./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:08:23,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:08:23,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:08:23,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:08:23,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:08:23,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:08:23,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:08:23,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:08:23,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:08:23,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:08:23,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:08:23,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:08:23,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:08:23,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:08:23,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:08:23,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:08:23,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:08:23,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:08:23,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:08:23,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:08:23,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:08:23,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:08:23,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:08:23,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:08:23,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:08:23,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:08:23,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:08:23,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:08:23,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:08:23,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:08:23,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:08:23,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:08:23,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:08:23,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:08:23,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:08:23,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:08:23,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:08:23,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:08:23,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:08:23,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:08:23,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:08:23,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:08:23,904 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:08:23,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:08:23,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:08:23,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:08:23,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:08:23,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:08:23,908 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:08:23,909 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:08:23,909 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:08:23,910 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:08:23,910 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:08:23,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:08:23,911 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:08:23,911 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:08:23,912 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:08:23,912 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:08:23,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:08:23,913 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:08:23,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:08:23,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:08:23,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:08:23,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:08:23,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:08:23,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:08:23,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:08:23,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:08:23,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:08:23,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:08:23,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:08:23,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:08:23,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:08:23,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:08:23,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:23,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:08:23,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:08:23,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:08:23,921 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:08:23,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:08:23,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:08:23,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:08:23,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:08:23,922 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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e [2021-11-23 17:08:24,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:08:24,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:08:24,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:08:24,199 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:08:24,200 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:08:24,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-23 17:08:24,294 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/de41201cb/2a0ba89c6c2542e0bb196b31249e3dbb/FLAGa0adb8b0b [2021-11-23 17:08:25,020 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:08:25,024 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-23 17:08:25,050 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/de41201cb/2a0ba89c6c2542e0bb196b31249e3dbb/FLAGa0adb8b0b [2021-11-23 17:08:25,293 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/de41201cb/2a0ba89c6c2542e0bb196b31249e3dbb [2021-11-23 17:08:25,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:08:25,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:08:25,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:25,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:08:25,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:08:25,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:25" (1/1) ... [2021-11-23 17:08:25,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446b335f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:25, skipping insertion in model container [2021-11-23 17:08:25,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:25" (1/1) ... [2021-11-23 17:08:25,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:08:25,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:08:25,895 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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-23 17:08:26,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:26,093 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:08:26,199 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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-23 17:08:26,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:26,274 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:08:26,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26 WrapperNode [2021-11-23 17:08:26,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:26,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:26,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:08:26,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:08:26,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,383 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1364 [2021-11-23 17:08:26,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:26,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:08:26,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:08:26,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:08:26,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:08:26,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:08:26,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:08:26,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:08:26,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:26" (1/1) ... [2021-11-23 17:08:26,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:26,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:08:26,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:08:26,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:08:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:08:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:08:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:08:26,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:08:26,724 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:08:26,725 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:08:27,942 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:08:28,060 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 17:08:28,065 INFO L158 Benchmark]: Toolchain (without parser) took 2760.65ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 61.2MB in the beginning and 88.9MB in the end (delta: -27.7MB). Peak memory consumption was 59.0MB. Max. memory is 16.1GB. [2021-11-23 17:08:28,065 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:08:28,066 INFO L158 Benchmark]: CACSL2BoogieTranslator took 967.03ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 61.0MB in the beginning and 82.1MB in the end (delta: -21.