./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label34.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_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/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_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/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_a1791d64-6a1a-45c2-94d4-72c190b3b944/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 e1cbdf83c230cb7b5e875433a1d81cdf13003742b706b294fab4c2a4e0869f21 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:23:20,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:23:20,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:23:20,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:23:20,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:23:20,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:23:20,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:23:20,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:23:20,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:23:20,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:23:20,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:23:20,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:23:20,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:23:20,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:23:20,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:23:20,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:23:20,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:23:20,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:23:20,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:23:20,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:23:20,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:23:20,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:23:20,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:23:20,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:23:20,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:23:20,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:23:20,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:23:20,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:23:20,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:23:20,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:23:20,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:23:20,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:23:20,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:23:20,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:23:20,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:23:20,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:23:20,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:23:20,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:23:20,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:23:20,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:23:20,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:23:20,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:23:20,863 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:23:20,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:23:20,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:23:20,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:23:20,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:23:20,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:23:20,865 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:23:20,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:23:20,866 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:23:20,866 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:23:20,866 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:23:20,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:23:20,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:23:20,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:23:20,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:23:20,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:23:20,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:23:20,868 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:23:20,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:23:20,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:23:20,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:23:20,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:23:20,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:23:20,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:23:20,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:23:20,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:23:20,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:23:20,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:23:20,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:23:20,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:23:20,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:23:20,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:23:20,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:23:20,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:23:20,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:23:20,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:23:20,873 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:23:20,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:23:20,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:23:20,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:23:20,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:23:20,874 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_a1791d64-6a1a-45c2-94d4-72c190b3b944/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1cbdf83c230cb7b5e875433a1d81cdf13003742b706b294fab4c2a4e0869f21 [2021-11-23 17:23:21,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:23:21,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:23:21,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:23:21,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:23:21,217 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:23:21,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label34.c [2021-11-23 17:23:21,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/587a9786d/02079e37934a452c9a4e8e944bdccc6f/FLAG6fe4b46d3 [2021-11-23 17:23:22,212 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:23:22,213 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/sv-benchmarks/c/eca-rers2012/Problem18_label34.c [2021-11-23 17:23:22,260 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/587a9786d/02079e37934a452c9a4e8e944bdccc6f/FLAG6fe4b46d3 [2021-11-23 17:23:22,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/587a9786d/02079e37934a452c9a4e8e944bdccc6f [2021-11-23 17:23:22,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:23:22,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:23:22,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:23:22,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:23:22,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:23:22,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:22" (1/1) ... [2021-11-23 17:23:22,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4262df8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:22, skipping insertion in model container [2021-11-23 17:23:22,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:22" (1/1) ... [2021-11-23 17:23:22,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:23:22,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:23:23,149 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_a1791d64-6a1a-45c2-94d4-72c190b3b944/sv-benchmarks/c/eca-rers2012/Problem18_label34.c[1169,1182] [2021-11-23 17:23:24,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:23:24,414 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:23:24,435 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_a1791d64-6a1a-45c2-94d4-72c190b3b944/sv-benchmarks/c/eca-rers2012/Problem18_label34.c[1169,1182] [2021-11-23 17:23:25,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:23:25,029 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:23:25,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25 WrapperNode [2021-11-23 17:23:25,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:23:25,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:23:25,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:23:25,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:23:25,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,399 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-11-23 17:23:25,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:23:25,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:23:25,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:23:25,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:23:25,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:23:25,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:23:25,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:23:25,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:23:25,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:25" (1/1) ... [2021-11-23 17:23:25,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:23:25,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:25,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:23:25,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:23:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:23:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:23:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:23:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:23:25,902 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:23:25,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:23:30,049 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:23:30,120 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 17:23:30,133 INFO L158 Benchmark]: Toolchain (without parser) took 7397.70ms. Allocated