./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label08.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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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 b1b9d76937d81be7e84b48dddf4b490b52b3e309033b5807eced0086597e1f6f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:38:24,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:38:24,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:38:24,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:38:24,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:38:24,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:38:24,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:38:24,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:38:24,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:38:24,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:38:24,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:38:24,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:38:24,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:38:24,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:38:24,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:38:24,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:38:24,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:38:24,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:38:24,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:38:24,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:38:24,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:38:24,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:38:24,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:38:24,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:38:24,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:38:24,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:38:24,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:38:24,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:38:24,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:38:24,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:38:24,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:38:24,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:38:24,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:38:24,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:38:24,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:38:24,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:38:24,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:38:24,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:38:24,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:38:24,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:38:24,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:38:24,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:38:24,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:38:24,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:38:24,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:38:24,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:38:24,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:38:24,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:38:24,920 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:38:24,920 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:38:24,920 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:38:24,920 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:38:24,920 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:38:24,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:38:24,921 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:38:24,921 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:38:24,921 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:38:24,921 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:38:24,922 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:38:24,922 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:38:24,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:38:24,923 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:38:24,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:38:24,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:38:24,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:38:24,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:38:24,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:38:24,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:38:24,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:38:24,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:38:24,925 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:38:24,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:38:24,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:38:24,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:38:24,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:24,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:38:24,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:38:24,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:38:24,926 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:38:24,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:38:24,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:38:24,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:38:24,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:38:24,927 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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b9d76937d81be7e84b48dddf4b490b52b3e309033b5807eced0086597e1f6f [2021-11-23 17:38:25,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:38:25,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:38:25,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:38:25,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:38:25,240 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:38:25,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem16_label08.c [2021-11-23 17:38:25,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/36badb086/c6126e7bd76e4abc91d0b0fd0e09e508/FLAGd90fb4eb8 [2021-11-23 17:38:26,060 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:38:26,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/sv-benchmarks/c/eca-rers2012/Problem16_label08.c [2021-11-23 17:38:26,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/36badb086/c6126e7bd76e4abc91d0b0fd0e09e508/FLAGd90fb4eb8 [2021-11-23 17:38:26,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/36badb086/c6126e7bd76e4abc91d0b0fd0e09e508 [2021-11-23 17:38:26,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:38:26,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:38:26,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:26,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:38:26,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:38:26,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:26" (1/1) ... [2021-11-23 17:38:26,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435158ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:26, skipping insertion in model container [2021-11-23 17:38:26,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:26" (1/1) ... [2021-11-23 17:38:26,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:38:26,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:38:26,593 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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/sv-benchmarks/c/eca-rers2012/Problem16_label08.c[2006,2019] [2021-11-23 17:38:27,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:27,152 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:38:27,182 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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/sv-benchmarks/c/eca-rers2012/Problem16_label08.c[2006,2019] [2021-11-23 17:38:27,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:27,434 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:38:27,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27 WrapperNode [2021-11-23 17:38:27,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:27,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:27,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:38:27,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:38:27,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,651 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-11-23 17:38:27,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:27,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:38:27,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:38:27,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:38:27,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:38:27,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:38:27,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:38:27,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:38:27,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:27" (1/1) ... [2021-11-23 17:38:27,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:27,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:27,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:38:27,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:38:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:38:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:38:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:38:27,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:38:28,000 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:38:28,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:38:30,298 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:38:30,348 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 17:38:30,361 INFO L158 Benchmark]: Toolchain (without parser) took 4156.54ms. Allocated memory was 96.5MB in the beginning and 201.3MB in the end (delta: 104.9MB). Free memory was 55.5MB in the beginning and 100.0MB in the end (delta: -44.5MB). Peak memory consumption was 63.6MB. Max. memory is 16.1GB. [2021-11-23 17:38:30,362 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory is still 76.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:38:30,364 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1229.72ms. Allocated memory is still 96.5MB. Free memory was 55.3MB in the beginning and 46.5MB in the end (delta: 8.8MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2021-11-23 17:38:30,365 INFO L158 Benchmark]: Boogie Procedure Inliner took 216.27ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 46.5MB in the beginning and 77.8MB in the end (delta: -31.3MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2021-11-23 17:38:30,366 INFO L158 Benchmark]: Boogie Preprocessor took 170.48ms. Allocated memory is still 125.8MB. Free memory was 77.8MB in the beginning and 64.6MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:38:30,367 INFO L158 Benchmark]: RCFGBuilder took 2534.12ms. Allocated memory was 125.8MB in the beginning and 201.3MB in the end (delta: 75.5MB). Free memory was 64.6MB in the beginning and 100.0MB in the end (delta: -35.4MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. [2021-11-23 17:38:30,376 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory is still 76.