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 17:08:28,067 INFO L158 Benchmark]: Boogie Procedure Inliner took 106.78ms. Allocated memory is still 123.7MB. Free memory was 82.1MB in the beginning and 77.1MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 17:08:28,068 INFO L158 Benchmark]: Boogie Preprocessor took 88.33ms. Allocated memory is still 123.7MB. Free memory was 77.1MB in the beginning and 72.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:08:28,069 INFO L158 Benchmark]: RCFGBuilder took 1589.33ms. Allocated memory is still 123.7MB. Free memory was 72.9MB in the beginning and 88.9MB in the end (delta: -16.0MB). Peak memory consumption was 44.7MB. Max. memory is 16.1GB. [2021-11-23 17:08:28,073 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 96.5MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 967.03ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 61.0MB in the beginning and 82.1MB in the end (delta: -21.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 106.78ms. Allocated memory is still 123.7MB. Free memory was 82.1MB in the beginning and 77.1MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 88.33ms. Allocated memory is still 123.7MB. Free memory was 77.1MB in the beginning and 72.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1589.33ms. Allocated memory is still 123.7MB. Free memory was 72.9MB in the beginning and 88.9MB in the end (delta: -16.0MB). Peak memory consumption was 44.7MB. 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 17:08:28,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:08:30,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:08:30,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:08:30,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:08:30,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:08:30,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:08:30,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:08:30,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:08:30,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:08:30,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:08:30,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:08:30,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:08:30,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:08:30,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:08:30,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:08:30,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:08:30,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:08:30,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:08:30,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:08:30,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:08:30,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:08:30,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:08:30,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:08:30,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:08:30,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:08:30,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:08:30,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:08:30,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:08:30,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:08:30,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:08:30,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:08:30,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:08:30,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:08:30,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:08:30,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:08:30,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:08:30,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:08:30,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:08:30,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:08:30,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:08:30,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:08:30,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:08:30,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:08:30,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:08:30,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:08:30,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:08:30,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:08:30,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:08:30,913 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:08:30,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:08:30,914 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:08:30,914 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:08:30,915 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:08:30,915 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:08:30,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:08:30,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:08:30,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:08:30,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:08:30,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:08:30,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:08:30,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:08:30,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:08:30,918 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:08:30,918 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:08:30,919 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:08:30,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:08:30,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:08:30,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:08:30,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:08:30,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:08:30,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:08:30,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:30,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:08:30,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:08:30,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:08:30,921 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:08:30,921 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:08:30,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:08:30,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:08:30,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:08:30,922 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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e [2021-11-23 17:08:31,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:08:31,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:08:31,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:08:31,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:08:31,404 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:08:31,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-23 17:08:31,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/74e2da032/8dba338c69e24006854ac116b699f56d/FLAGbf43fdd21 [2021-11-23 17:08:32,285 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:08:32,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-23 17:08:32,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/74e2da032/8dba338c69e24006854ac116b699f56d/FLAGbf43fdd21 [2021-11-23 17:08:32,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/data/74e2da032/8dba338c69e24006854ac116b699f56d [2021-11-23 17:08:32,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:08:32,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:08:32,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:32,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:08:32,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:08:32,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:32,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d32db1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32, skipping insertion in model container [2021-11-23 17:08:32,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:32,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:08:32,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:08:33,174 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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-23 17:08:33,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:33,303 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:08:33,499 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_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-23 17:08:33,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:33,658 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:08:33,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33 WrapperNode [2021-11-23 17:08:33,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:33,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:33,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:08:33,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:08:33,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,802 