memory was 102.8MB in the beginning and 331.4MB in the end (delta: 228.6MB). Free memory was 73.6MB in the beginning and 156.4MB in the end (delta: -82.8MB). Peak memory consumption was 153.6MB. Max. memory is 16.1GB. [2021-11-23 17:23:30,135 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory was 79.7MB in the beginning and 79.6MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:23:30,137 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2296.78ms. Allocated memory was 102.8MB in the beginning and 134.2MB in the end (delta: 31.5MB). Free memory was 73.3MB in the beginning and 70.1MB in the end (delta: 3.3MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. [2021-11-23 17:23:30,138 INFO L158 Benchmark]: Boogie Procedure Inliner took 369.52ms. Allocated memory is still 134.2MB. Free memory was 70.1MB in the beginning and 57.4MB in the end (delta: 12.7MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. [2021-11-23 17:23:30,140 INFO L158 Benchmark]: Boogie Preprocessor took 322.95ms. Allocated memory was 134.2MB in the beginning and 184.5MB in the end (delta: 50.3MB). Free memory was 57.4MB in the beginning and 102.1MB in the end (delta: -44.8MB). Peak memory consumption was 30.6MB. Max. memory is 16.1GB. [2021-11-23 17:23:30,142 INFO L158 Benchmark]: RCFGBuilder took 4402.50ms. Allocated memory was 184.5MB in the beginning and 331.4MB in the end (delta: 146.8MB). Free memory was 102.1MB in the beginning and 156.4MB in the end (delta: -54.2MB). Peak memory consumption was 102.4MB. Max. memory is 16.1GB. [2021-11-23 17:23:30,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory was 79.7MB in the beginning and 79.6MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2296.78ms. Allocated memory was 102.8MB in the beginning and 134.2MB in the end (delta: 31.5MB). Free memory was 73.3MB in the beginning and 70.1MB in the end (delta: 3.3MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 369.52ms. Allocated memory is still 134.2MB. Free memory was 70.1MB in the beginning and 57.4MB in the end (delta: 12.7MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 322.95ms. Allocated memory was 134.2MB in the beginning and 184.5MB in the end (delta: 50.3MB). Free memory was 57.4MB in the beginning and 102.1MB in the end (delta: -44.8MB). Peak memory consumption was 30.6MB. Max. memory is 16.1GB. * RCFGBuilder took 4402.50ms. Allocated memory was 184.5MB in the beginning and 331.4MB in the end (delta: 146.8MB). Free memory was 102.1MB in the beginning and 156.4MB in the end (delta: -54.2MB). Peak memory consumption was 102.4MB. 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 17:23:30,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/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_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/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_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/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_a1791d64-6a1a-45c2-94d4-72c190b3b944/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 e1cbdf83c230cb7b5e875433a1d81cdf13003742b706b294fab4c2a4e0869f21 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:23:33,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:23:33,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:23:33,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:23:33,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:23:33,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:23:33,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:23:33,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:23:33,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:23:33,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:23:33,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:23:33,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:23:33,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:23:33,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:23:33,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:23:33,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:23:33,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:23:33,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:23:33,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:23:33,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:23:33,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:23:33,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:23:33,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:23:33,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:23:33,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:23:33,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:23:33,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:23:33,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:23:33,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:23:33,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:23:33,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:23:33,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:23:33,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:23:33,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:23:33,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:23:33,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:23:33,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:23:33,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:23:33,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:23:33,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:23:33,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:23:33,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:23:33,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:23:33,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:23:33,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:23:33,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:23:33,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:23:33,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:23:33,314 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:23:33,314 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:23:33,314 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:23:33,314 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:23:33,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:23:33,316 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:23:33,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:23:33,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:23:33,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:23:33,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:23:33,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:23:33,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:23:33,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:23:33,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:23:33,319 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:23:33,320 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:23:33,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:23:33,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:23:33,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:23:33,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:23:33,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:23:33,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:23:33,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:23:33,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:23:33,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:23:33,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:23:33,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:23:33,323 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:23:33,323 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:33,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:23:33,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:23:33,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:23:33,324 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_a1791d64-6a1a-45c2-94d4-72c190b3b944/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1cbdf83c230cb7b5e875433a1d81cdf13003742b706b294fab4c2a4e0869f21 [2021-11-23 17:23:33,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:23:33,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:23:33,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:23:33,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:23:33,828 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:23:33,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label34.c [2021-11-23 17:23:33,916 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/49a54ac1e/afc3fdc7372241ceb70534f8196d6f08/FLAG4fcb457d4 [2021-11-23 17:23:34,978 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:23:34,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/sv-benchmarks/c/eca-rers2012/Problem18_label34.c [2021-11-23 17:23:35,021 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/49a54ac1e/afc3fdc7372241ceb70534f8196d6f08/FLAG4fcb457d4 [2021-11-23 17:23:35,339 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/data/49a54ac1e/afc3fdc7372241ceb70534f8196d6f08 [2021-11-23 17:23:35,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:23:35,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:23:35,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:23:35,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:23:35,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:23:35,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:35" (1/1) ... [2021-11-23 17:23:35,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b8aeac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:35, skipping insertion in model container [2021-11-23 17:23:35,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:23:35" (1/1) ... [2021-11-23 17:23:35,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:23:35,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:23:35,753 