525 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:17,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 945 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 17:25:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114425 states. [2021-11-23 17:25:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114425 to 111971. [2021-11-23 17:25:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111971 states, 111970 states have (on average 1.0239260516209698) internal successors, (114649), 111970 states have internal predecessors, (114649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111971 states to 111971 states and 114649 transitions. [2021-11-23 17:25:19,312 INFO L78 Accepts]: Start accepts. Automaton has 111971 states and 114649 transitions. Word has length 1724 [2021-11-23 17:25:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:19,313 INFO L470 AbstractCegarLoop]: Abstraction has 111971 states and 114649 transitions. [2021-11-23 17:25:19,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 111971 states and 114649 transitions. [2021-11-23 17:25:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1774 [2021-11-23 17:25:19,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:19,447 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:19,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:19,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-23 17:25:19,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash 426666259, now seen corresponding path program 1 times [2021-11-23 17:25:19,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:19,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785554784] [2021-11-23 17:25:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:19,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:19,865 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:19,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:25:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:20,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2414 backedges. 1585 proven. 0 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2021-11-23 17:25:22,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:22,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785554784] [2021-11-23 17:25:22,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785554784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:22,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:22,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:22,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557681772] [2021-11-23 17:25:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:22,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:22,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:22,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:22,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:22,906 INFO L87 Difference]: Start difference. First operand 111971 states and 114649 transitions. Second operand has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:26,653 INFO L93 Difference]: Finished difference Result 226493 states and 232175 transitions. [2021-11-23 17:25:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1773 [2021-11-23 17:25:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:26,786 INFO L225 Difference]: With dead ends: 226493 [2021-11-23 17:25:26,786 INFO L226 Difference]: Without dead ends: 115243 [2021-11-23 17:25:26,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1772 GetRequests, 1771 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:26,835 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 797 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:26,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 987 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 17:25:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115243 states. [2021-11-23 17:25:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115243 to 115243. [2021-11-23 17:25:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115243 states, 115242 states have (on average 1.0202009683969386) internal successors, (117570), 115242 states have internal predecessors, (117570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115243 states to 115243 states and 117570 transitions. [2021-11-23 17:25:28,788 INFO L78 Accepts]: Start accepts. Automaton has 115243 states and 117570 transitions. Word has length 1773 [2021-11-23 17:25:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:28,789 INFO L470 AbstractCegarLoop]: Abstraction has 115243 states and 117570 transitions. [2021-11-23 17:25:28,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 115243 states and 117570 transitions. [2021-11-23 17:25:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1829 [2021-11-23 17:25:28,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:28,958 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:28,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:29,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:29,161 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1388153906, now seen corresponding path program 1 times [2021-11-23 17:25:29,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326032294] [2021-11-23 17:25:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:29,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:29,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:29,176 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:29,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:25:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 1690 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-23 17:25:32,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:32,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:32,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326032294] [2021-11-23 17:25:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326032294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:32,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944138171] [2021-11-23 17:25:32,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:32,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:32,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:32,349 INFO L87 Difference]: Start difference. First operand 115243 states and 117570 transitions. Second operand has 3 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:36,133 INFO L93 Difference]: Finished difference Result 228129 states and 232641 transitions. [2021-11-23 17:25:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:36,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1828 [2021-11-23 17:25:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:36,270 INFO L225 Difference]: With dead ends: 228129 [2021-11-23 17:25:36,270 INFO L226 Difference]: Without dead ends: 112789 [2021-11-23 17:25:36,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1827 GetRequests, 1826 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:36,318 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 668 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:36,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 271 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 17:25:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112789 states. [2021-11-23 17:25:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112789 to 110335. [2021-11-23 17:25:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110335 states, 110334 states have (on average 1.0134772599561332) internal successors, (111821), 110334 states have internal predecessors, (111821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110335 states to 110335 states and 111821 transitions. [2021-11-23 17:25:38,242 INFO L78 Accepts]: Start accepts. Automaton has 110335 states and 111821 transitions. Word has length 1828 [2021-11-23 17:25:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:38,243 INFO L470 AbstractCegarLoop]: Abstraction has 110335 states and 111821 transitions. [2021-11-23 17:25:38,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 110335 states and 111821 transitions. [2021-11-23 17:25:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2523 [2021-11-23 17:25:38,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:38,443 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:25:38,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:38,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:38,645 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1136845450, now seen corresponding path program 1 times [2021-11-23 17:25:38,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:38,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323284655] [2021-11-23 17:25:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:38,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:38,663 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:38,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:25:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:39,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4279 backedges. 