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1340 [2021-11-23 17:08:33,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:33,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:08:33,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:08:33,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:08:33,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:08:33,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:08:33,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:08:33,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:08:33,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (1/1) ... [2021-11-23 17:08:33,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:33,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:08:33,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:08:33,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:08:34,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:08:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:08:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:08:34,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:08:34,251 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:08:34,253 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:08:35,619 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:08:35,643 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:08:35,645 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:08:35,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:08:35 BoogieIcfgContainer [2021-11-23 17:08:35,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:08:35,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:08:35,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:08:35,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:08:35,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:08:32" (1/3) ... [2021-11-23 17:08:35,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:08:35, skipping insertion in model container [2021-11-23 17:08:35,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:33" (2/3) ... [2021-11-23 17:08:35,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:08:35, skipping insertion in model container [2021-11-23 17:08:35,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:08:35" (3/3) ... [2021-11-23 17:08:35,663 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-23 17:08:35,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:08:35,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:08:35,748 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:08:35,756 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 17:08:35,756 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:08:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 342 states, 340 states have (on average 1.7970588235294118) internal successors, (611), 341 states have internal predecessors, (611), 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 17:08:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:08:35,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:35,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:35,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:35,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1594884720, now seen corresponding path program 1 times [2021-11-23 17:08:35,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:35,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400479169] [2021-11-23 17:08:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:35,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:35,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:35,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:35,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:08:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:08:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:36,750 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 17:08:36,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:36,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400479169] [2021-11-23 17:08:36,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400479169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:36,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:36,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:08:36,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885279855] [2021-11-23 17:08:36,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:36,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:36,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:08:36,820 INFO L87 Difference]: Start difference. First operand has 342 states, 340 states have (on average 1.7970588235294118) internal successors, (611), 341 states have internal predecessors, (611), 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 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 17:08:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:37,025 INFO L93 Difference]: Finished difference Result 628 states and 1091 transitions. [2021-11-23 17:08:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 118 [2021-11-23 17:08:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:37,063 INFO L225 Difference]: With dead ends: 628 [2021-11-23 17:08:37,064 INFO L226 Difference]: Without dead ends: 473 [2021-11-23 17:08:37,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 17:08:37,080 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 256 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:37,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1132 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:08:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-23 17:08:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2021-11-23 17:08:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.6574468085106382) internal successors, (779), 470 states have internal predecessors, (779), 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 17:08:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 779 transitions. [2021-11-23 17:08:37,190 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 779 transitions. Word has length 118 [2021-11-23 17:08:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:37,192 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 779 transitions. [2021-11-23 17:08:37,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 17:08:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 779 transitions. [2021-11-23 17:08:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 17:08:37,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:37,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:37,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:37,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:37,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash -910979864, now seen corresponding path program 1 times [2021-11-23 17:08:37,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:37,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652441522] [2021-11-23 17:08:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:37,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:37,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:37,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:37,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:08:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:37,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:08:37,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:37,999 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 17:08:37,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:37,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652441522] [2021-11-23 17:08:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652441522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:38,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:38,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:08:38,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758817771] [2021-11-23 17:08:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:38,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:08:38,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:08:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:08:38,013 INFO L87 Difference]: Start difference. First operand 471 states and 779 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 17:08:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:38,162 INFO L93 Difference]: Finished difference Result 1381 states and 2282 transitions. [2021-11-23 17:08:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:08:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 121 [2021-11-23 17:08:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:38,178 INFO L225 Difference]: With dead ends: 1381 [2021-11-23 17:08:38,179 INFO L226 Difference]: Without dead ends: 921 [2021-11-23 17:08:38,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 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 17:08:38,187 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 1527 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:38,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 1068 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:08:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-23 