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_a1791d64-6a1a-45c2-94d4-72c190b3b944/sv-benchmarks/c/eca-rers2012/Problem18_label34.c[1169,1182] [2021-11-23 17:23:37,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:23:37,158 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:23:37,177 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_a1791d64-6a1a-45c2-94d4-72c190b3b944/sv-benchmarks/c/eca-rers2012/Problem18_label34.c[1169,1182] [2021-11-23 17:23:37,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:23:37,827 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:23:37,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37 WrapperNode [2021-11-23 17:23:37,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:23:37,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:23:37,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:23:37,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:23:37,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:37,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,124 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4128 [2021-11-23 17:23:38,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:23:38,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:23:38,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:23:38,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:23:38,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:23:38,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:23:38,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:23:38,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:23:38,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (1/1) ... [2021-11-23 17:23:38,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:23:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:38,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:23:38,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:23:38,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:23:38,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:23:38,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:23:38,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:23:38,710 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:23:38,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:23:56,378 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:23:56,405 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:23:56,406 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:23:56,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:23:56 BoogieIcfgContainer [2021-11-23 17:23:56,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:23:56,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:23:56,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:23:56,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:23:56,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:23:35" (1/3) ... [2021-11-23 17:23:56,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343ffebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:23:56, skipping insertion in model container [2021-11-23 17:23:56,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:23:37" (2/3) ... [2021-11-23 17:23:56,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343ffebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:23:56, skipping insertion in model container [2021-11-23 17:23:56,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:23:56" (3/3) ... [2021-11-23 17:23:56,420 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label34.c [2021-11-23 17:23:56,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:23:56,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:23:56,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:23:56,503 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 17:23:56,503 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:23:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 17:23:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:23:56,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:56,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:56,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:56,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1810726993, now seen corresponding path program 1 times [2021-11-23 17:23:56,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:56,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858105664] [2021-11-23 17:23:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:56,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:56,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:56,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:23:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:56,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:56,745 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 17:23:56,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:56,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858105664] [2021-11-23 17:23:56,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858105664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:56,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:56,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:23:56,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778762933] [2021-11-23 17:23:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:56,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:56,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:56,814 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 17:24:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:17,294 INFO L93 Difference]: Finished difference Result 2221 states and 4282 transitions. [2021-11-23 17:24:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:17,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-23 17:24:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:17,337 INFO L225 Difference]: With dead ends: 2221 [2021-11-23 17:24:17,338 INFO L226 Difference]: Without dead ends: 1384 [2021-11-23 17:24:17,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 17:24:17,351 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 788 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:17,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 487 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 20.2s Time] [2021-11-23 17:24:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-23 17:24:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-11-23 17:24:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5994215473608098) internal successors, (2212), 1383 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states 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 17:24:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2212 transitions. [2021-11-23 17:24:17,551 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2212 transitions. Word has length 7 [2021-11-23 17:24:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2212 transitions. [2021-11-23 17:24:17,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 17:24:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2212 transitions. [2021-11-23 17:24:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 17:24:17,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:17,556 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:24:17,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:17,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:17,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash -481165214, now seen corresponding path program 1 times [2021-11-23 17:24:17,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:17,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044509750] [2021-11-23 17:24:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:17,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:17,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:17,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:17,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:24:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:18,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:18,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:18,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044509750] [2021-11-23 17:24:18,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044509750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:18,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:18,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:24:18,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948232394] [2021-11-23 17:24:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:18,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:18,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:18,196 INFO L87 Difference]: Start difference. First operand 1384 states and 2212 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 17:24:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:38,703 INFO L93 Difference]: Finished difference Result 3456 states and 5737 transitions. [2021-11-23 17:24:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:38,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 17:24:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:38,721 INFO L225 Difference]: With dead ends: 3456 [2021-11-23 17:24:38,721 INFO L226 Difference]: Without dead ends: 2074 [2021-11-23 17:24:38,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 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 17:24:38,726 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 714 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:38,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 20.4s Time] [2021-11-23 17:24:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-23 17:24:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2021-11-23 17:24:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.3685479980704294) internal