2429 proven. 0 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2021-11-23 17:25:42,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:42,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:42,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323284655] [2021-11-23 17:25:42,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323284655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:42,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:42,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:42,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063079825] [2021-11-23 17:25:42,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:42,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:42,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:42,640 INFO L87 Difference]: Start difference. First operand 110335 states and 111821 transitions. Second operand has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:46,190 INFO L93 Difference]: Finished difference Result 234673 states and 237913 transitions. [2021-11-23 17:25:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:46,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2522 [2021-11-23 17:25:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:46,307 INFO L225 Difference]: With dead ends: 234673 [2021-11-23 17:25:46,307 INFO L226 Difference]: Without dead ends: 114425 [2021-11-23 17:25:46,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2521 GetRequests, 2520 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:46,356 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 768 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:46,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1038 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 17:25:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114425 states. [2021-11-23 17:25:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114425 to 114425. [2021-11-23 17:25:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114425 states, 114424 states have (on average 1.0114923442634411) internal successors, (115739), 114424 states have internal predecessors, (115739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114425 states to 114425 states and 115739 transitions. [2021-11-23 17:25:48,042 INFO L78 Accepts]: Start accepts. Automaton has 114425 states and 115739 transitions. Word has length 2522 [2021-11-23 17:25:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:48,043 INFO L470 AbstractCegarLoop]: Abstraction has 114425 states and 115739 transitions. [2021-11-23 17:25:48,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:48,043 INFO L276 IsEmpty]: Start isEmpty. Operand 114425 states and 115739 transitions. [2021-11-23 17:25:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4287 [2021-11-23 17:25:48,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:48,680 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:48,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:48,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:48,894 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -468955319, now seen corresponding path program 1 times [2021-11-23 17:25:48,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:48,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670799817] [2021-11-23 17:25:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:48,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:48,924 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:48,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:25:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 4527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14701 backedges. 8216 proven. 0 refuted. 0 times theorem prover too weak. 6485 trivial. 0 not checked. [2021-11-23 17:25:55,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:55,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:55,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670799817] [2021-11-23 17:25:55,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670799817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:55,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:55,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:55,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506250732] [2021-11-23 17:25:55,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:55,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:55,495 INFO L87 Difference]: Start difference. First operand 114425 states and 115739 transitions. Second operand has 3 states, 3 states have (on average 499.3333333333333) internal successors, (1498), 3 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:58,947 INFO L93 Difference]: Finished difference Result 228129 states and 230754 transitions. [2021-11-23 17:25:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 499.3333333333333) internal successors, (1498), 3 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4286 [2021-11-23 17:25:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:59,062 INFO L225 Difference]: With dead ends: 228129 [2021-11-23 17:25:59,062 INFO L226 Difference]: Without dead ends: 114425 [2021-11-23 17:25:59,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4285 GetRequests, 4284 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:59,113 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 585 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:59,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 892 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 17:25:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114425 states. [2021-11-23 17:26:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114425 to 114425. [2021-11-23 17:26:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114425 states, 114424 states have (on average 1.010574704607425) internal successors, (115634), 114424 states have internal predecessors, (115634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114425 states to 114425 states and 115634 transitions. [2021-11-23 17:26:01,095 INFO L78 Accepts]: Start accepts. Automaton has 114425 states and 115634 transitions. Word has length 4286 [2021-11-23 17:26:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:01,096 INFO L470 AbstractCegarLoop]: Abstraction has 114425 states and 115634 transitions. [2021-11-23 17:26:01,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 499.3333333333333) internal successors, (1498), 3 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 114425 states and 115634 transitions. [2021-11-23 17:26:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5819 [2021-11-23 17:26:01,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:01,725 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:01,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-23 17:26:01,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:01,927 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1281477518, now seen corresponding path program 1 times [2021-11-23 17:26:01,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:01,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558558113] [2021-11-23 17:26:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:01,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:01,965 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:01,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1c7383-f7e2-4716-86fc-6fb6f4d04173/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process