17:08:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2021-11-23 17:08:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.6459694989106755) internal successors, (1511), 918 states have internal predecessors, (1511), 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 17:08:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1511 transitions. [2021-11-23 17:08:38,296 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1511 transitions. Word has length 121 [2021-11-23 17:08:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:38,297 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1511 transitions. [2021-11-23 17:08:38,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 17:08:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1511 transitions. [2021-11-23 17:08:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 17:08:38,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:38,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:38,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:08:38,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:38,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1066201339, now seen corresponding path program 1 times [2021-11-23 17:08:38,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:38,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145780543] [2021-11-23 17:08:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:38,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:38,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:38,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:38,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:08:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:08:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:38,936 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 17:08:38,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:38,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145780543] [2021-11-23 17:08:38,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145780543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:38,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:38,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:08:38,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994922006] [2021-11-23 17:08:38,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:38,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:38,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:08:38,948 INFO L87 Difference]: Start difference. First operand 919 states and 1511 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 17:08:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:39,049 INFO L93 Difference]: Finished difference Result 1436 states and 2386 transitions. [2021-11-23 17:08:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 122 [2021-11-23 17:08:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:39,064 INFO L225 Difference]: With dead ends: 1436 [2021-11-23 17:08:39,064 INFO L226 Difference]: Without dead ends: 1152 [2021-11-23 17:08:39,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 120 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 17:08:39,068 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 226 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:39,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1257 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:08:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-23 17:08:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1150. [2021-11-23 17:08:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.6536118363794603) internal successors, (1900), 1149 states have internal predecessors, (1900), 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 17:08:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1900 transitions. [2021-11-23 17:08:39,139 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1900 transitions. Word has length 122 [2021-11-23 17:08:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:39,141 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1900 transitions. [2021-11-23 17:08:39,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 17:08:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1900 transitions. [2021-11-23 17:08:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 17:08:39,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:39,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:39,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:39,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:39,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1577215873, now seen corresponding path program 1 times [2021-11-23 17:08:39,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:39,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325389253] [2021-11-23 17:08:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:39,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:39,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:39,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:08:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:08:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:39,832 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 17:08:39,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:39,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:39,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325389253] [2021-11-23 17:08:39,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325389253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:39,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:39,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:08:39,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190666119] [2021-11-23 17:08:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:39,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:39,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:08:39,835 INFO L87 Difference]: Start difference. First operand 1150 states and 1900 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 17:08:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:39,953 INFO L93 Difference]: Finished difference Result 2177 states and 3633 transitions. [2021-11-23 17:08:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 122 [2021-11-23 17:08:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:39,964 INFO L225 Difference]: With dead ends: 2177 [2021-11-23 17:08:39,965 INFO L226 Difference]: Without dead ends: 1408 [2021-11-23 17:08:39,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 120 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 17:08:39,968 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 234 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:39,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1094 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:08:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-11-23 17:08:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1392. [2021-11-23 17:08:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 1.6563623292595255) internal successors, (2304), 1391 states have internal predecessors, (2304), 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 17:08:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2304 transitions. [2021-11-23 17:08:40,048 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2304 transitions. Word has length 122 [2021-11-23 17:08:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:40,048 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 2304 transitions. [2021-11-23 17:08:40,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 17:08:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2304 transitions. [2021-11-23 17:08:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 17:08:40,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:40,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:40,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:40,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:40,265 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:40,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1354329819, now seen corresponding path program 1 times [2021-11-23 17:08:40,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:40,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343449018] [2021-11-23 17:08:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:40,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:40,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:40,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:08:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:08:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:40,650 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 17:08:40,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:40,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:40,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343449018] [2021-11-23 17:08:40,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343449018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:40,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:40,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:08:40,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362404515] [2021-11-23 