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1229.72ms. Allocated memory is still 96.5MB. Free memory was 55.3MB in the beginning and 46.5MB in the end (delta: 8.8MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 216.27ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 46.5MB in the beginning and 77.8MB in the end (delta: -31.3MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 170.48ms. Allocated memory is still 125.8MB. Free memory was 77.8MB in the beginning and 64.6MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 2534.12ms. Allocated memory was 125.8MB in the beginning and 201.3MB in the end (delta: 75.5MB). Free memory was 64.6MB in the beginning and 100.0MB in the end (delta: -35.4MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:38:30,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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 b1b9d76937d81be7e84b48dddf4b490b52b3e309033b5807eced0086597e1f6f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:38:32,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:38:32,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:38:33,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:38:33,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:38:33,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:38:33,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:38:33,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:38:33,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:38:33,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:38:33,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:38:33,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:38:33,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:38:33,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:38:33,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:38:33,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:38:33,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:38:33,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:38:33,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:38:33,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:38:33,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:38:33,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:38:33,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:38:33,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:38:33,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:38:33,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:38:33,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:38:33,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:38:33,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:38:33,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:38:33,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:38:33,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:38:33,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:38:33,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:38:33,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:38:33,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:38:33,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:38:33,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:38:33,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:38:33,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:38:33,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:38:33,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:38:33,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:38:33,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:38:33,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:38:33,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:38:33,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:38:33,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:38:33,185 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:38:33,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:38:33,186 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:38:33,186 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:38:33,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:38:33,188 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:38:33,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:38:33,190 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:38:33,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:38:33,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:38:33,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:38:33,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:38:33,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:38:33,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:38:33,192 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:38:33,192 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:38:33,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:38:33,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:38:33,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:38:33,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:38:33,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:38:33,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:38:33,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:38:33,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:33,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:38:33,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:38:33,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:38:33,195 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:38:33,196 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:33,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:38:33,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:38:33,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:38:33,197 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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b9d76937d81be7e84b48dddf4b490b52b3e309033b5807eced0086597e1f6f [2021-11-23 17:38:33,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:38:33,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:38:33,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:38:33,629 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:38:33,630 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:38:33,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem16_label08.c [2021-11-23 17:38:33,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/d48cfe414/67c021f3b6894c0d8e2759ee4d00d1aa/FLAG1844ab0d6 [2021-11-23 17:38:34,546 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:38:34,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/sv-benchmarks/c/eca-rers2012/Problem16_label08.c [2021-11-23 17:38:34,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/d48cfe414/67c021f3b6894c0d8e2759ee4d00d1aa/FLAG1844ab0d6 [2021-11-23 17:38:34,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/data/d48cfe414/67c021f3b6894c0d8e2759ee4d00d1aa [2021-11-23 17:38:34,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:38:34,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:38:34,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:34,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:38:34,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:38:34,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:34" (1/1) ... [2021-11-23 17:38:34,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cbba491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:34, skipping insertion in model container [2021-11-23 17:38:34,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:34" (1/1) ... [2021-11-23 17:38:34,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:38:34,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:38:34,908 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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/sv-benchmarks/c/eca-rers2012/Problem16_label08.c[2006,2019] [2021-11-23 17:38:35,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:35,535 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:38:35,559 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_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/sv-benchmarks/c/eca-rers2012/Problem16_label08.c[2006,2019] [2021-11-23 17:38:35,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:35,860 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:38:35,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35 WrapperNode [2021-11-23 17:38:35,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:35,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:35,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:38:35,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:38:35,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:35,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,037 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1765 [2021-11-23 17:38:36,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:36,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:38:36,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:38:36,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:38:36,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:38:36,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:38:36,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:38:36,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:38:36,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (1/1) ... [2021-11-23 17:38:36,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:36,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:38:36,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:38:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:38:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:38:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:38:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:38:36,363 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:38:36,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:38:44,827 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:38:44,840 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:38:44,840 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:38:44,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:38:44 BoogieIcfgContainer [2021-11-23 17:38:44,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:38:44,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:38:44,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:38:44,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:38:44,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:38:34" (1/3) ... [2021-11-23 17:38:44,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e57f3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:38:44, skipping insertion in model container [2021-11-23 17:38:44,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:35" (2/3) ... [2021-11-23 17:38:44,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e57f3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:38:44, skipping insertion in model container [2021-11-23 17:38:44,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:38:44" (3/3) ... [2021-11-23 17:38:44,853 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label08.c [2021-11-23 17:38:44,859 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:38:44,859 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:38:44,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:38:44,949 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 17:38:44,949 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:38:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 17:38:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 17:38:44,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:44,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:44,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2021-11-23 