successors, (2837), 2073 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states 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 17:24:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 2837 transitions. [2021-11-23 17:24:38,801 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 2837 transitions. Word has length 72 [2021-11-23 17:24:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:38,802 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 2837 transitions. [2021-11-23 17:24:38,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 17:24:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 2837 transitions. [2021-11-23 17:24:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:24:38,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:38,808 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:24:38,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:24:39,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:39,025 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash -827737880, now seen corresponding path program 1 times [2021-11-23 17:24:39,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:39,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758276036] [2021-11-23 17:24:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:39,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:39,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:39,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:39,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:24:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:24:39,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:40,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:40,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758276036] [2021-11-23 17:24:40,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758276036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:40,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:40,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:24:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017287658] [2021-11-23 17:24:40,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:40,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:40,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:40,117 INFO L87 Difference]: Start difference. First operand 2074 states and 2837 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 17:24:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:55,206 INFO L93 Difference]: Finished difference Result 4836 states and 6392 transitions. [2021-11-23 17:24:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-23 17:24:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:55,228 INFO L225 Difference]: With dead ends: 4836 [2021-11-23 17:24:55,228 INFO L226 Difference]: Without dead ends: 2764 [2021-11-23 17:24:55,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 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 17:24:55,233 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 600 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:55,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 629 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2021-11-23 17:24:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-11-23 17:24:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-11-23 17:24:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.2808541440463264) internal successors, (3539), 2763 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states 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 17:24:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3539 transitions. [2021-11-23 17:24:55,316 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3539 transitions. Word has length 100 [2021-11-23 17:24:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:55,317 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3539 transitions. [2021-11-23 17:24:55,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 17:24:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3539 transitions. [2021-11-23 17:24:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-23 17:24:55,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:55,327 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:55,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:55,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:55,541 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1574683760, now seen corresponding path program 1 times [2021-11-23 17:24:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:55,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35060158] [2021-11-23 17:24:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:55,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:55,549 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:55,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:24:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:24:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:58,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:58,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35060158] [2021-11-23 17:24:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35060158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:58,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:58,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:58,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944243866] [2021-11-23 17:24:58,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:58,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:24:58,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:24:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:24:58,386 INFO L87 Difference]: Start difference. First operand 2764 states and 3539 transitions. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 17:25:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:18,049 INFO L93 Difference]: Finished difference Result 4199 states and 5707 transitions. [2021-11-23 17:25:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:25:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 282 [2021-11-23 17:25:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:18,067 INFO L225 Difference]: With dead ends: 4199 [2021-11-23 17:25:18,067 INFO L226 Difference]: Without dead ends: 2074 [2021-11-23 17:25:18,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:18,072 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 515 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3365 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:18,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 640 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3365 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2021-11-23 17:25:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-23 17:25:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2021-11-23 17:25:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.3555233960443802) internal successors, (2810), 2073 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 17:25:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 2810 transitions. [2021-11-23 17:25:18,137 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 2810 transitions. Word has length 282 [2021-11-23 17:25:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:18,138 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 2810 transitions. [2021-11-23 17:25:18,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 17:25:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 2810 transitions. [2021-11-23 17:25:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-23 17:25:18,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:18,146 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:25:18,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:18,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:18,362 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1567745964, now seen corresponding path program 1 times [2021-11-23 17:25:18,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370690598] [2021-11-23 17:25:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:18,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:18,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:18,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:18,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:25:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:18,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:19,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:19,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:19,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370690598] [2021-11-23 17:25:19,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370690598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:19,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:19,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:19,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807856859] [2021-11-23 17:25:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:19,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:19,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:19,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:19,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:19,821 INFO L87 Difference]: Start difference. First operand 2074 states and 2810 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 17:25:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:41,605 INFO L93 Difference]: Finished difference Result 5526 states and 7732 transitions. [2021-11-23 17:25:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 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 306 [2021-11-23 17:25:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:41,631 INFO L225 Difference]: With dead ends: 5526 [2021-11-23 17:25:41,632 INFO L226 Difference]: Without dead ends: 4144 [2021-11-23 