17:08:40,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:40,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:40,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:08:40,653 INFO L87 Difference]: Start difference. First operand 1392 states and 2304 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 17:08:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:40,823 INFO L93 Difference]: Finished difference Result 4139 states and 6849 transitions. [2021-11-23 17:08:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 123 [2021-11-23 17:08:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:40,842 INFO L225 Difference]: With dead ends: 4139 [2021-11-23 17:08:40,842 INFO L226 Difference]: Without dead ends: 2768 [2021-11-23 17:08:40,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 17:08:40,846 INFO L933 BasicCegarLoop]: 1094 mSDtfsCounter, 544 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:40,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1639 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:08:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-11-23 17:08:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1405. [2021-11-23 17:08:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.6545584045584045) internal successors, (2323), 1404 states have internal predecessors, (2323), 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 17:08:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2323 transitions. [2021-11-23 17:08:40,989 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2323 transitions. Word has length 123 [2021-11-23 17:08:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:40,990 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2323 transitions. [2021-11-23 17:08:40,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 17:08:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2323 transitions. [2021-11-23 17:08:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 17:08:40,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:40,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:41,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:41,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:41,206 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1382217408, now seen corresponding path program 1 times [2021-11-23 17:08:41,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:41,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062099589] [2021-11-23 17:08:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:41,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:41,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:41,210 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:41,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:08:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:08:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:41,771 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 17:08:41,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:41,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062099589] [2021-11-23 17:08:41,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062099589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:41,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:41,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:08:41,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120564972] [2021-11-23 17:08:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:41,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:08:41,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:41,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:08:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:08:41,775 INFO L87 Difference]: Start difference. First operand 1405 states and 2323 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 17:08:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:42,093 INFO L93 Difference]: Finished difference Result 4116 states and 6808 transitions. [2021-11-23 17:08:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:08:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 123 [2021-11-23 17:08:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:42,115 INFO L225 Difference]: With dead ends: 4116 [2021-11-23 17:08:42,116 INFO L226 Difference]: Without dead ends: 2738 [2021-11-23 17:08:42,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 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 17:08:42,119 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 1289 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:42,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1289 Valid, 1294 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:08:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2021-11-23 17:08:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2736. [2021-11-23 17:08:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 1.646435100548446) internal successors, (4503), 2735 states have internal predecessors, (4503), 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 17:08:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4503 transitions. [2021-11-23 17:08:42,371 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4503 transitions. Word has length 123 [2021-11-23 17:08:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:42,372 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4503 transitions. [2021-11-23 17:08:42,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 17:08:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4503 transitions. [2021-11-23 17:08:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 17:08:42,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:42,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:42,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:42,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:42,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:42,591 INFO L85 PathProgramCache]: Analyzing trace with hash -114028367, now seen corresponding path program 1 times [2021-11-23 17:08:42,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:42,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691462869] [2021-11-23 17:08:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:42,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:42,594 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:42,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:08:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:42,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:08:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:42,947 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 17:08:42,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:42,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:42,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691462869] [2021-11-23 17:08:42,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691462869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:42,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:42,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:08:42,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679648206] [2021-11-23 17:08:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:42,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:42,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:08:42,953 INFO L87 Difference]: Start difference. First operand 2736 states and 4503 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 17:08:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:43,358 INFO L93 Difference]: Finished difference Result 8137 states and 13394 transitions. [2021-11-23 17:08:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 125 [2021-11-23 17:08:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:43,396 INFO L225 Difference]: With dead ends: 8137 [2021-11-23 17:08:43,396 INFO L226 Difference]: Without dead ends: 5444 [2021-11-23 17:08:43,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 17:08:43,402 INFO L933 BasicCegarLoop]: 1093 mSDtfsCounter, 538 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:43,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1638 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:08:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2021-11-23 17:08:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 2750. [2021-11-23 17:08:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.643870498363041) internal successors, (4519), 2749 states have internal predecessors, (4519), 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 17:08:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 4519 transitions. [2021-11-23 17:08:43,709 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 4519 transitions. Word has length 125 [2021-11-23 17:08:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:43,711 INFO L470 AbstractCegarLoop]: Abstraction has 2750 states and 4519 transitions. [2021-11-23 17:08:43,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 17:08:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 4519 transitions. [2021-11-23 17:08:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 