17:38:45,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:45,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207738119] [2021-11-23 17:38:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:45,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:45,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:45,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:38:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:38:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:45,248 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 17:38:45,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:38:45,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:45,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207738119] [2021-11-23 17:38:45,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207738119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:38:45,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:38:45,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:38:45,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415461134] [2021-11-23 17:38:45,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:38:45,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:38:45,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:38:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:38:45,342 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17:38:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:56,219 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-11-23 17:38:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:38:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-23 17:38:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:56,241 INFO L225 Difference]: With dead ends: 1122 [2021-11-23 17:38:56,242 INFO L226 Difference]: Without dead ends: 662 [2021-11-23 17:38:56,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 17:38:56,251 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 328 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:56,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 290 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-23 17:38:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-23 17:38:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-11-23 17:38:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.4826021180030258) internal successors, (980), 661 states have internal predecessors, (980), 0 states have call successors, (0), 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 17:38:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 980 transitions. [2021-11-23 17:38:56,341 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 980 transitions. Word has length 17 [2021-11-23 17:38:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:56,341 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 980 transitions. [2021-11-23 17:38:56,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17:38:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 980 transitions. [2021-11-23 17:38:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 17:38:56,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:56,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:56,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:56,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:56,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1951878136, now seen corresponding path program 1 times [2021-11-23 17:38:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:56,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96945470] [2021-11-23 17:38:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:56,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:56,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:56,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:38:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:38:56,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:57,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:38:57,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:57,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96945470] [2021-11-23 17:38:57,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96945470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:38:57,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:38:57,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:38:57,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329486412] [2021-11-23 17:38:57,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:38:57,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:38:57,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:38:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:38:57,085 INFO L87 Difference]: Start difference. First operand 662 states and 980 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 17:39:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:04,496 INFO L93 Difference]: Finished difference Result 1651 states and 2341 transitions. [2021-11-23 17:39:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-23 17:39:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:04,504 INFO L225 Difference]: With dead ends: 1651 [2021-11-23 17:39:04,504 INFO L226 Difference]: Without dead ends: 991 [2021-11-23 17:39:04,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 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 17:39:04,510 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 260 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:04,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 249 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 17:39:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-23 17:39:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2021-11-23 17:39:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.3525252525252525) internal successors, (1339), 990 states have internal predecessors, (1339), 0 states have call successors, (0), 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 17:39:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1339 transitions. [2021-11-23 17:39:04,558 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1339 transitions. Word has length 89 [2021-11-23 17:39:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:04,559 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1339 transitions. [2021-11-23 17:39:04,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 17:39:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1339 transitions. [2021-11-23 17:39:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:39:04,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:04,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:04,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:04,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:04,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:04,773 INFO L85 PathProgramCache]: Analyzing trace with hash -706390549, now seen corresponding path program 1 times [2021-11-23 17:39:04,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:04,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217432194] [2021-11-23 17:39:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:04,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:04,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:04,787 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:04,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:39:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:04,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:39:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:05,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:05,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217432194] [2021-11-23 17:39:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217432194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:05,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:05,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:05,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634022465] [2021-11-23 17:39:05,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:05,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:05,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:05,112 INFO L87 Difference]: Start difference. First operand 991 states and 1339 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 17:39:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:14,890 INFO L93 Difference]: Finished difference Result 2638 states and 3653 transitions. [2021-11-23 17:39:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:14,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-23 17:39:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:14,915 INFO L225 Difference]: With dead ends: 2638 [2021-11-23 17:39:14,916 INFO L226 Difference]: Without dead ends: 1978 [2021-11-23 17:39:14,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 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 17:39:14,918 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 353 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 199 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 17:39:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-11-23 17:39:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-11-23 17:39:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2281234193222053) internal successors, (2428), 1977 states have internal predecessors, (2428), 0 states have call successors, (0), 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 17:39:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2428 transitions. [2021-11-23 17:39:14,969 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2428 transitions. Word has length 104 [2021-11-23 17:39:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:14,970 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2428 transitions. [2021-11-23 17:39:14,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 17:39:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2428 transitions. [2021-11-23 17:39:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-23 17:39:14,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:14,977 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 17:39:14,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:15,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:15,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -378917936, now seen corresponding path program 1 times [2021-11-23 17:39:15,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:15,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775419594] [2021-11-23 17:39:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:15,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:15,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:15,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:15,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:39:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:15,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:39:15,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:16,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:21,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775419594] [2021-11-23 17:39:21,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775419594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487393789] [2021-11-23 17:39:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:21,567 