17:25:41,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 304 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 17:25:41,636 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 397 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:41,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 425 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 21.6s Time] [2021-11-23 17:25:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-11-23 17:25:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2021-11-23 17:25:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.2534395365677045) internal successors, (5193), 4143 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states 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 17:25:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5193 transitions. [2021-11-23 17:25:41,779 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5193 transitions. Word has length 306 [2021-11-23 17:25:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:41,779 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5193 transitions. [2021-11-23 17:25:41,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 17:25:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5193 transitions. [2021-11-23 17:25:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-11-23 17:25:41,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:41,810 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:41,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:42,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:42,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash 181641401, now seen corresponding path program 1 times [2021-11-23 17:25:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059740867] [2021-11-23 17:25:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:42,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:42,031 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:42,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:25:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:42,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:25:45,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:25:46,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:46,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059740867] [2021-11-23 17:25:46,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059740867] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:25:46,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:25:46,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:25:46,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599857614] [2021-11-23 17:25:46,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:46,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:46,983 INFO L87 Difference]: Start difference. First operand 4144 states and 5193 transitions. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 17:26:00,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:14,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:36,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:21,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:27,858 INFO L93 Difference]: Finished difference Result 9666 states and 12806 transitions. [2021-11-23 17:27:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:27,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 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 821 [2021-11-23 17:27:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:27,903 INFO L225 Difference]: With dead ends: 9666 [2021-11-23 17:27:27,904 INFO L226 Difference]: Without dead ends: 6904 [2021-11-23 17:27:27,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1640 GetRequests, 1637 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 17:27:27,910 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 805 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 931 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:27,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 123 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 2029 Invalid, 1 Unknown, 0 Unchecked, 100.7s Time] [2021-11-23 17:27:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2021-11-23 17:27:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6904. [2021-11-23 17:27:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.2746631899174272) internal successors, (8799), 6903 states have internal predecessors, (8799), 0 states have call successors, (0), 0 states 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 17:27:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8799 transitions. [2021-11-23 17:27:28,103 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8799 transitions. Word has length 821 [2021-11-23 17:27:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:28,106 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 8799 transitions. [2021-11-23 17:27:28,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 17:27:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8799 transitions. [2021-11-23 17:27:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2021-11-23 17:27:28,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:28,153 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:27:28,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:28,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:28,374 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:28,375 INFO L85 PathProgramCache]: Analyzing trace with hash 600927806, now seen corresponding path program 1 times [2021-11-23 17:27:28,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:28,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489372835] [2021-11-23 17:27:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:28,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:28,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:28,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:27:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:27:30,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:30,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:30,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489372835] [2021-11-23 17:27:30,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489372835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:30,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:30,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:30,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785553858] [2021-11-23 17:27:30,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:30,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:30,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:30,385 INFO L87 Difference]: Start difference. First operand 6904 states and 8799 transitions. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 17:27:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:54,557 INFO L93 Difference]: Finished difference Result 15186 states and 20312 transitions. [2021-11-23 17:27:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:54,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 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 893 [2021-11-23 17:27:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:54,613 INFO L225 Difference]: With dead ends: 15186 [2021-11-23 17:27:54,614 INFO L226 Difference]: Without dead ends: 9664 [2021-11-23 17:27:54,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 891 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 17:27:54,622 INFO L933 BasicCegarLoop]: 1235 mSDtfsCounter, 619 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:54,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 1242 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 24.0s Time] [2021-11-23 17:27:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-11-23 17:27:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 9664. [2021-11-23 17:27:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9664 states, 9663 states have (on average 1.2527165476560074) internal successors, (12105), 9663 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states 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 17:27:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9664 states to 9664 states and 12105 transitions. [2021-11-23 17:27:54,834 INFO L78 Accepts]: Start accepts. Automaton has 9664 states and 12105 transitions. Word has length 893 [2021-11-23 17:27:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:54,837 INFO L470 AbstractCegarLoop]: Abstraction has 9664 states and 12105 transitions. [2021-11-23 17:27:54,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 17:27:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9664 states and 12105 transitions. [2021-11-23 17:27:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2021-11-23 17:27:54,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:54,886 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:27:54,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:55,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:55,097 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:55,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1477619415, now seen corresponding path program 1 times [2021-11-23 17:27:55,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:55,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252679804] [2021-11-23 17:27:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:55,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:55,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:55,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:55,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:27:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:27:58,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:58,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252679804] [2021-11-23 17:27:58,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252679804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:58,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:58,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:58,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436281646] [2021-11-23 17:27:58,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:58,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:27:58,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:58,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:27:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:27:58,939 INFO L87 Difference]: Start difference. First operand 9664 states and 12105 transitions. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 17:28:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:28,237 INFO L93 Difference]: Finished difference Result 25536 states and 32804 transitions. [2021-11-23 17:28:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:28:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 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 921 [2021-11-23 17:28:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:28,286 INFO L225 Difference]: With dead ends: 25536 [2021-11-23 17:28:28,287 INFO L226 Difference]: Without dead ends: 17254 [2021-11-23 17:28:28,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:28:28,297 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 777 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 4362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:28,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 612 Invalid, 4362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 29.1s Time] [2021-11-23 17:28:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2021-11-23 17:28:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 17254. [2021-11-23 17:28:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17254 states, 17253 states have (on average 1.1843157711702312) internal successors, (20433), 17253 states have internal predecessors, (20433), 0 states have call successors, (0), 0 states 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 17:28:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 20433 transitions. [2021-11-23 17:28:28,658 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 20433 transitions. Word has length 921 [2021-11-23 17:28:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:28,660 INFO L470 AbstractCegarLoop]: Abstraction has 17254 states and 20433 transitions. [2021-11-23 17:28:28,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 17:28:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 20433 transitions. [2021-11-23 17:28:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2021-11-23 17:28:28,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:28,776 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:28:28,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:28,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:28,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 593369368, now seen corresponding path program 1 times [2021-11-23 17:28:28,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:28,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237141224] [2021-11-23 17:28:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:28,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:28,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:28,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:28,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:28:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:29,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:28:29,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 285 proven. 172 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-23 17:28:32,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-23 17:28:34,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:34,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237141224] [2021-11-23 17:28:34,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237141224] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:28:34,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:28:34,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:28:34,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765603140] [2021-11-23 17:28:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:34,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:28:34,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:28:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:28:34,386 INFO L87 Difference]: Start difference. First operand 17254 states and 20433 transitions. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 17:29:16,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:30,848 INFO L93 Difference]: Finished difference Result 40026 states and 47724 transitions. [2021-11-23 17:29:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:29:30,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 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 1000 [2021-11-23 17:29:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:30,895 INFO L225 Difference]: With dead ends: 40026 [2021-11-23 17:29:30,895 INFO L226 Difference]: Without dead ends: 24154 [2021-11-23 17:29:30,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1998 GetRequests, 1995 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 17:29:30,911 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 699 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:30,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 279 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 56.3s Time] [2021-11-23 17:29:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24154 states. [2021-11-23 17:29:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24154 to 24154. [2021-11-23 17:29:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24154 states, 24153 states have (on average 1.169668364178363) internal successors, (28251), 24153 states have internal predecessors, (28251), 0 states have call successors, (0), 0 states 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 17:29:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24154 states to 24154 states and 28251 transitions. [2021-11-23 17:29:31,450 INFO L78 Accepts]: Start accepts. Automaton has 24154 states and 28251 transitions. Word has length 1000 [2021-11-23 17:29:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:31,451 INFO L470 AbstractCegarLoop]: Abstraction has 24154 states and 28251 transitions. [2021-11-23 17:29:31,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 17:29:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 24154 states and 28251 transitions. [2021-11-23 17:29:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2021-11-23 17:29:31,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:31,549 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 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, 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] [2021-11-23 17:29:31,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 17:29:31,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:29:31,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:29:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:31,751 INFO L85 PathProgramCache]: Analyzing trace with hash -391209753, now seen corresponding path program 1 times [2021-11-23 17:29:31,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:31,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057472951] [2021-11-23 17:29:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:31,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:31,769 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:31,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:29:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:29:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 145 proven. 396 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:29:39,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 490 proven. 51 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:29:43,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057472951] [2021-11-23 17:29:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057472951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:43,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069463228] [2021-11-23 17:29:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:43,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:43,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:43,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:43,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:29:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:44,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:29:44,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-23 17:29:46,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:29:46,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2069463228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:29:46,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:29:46,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 13 [2021-11-23 17:29:46,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264582646] [2021-11-23 17:29:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:29:46,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:29:46,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:29:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:29:46,669 INFO L87 Difference]: Start difference. First operand 24154 states and 28251 transitions. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 17:30:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:30,422 INFO L93 Difference]: Finished difference Result 50587 states and 60028 transitions. [2021-11-23 17:30:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:30:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 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 1043 [2021-11-23 17:30:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:30,484 INFO L225 Difference]: With dead ends: 50587 [2021-11-23 17:30:30,485 INFO L226 Difference]: Without dead ends: 25534 [2021-11-23 17:30:30,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3128 GetRequests, 3116 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:30:30,506 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 2774 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 7734 mSolverCounterSat, 1409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2774 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 9143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1409 IncrementalHoareTripleChecker+Valid, 7734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:30,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2774 Valid, 875 Invalid, 9143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1409 Valid, 7734 Invalid, 0 Unknown, 0 Unchecked, 43.4s Time] [2021-11-23 17:30:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25534 states. [2021-11-23 17:30:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25534 to 25534. [2021-11-23 17:30:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25534 states, 25533 states have (on average 1.0648180785649943) internal successors, (27188), 25533 states have internal predecessors, (27188), 0 states have call successors, (0), 0 states 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 17:30:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 27188 transitions. [2021-11-23 17:30:31,095 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 27188 transitions. Word has length 1043 [2021-11-23 17:30:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:31,096 INFO L470 AbstractCegarLoop]: Abstraction has 25534 states and 27188 transitions. [2021-11-23 17:30:31,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 17:30:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 27188 transitions. [2021-11-23 17:30:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2021-11-23 17:30:31,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:31,109 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:30:31,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:31,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:31,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:31,511 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 409783849, now seen corresponding path program 1 times [2021-11-23 17:30:31,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:31,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855150228] [2021-11-23 17:30:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:31,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:31,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:31,519 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:31,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:30:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:31,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:30:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-23 17:30:33,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:30:33,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855150228] [2021-11-23 17:30:33,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855150228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:30:33,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:30:33,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:30:33,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053933259] [2021-11-23 17:30:33,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:30:33,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:30:33,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:30:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:30:33,806 INFO L87 Difference]: Start difference. First operand 25534 states and 27188 transitions. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 17:30:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:48,990 INFO L93 Difference]: Finished difference Result 57276 states and 61269 transitions. [2021-11-23 17:30:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:30:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 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 1067 [2021-11-23 17:30:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:49,050 INFO L225 Difference]: With dead ends: 57276 [2021-11-23 17:30:49,050 INFO L226 Difference]: Without dead ends: 33124 [2021-11-23 17:30:49,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1065 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 17:30:49,065 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 686 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:49,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 986 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2021-11-23 17:30:49,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2021-11-23 17:30:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 33124. [2021-11-23 17:30:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33124 states, 33123 states have (on average 1.054342903722489) internal successors, (34923), 33123 states have internal predecessors, (34923), 0 states have call successors, (0), 0 states 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 17:30:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33124 states to 33124 states and 34923 transitions. [2021-11-23 17:30:49,738 INFO L78 Accepts]: Start accepts. Automaton has 33124 states and 34923 transitions. Word has length 1067 [2021-11-23 17:30:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:49,739 INFO L470 AbstractCegarLoop]: Abstraction has 33124 states and 34923 transitions. [2021-11-23 17:30:49,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 17:30:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33124 states and 34923 transitions. [2021-11-23 17:30:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1269 [2021-11-23 17:30:49,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:49,806 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:30:49,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:50,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:30:50,021 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash -915968457, now seen corresponding path program 1 times [2021-11-23 17:30:50,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:50,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240922526] [2021-11-23 17:30:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:50,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:50,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:50,030 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:50,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:30:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:30:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 655 proven. 631 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-23 17:30:57,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 1008 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-11-23 17:31:02,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240922526] [2021-11-23 17:31:02,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240922526] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:31:02,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:31:02,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 17:31:02,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117863382] [2021-11-23 17:31:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:02,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:02,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:02,048 INFO L87 Difference]: Start difference. First operand 33124 states and 34923 transitions. Second operand has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 17:31:20,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:31,536 INFO L93 Difference]: Finished difference Result 68316 states and 71977 transitions. [2021-11-23 17:31:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:31,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 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 1268 [2021-11-23 17:31:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:31,586 INFO L225 Difference]: With dead ends: 68316 [2021-11-23 17:31:31,586 INFO L226 Difference]: Without dead ends: 36574 [2021-11-23 17:31:31,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2534 GetRequests, 2530 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:31,606 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 598 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:31,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 38 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 29.2s Time] [2021-11-23 17:31:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36574 states. [2021-11-23 17:31:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36574 to 35884. [2021-11-23 17:31:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35884 states, 35883 states have (on average 1.0477942201042276) internal successors, (37598), 35883 states have internal predecessors, (37598), 0 states have call successors, (0), 0 states 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 17:31:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35884 states to 35884 states and 37598 transitions. [2021-11-23 17:31:32,515 INFO L78 Accepts]: Start accepts. Automaton has 35884 states and 37598 transitions. Word has length 1268 [2021-11-23 17:31:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:32,517 INFO L470 AbstractCegarLoop]: Abstraction has 35884 states and 37598 transitions. [2021-11-23 17:31:32,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 17:31:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 35884 