17:08:43,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:43,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:43,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:08:43,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:43,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1304134372, now seen corresponding path program 1 times [2021-11-23 17:08:43,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:43,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346979473] [2021-11-23 17:08:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:43,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:43,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:43,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:43,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:08:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:08:44,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:45,002 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 17:08:45,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:45,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346979473] [2021-11-23 17:08:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346979473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:45,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:08:45,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022084395] [2021-11-23 17:08:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:08:45,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:08:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:08:45,005 INFO L87 Difference]: Start difference. First operand 2750 states and 4519 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 17:08:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:45,676 INFO L93 Difference]: Finished difference Result 5533 states and 9177 transitions. [2021-11-23 17:08:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:08:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2021-11-23 17:08:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:45,707 INFO L225 Difference]: With dead ends: 5533 [2021-11-23 17:08:45,707 INFO L226 Difference]: Without dead ends: 4522 [2021-11-23 17:08:45,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:08:45,711 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 500 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:45,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 1795 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 193 Unchecked, 0.1s Time] [2021-11-23 17:08:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2021-11-23 17:08:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 4513. [2021-11-23 17:08:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 1.6578014184397163) internal successors, (7480), 4512 states have internal predecessors, (7480), 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 17:08:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 7480 transitions. [2021-11-23 17:08:46,223 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 7480 transitions. Word has length 127 [2021-11-23 17:08:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:46,223 INFO L470 AbstractCegarLoop]: Abstraction has 4513 states and 7480 transitions. [2021-11-23 17:08:46,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 17:08:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 7480 transitions. [2021-11-23 17:08:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 17:08:46,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:46,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:46,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:46,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:46,451 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1858436129, now seen corresponding path program 1 times [2021-11-23 17:08:46,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:46,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202724625] [2021-11-23 17:08:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:46,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:46,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:46,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:08:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:08:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:46,969 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 17:08:46,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:46,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202724625] [2021-11-23 17:08:46,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202724625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:46,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:46,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:08:46,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990230374] [2021-11-23 17:08:46,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:08:46,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:08:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:08:46,973 INFO L87 Difference]: Start difference. First operand 4513 states and 7480 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 17:08:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:48,085 INFO L93 Difference]: Finished difference Result 12776 states and 21175 transitions. [2021-11-23 17:08:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:08:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2021-11-23 17:08:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:48,155 INFO L225 Difference]: With dead ends: 12776 [2021-11-23 17:08:48,156 INFO L226 Difference]: Without dead ends: 8304 [2021-11-23 17:08:48,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 124 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 17:08:48,167 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 1280 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:48,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1289 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:08:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8304 states. [2021-11-23 17:08:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8304 to 8302. [2021-11-23 17:08:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 8301 states have (on average 1.6484760872184074) internal successors, (13684), 8301 states have internal predecessors, (13684), 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 17:08:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 13684 transitions. [2021-11-23 17:08:49,205 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 13684 transitions. Word has length 127 [2021-11-23 17:08:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:49,205 INFO L470 AbstractCegarLoop]: Abstraction has 8302 states and 13684 transitions. [2021-11-23 17:08:49,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 17:08:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 13684 transitions. [2021-11-23 17:08:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 17:08:49,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:49,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:49,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:49,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:49,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1537603370, now seen corresponding path program 1 times [2021-11-23 17:08:49,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:49,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501435338] [2021-11-23 17:08:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:49,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:49,439 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:49,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:08:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:08:49,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:49,880 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 17:08:49,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:49,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501435338] [2021-11-23 17:08:49,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501435338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:49,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:49,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:08:49,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600974122] [2021-11-23 17:08:49,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:49,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:08:49,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:49,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:08:49,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:08:49,883 INFO L87 Difference]: Start difference. First operand 8302 states and 13684 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 17:08:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:51,705 INFO L93 Difference]: Finished difference Result 28537 states and 46854 transitions. [2021-11-23 17:08:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:08:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2021-11-23 17:08:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:51,772 INFO L225 Difference]: With dead ends: 28537 [2021-11-23 17:08:51,772 INFO L226 Difference]: Without dead ends: 20779 [2021-11-23 17:08:51,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 124 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 