states and 37598 transitions. [2021-11-23 17:31:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1304 [2021-11-23 17:31:32,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:32,728 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:31:32,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:31:32,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:32,929 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2115221559, now seen corresponding path program 1 times [2021-11-23 17:31:32,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:32,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144526859] [2021-11-23 17:31:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:32,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:32,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:32,947 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:32,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:31:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 1147 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-11-23 17:31:35,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:35,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:35,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144526859] [2021-11-23 17:31:35,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144526859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:35,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:35,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:35,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601505494] [2021-11-23 17:31:35,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:35,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:35,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:35,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:35,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:35,616 INFO L87 Difference]: Start difference. First operand 35884 states and 37598 transitions. Second operand has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 17:31:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:52,543 INFO L93 Difference]: Finished difference Result 80046 states and 84307 transitions. [2021-11-23 17:31:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 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 1303 [2021-11-23 17:31:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:52,589 INFO L225 Difference]: With dead ends: 80046 [2021-11-23 17:31:52,589 INFO L226 Difference]: Without dead ends: 45544 [2021-11-23 17:31:52,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1301 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 17:31:52,607 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 606 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:52,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 977 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2021-11-23 17:31:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45544 states. [2021-11-23 17:31:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45544 to 45544. [2021-11-23 17:31:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45544 states, 45543 states have (on average 1.0462639703137695) internal successors, (47650), 45543 states have internal predecessors, (47650), 0 states have call successors, (0), 0 states 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 17:31:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45544 states to 45544 states and 47650 transitions. [2021-11-23 17:31:53,347 INFO L78 Accepts]: Start accepts. Automaton has 45544 states and 47650 transitions. Word has length 1303 [2021-11-23 17:31:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:53,348 INFO L470 AbstractCegarLoop]: Abstraction has 45544 states and 47650 transitions. [2021-11-23 17:31:53,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 17:31:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 45544 states and 47650 transitions. [2021-11-23 17:31:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1325 [2021-11-23 17:31:53,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:53,568 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:31:53,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:53,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:53,769 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 73299291, now seen corresponding path program 1 times [2021-11-23 17:31:53,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:53,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761454086] [2021-11-23 17:31:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:53,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:53,779 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:53,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1791d64-6a1a-45c2-94d4-72c190b3b944/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:31:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:54,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 716 proven. 865 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-23 17:31:58,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1303 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-11-23 17:32:04,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761454086] [2021-11-23 17:32:04,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761454086] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:32:04,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:32:04,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-23 17:32:04,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344479209] [2021-11-23 17:32:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:04,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:32:04,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:04,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:32:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:32:04,952 INFO L87 Difference]: Start difference. First operand 45544 states and 47650 transitions. Second operand has 4 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 17:32:28,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:33,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:40,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:47,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:54,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:55,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:57,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:01,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:03,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:05,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:14,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:21,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:29,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:32,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:41,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:02,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:18,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:20,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:34,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:36,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:47,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:49,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:55,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:00,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:06,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:08,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:23,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:26,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:28,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:34,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:42,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:44,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:48,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:51,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:52,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:54,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:06,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:14,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:18,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:21,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:23,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:26,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:31,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:33,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:38,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:39,689 INFO L93 Difference]: Finished difference Result 109716 states and 115929 transitions. [2021-11-23 17:36:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:36:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 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 1324 [2021-11-23 17:36:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:39,768 INFO L225 Difference]: With dead ends: 109716 [2021-11-23 17:36:39,768 INFO L226 Difference]: Without dead ends: 65554 [2021-11-23 17:36:39,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2646 GetRequests, 2640 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:36:39,788 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1300 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3246 mSolverCounterSat, 881 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 4134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 3246 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 274.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:39,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 45 Invalid, 4134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 3246 Invalid, 7 Unknown, 0 Unchecked, 274.2s Time] [2021-11-23 17:36:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65554 states.