17:08:51,789 INFO L933 BasicCegarLoop]: 1261 mSDtfsCounter, 1270 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:51,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1270 Valid, 2758 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:08:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20779 states. [2021-11-23 17:08:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20779 to 8763. [2021-11-23 17:08:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8763 states, 8762 states have (on average 1.6501940196302214) internal successors, (14459), 8762 states have internal predecessors, (14459), 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 17:08:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 14459 transitions. [2021-11-23 17:08:52,911 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 14459 transitions. Word has length 127 [2021-11-23 17:08:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:52,912 INFO L470 AbstractCegarLoop]: Abstraction has 8763 states and 14459 transitions. [2021-11-23 17:08:52,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 17:08:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 14459 transitions. [2021-11-23 17:08:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 17:08:52,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:52,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:52,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:53,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:53,143 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:53,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1296623299, now seen corresponding path program 1 times [2021-11-23 17:08:53,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:53,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404445846] [2021-11-23 17:08:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:53,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:53,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:53,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:53,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:08:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:08:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:53,597 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 17:08:53,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:53,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:53,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404445846] [2021-11-23 17:08:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404445846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:53,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:53,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:08:53,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709611802] [2021-11-23 17:08:53,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:53,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:53,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:08:53,601 INFO L87 Difference]: Start difference. First operand 8763 states and 14459 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 17:08:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:54,583 INFO L93 Difference]: Finished difference Result 21464 states and 35640 transitions. [2021-11-23 17:08:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:54,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 129 [2021-11-23 17:08:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:54,630 INFO L225 Difference]: With dead ends: 21464 [2021-11-23 17:08:54,631 INFO L226 Difference]: Without dead ends: 14634 [2021-11-23 17:08:54,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 17:08:54,644 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 214 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:54,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1087 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:08:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14634 states. [2021-11-23 17:08:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14634 to 14632. [2021-11-23 17:08:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14632 states, 14631 states have (on average 1.6535438452600641) internal successors, (24193), 14631 states have internal predecessors, (24193), 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 17:08:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14632 states to 14632 states and 24193 transitions. [2021-11-23 17:08:55,908 INFO L78 Accepts]: Start accepts. Automaton has 14632 states and 24193 transitions. Word has length 129 [2021-11-23 17:08:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:55,908 INFO L470 AbstractCegarLoop]: Abstraction has 14632 states and 24193 transitions. [2021-11-23 17:08:55,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 17:08:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14632 states and 24193 transitions. [2021-11-23 17:08:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 17:08:55,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:55,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:55,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:56,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:56,132 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:56,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash 138081018, now seen corresponding path program 1 times [2021-11-23 17:08:56,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:56,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578403140] [2021-11-23 17:08:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:56,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:56,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:56,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:08:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:08:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:56,623 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 17:08:56,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:56,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:56,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578403140] [2021-11-23 17:08:56,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578403140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:56,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:56,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:08:56,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194530701] [2021-11-23 17:08:56,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:56,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:08:56,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:08:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:08:56,627 INFO L87 Difference]: Start difference. First operand 14632 states and 24193 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 17:08:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:58,555 INFO L93 Difference]: Finished difference Result 42858 states and 70895 transitions. [2021-11-23 17:08:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:08:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 132 [2021-11-23 17:08:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:58,654 INFO L225 Difference]: With dead ends: 42858 [2021-11-23 17:08:58,654 INFO L226 Difference]: Without dead ends: 28461 [2021-11-23 17:08:58,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 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 17:08:58,686 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 1424 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:58,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1424 Valid, 1090 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:08:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28461 states. [2021-11-23 17:09:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28461 to 28459. [2021-11-23 17:09:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28459 states, 28458 states have (on average 1.6468479865064305) internal successors, (46866), 28458 states have internal predecessors, (46866), 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 17:09:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28459 states to 28459 states and 46866 transitions. [2021-11-23 17:09:01,186 INFO L78 Accepts]: Start accepts. Automaton has 28459 states and 46866 transitions. Word has length 132 [2021-11-23 17:09:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:01,186 INFO L470 AbstractCegarLoop]: Abstraction has 28459 states and 46866 transitions. [2021-11-23 17:09:01,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 17:09:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28459 states and 46866 transitions. [2021-11-23 17:09:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 17:09:01,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:01,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:09:01,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 17:09:01,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:09:01,427 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:01,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash 761946124, now seen corresponding path program 1 times [2021-11-23 17:09:01,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:01,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542327119] [2021-11-23 17:09:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:01,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:01,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:01,429 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:01,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:09:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:01,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:09:01,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:01,823 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 17:09:01,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:09:01,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542327119] [2021-11-23 17:09:01,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542327119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:09:01,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:09:01,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:09:01,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068210175] [2021-11-23 17:09:01,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:01,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:09:01,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:09:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:09:01,826 INFO L87 Difference]: Start difference. First operand 28459 states and 46866 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 17:09:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:09:04,849 INFO L93 Difference]: Finished difference Result 64718 states and 107291 transitions. [2021-11-23 17:09:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:09:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 133 [2021-11-23 17:09:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:09:04,946 INFO L225 Difference]: With dead ends: 64718 [2021-11-23 17:09:04,947 INFO L226 Difference]: Without dead ends: 39890 [2021-11-23 17:09:04,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 17:09:04,989 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 223 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:09:04,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1234 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:09:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39890 states. [2021-11-23 17:09:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39890 to 39272. [2021-11-23 17:09:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39272 states, 39271 states have (on average 1.6422041710167807) internal successors, (64491), 39271 states have internal predecessors, (64491), 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 17:09:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39272 states to 39272 states and 64491 transitions. [2021-11-23 17:09:08,217 INFO L78 Accepts]: Start accepts. Automaton has 39272 states and 64491 transitions. Word has length 133 [2021-11-23 17:09:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:08,218 INFO L470 AbstractCegarLoop]: Abstraction has 39272 states and 64491 transitions. [2021-11-23 17:09:08,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 17:09:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 39272 states and 64491 transitions. [2021-11-23 17:09:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 17:09:08,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:08,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:09:08,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:08,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:09:08,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:08,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:08,460 INFO L85 PathProgramCache]: Analyzing trace with hash 307435578, now seen corresponding path program 1 times [2021-11-23 17:09:08,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:08,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834033030] [2021-11-23 17:09:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:08,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:08,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:08,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:08,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:09:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:09:08,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:08,924 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 17:09:08,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:09:08,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:08,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834033030] [2021-11-23 17:09:08,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834033030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:09:08,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:09:08,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:09:08,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650705035] [2021-11-23 17:09:08,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:08,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:09:08,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:08,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:09:08,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:09:08,928 INFO L87 Difference]: Start difference. First operand 39272 states and 64491 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 17:09:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:09:16,453 INFO L93 Difference]: Finished difference Result 136297 states and 223254 transitions. [2021-11-23 17:09:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:09:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2021-11-23 17:09:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:09:16,701 INFO L225 Difference]: With dead ends: 136297 [2021-11-23 17:09:16,702 INFO L226 Difference]: Without dead ends: 98720 [2021-11-23 17:09:16,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 130 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 17:09:16,762 INFO L933 BasicCegarLoop]: 1315 mSDtfsCounter, 1191 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:09:16,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 2814 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:09:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98720 states. [2021-11-23 17:09:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98720 to 40420. [2021-11-23 17:09:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40420 states, 40419 states have (on average 1.6417526410846384) internal successors, (66358), 40419 states have internal predecessors, (66358), 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 17:09:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40420 states to 40420 states and 66358 transitions. [2021-11-23 17:09:20,869 INFO L78 Accepts]: Start accepts. Automaton has 40420 states and 66358 transitions. Word has length 133 [2021-11-23 17:09:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 40420 states and 66358 transitions. [2021-11-23 17:09:20,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 17:09:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 40420 states and 66358 transitions. [2021-11-23 17:09:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 17:09:20,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:20,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:09:20,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:21,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:09:21,103 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash -667706855, now seen corresponding path program 1 times [2021-11-23 17:09:21,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:21,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361035883] [2021-11-23 17:09:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:21,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:21,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:21,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:21,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5d08805-3f3b-4ac9-ab3f-99865b3f4d41/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:09:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:09:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:21,529 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 17:09:21,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:09:21,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361035883] [2021-11-23 17:09:21,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361035883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:09:21,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:09:21,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:09:21,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219688017] [2021-11-23 17:09:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:21,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:09:21,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:09:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:09:21,533 INFO L87 Difference]: Start difference. First operand 40420 states and 66358 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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)