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:21,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:21,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:21,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:39:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:39:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 81 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:24,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 81 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:25,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1487393789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:25,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619510420] [2021-11-23 17:39:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:25,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:25,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:39:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 17:39:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:39:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 87 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:27,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:29,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619510420] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:39:29,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:39:29,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 8, 8, 5] total 22 [2021-11-23 17:39:29,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223376176] [2021-11-23 17:39:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:29,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:39:29,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:39:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:39:29,062 INFO L87 Difference]: Start difference. First operand 1978 states and 2428 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 0 states have call successors, (0), 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 17:39:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:39,845 INFO L93 Difference]: Finished difference Result 4001 states and 5208 transitions. [2021-11-23 17:39:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:39:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2021-11-23 17:39:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:39,861 INFO L225 Difference]: With dead ends: 4001 [2021-11-23 17:39:39,862 INFO L226 Difference]: Without dead ends: 2683 [2021-11-23 17:39:39,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 1006 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:39:39,866 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 464 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:39,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 43 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-23 17:39:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-11-23 17:39:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2636. [2021-11-23 17:39:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 1.2876660341555977) internal successors, (3393), 2635 states have internal predecessors, (3393), 0 states have call successors, (0), 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 17:39:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3393 transitions. [2021-11-23 17:39:39,934 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3393 transitions. Word has length 172 [2021-11-23 17:39:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:39,935 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3393 transitions. [2021-11-23 17:39:39,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 0 states have call successors, (0), 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 17:39:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3393 transitions. [2021-11-23 17:39:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:39:39,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:39,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:39,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:40,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:40,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 17:39:40,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:40,565 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:40,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:40,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1468898373, now seen corresponding path program 1 times [2021-11-23 17:39:40,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:40,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563202561] [2021-11-23 17:39:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:40,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:40,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:40,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:40,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:39:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:40,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:39:40,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 51 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:42,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 51 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:45,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:45,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563202561] [2021-11-23 17:39:45,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563202561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:45,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366370680] [2021-11-23 17:39:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:45,857 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:45,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:45,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:39:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:45,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:39:46,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 92 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:47,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 92 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:49,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [366370680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:49,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493279394] [2021-11-23 17:39:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:49,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:49,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:39:49,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 17:39:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:39:49,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:51,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:51,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493279394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:51,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:39:51,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 8, 8] total 20 [2021-11-23 17:39:51,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025546899] [2021-11-23 17:39:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:51,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:39:51,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:39:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:39:51,164 INFO L87 Difference]: Start difference. First operand 2636 states and 3393 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:39:55,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:39:58,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:40:10,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:40:12,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:40:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:12,683 INFO L93 Difference]: Finished difference Result 5046 states and 6590 transitions. [2021-11-23 17:40:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:40:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 183 [2021-11-23 17:40:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:12,705 INFO L225 Difference]: With dead ends: 5046 [2021-11-23 17:40:12,706 INFO L226 Difference]: Without dead ends: 2965 [2021-11-23 17:40:12,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:40:12,710 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 372 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 377 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:12,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 285 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1554 Invalid, 1 Unknown, 0 Unchecked, 21.4s Time] [2021-11-23 17:40:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-23 17:40:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2021-11-23 17:40:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 1.097165991902834) internal successors, (3252), 2964 states have internal predecessors, (3252), 0 states have call successors, (0), 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 17:40:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3252 transitions. [2021-11-23 17:40:12,781 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3252 transitions. Word has length 183 [2021-11-23 17:40:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:12,782 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 3252 transitions. [2021-11-23 17:40:12,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:40:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3252 transitions. [2021-11-23 17:40:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-11-23 17:40:12,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:12,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:40:12,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:13,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-23 17:40:13,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:40:13,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:13,417 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1626796506, now seen corresponding path program 1 times [2021-11-23 17:40:13,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203783854] [2021-11-23 17:40:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:13,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:13,421 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:13,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:40:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:15,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:15,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203783854] [2021-11-23 17:40:15,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203783854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:15,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:15,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:15,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871234424] [2021-11-23 17:40:15,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:15,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:40:15,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:40:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:15,305 INFO L87 Difference]: Start difference. First operand 2965 states and 3252 transitions. Second operand has 4 states, 4 states have (on average 94.25) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 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 17:40:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:20,830 INFO L93 Difference]: Finished difference Result 5599 states and 6171 transitions. [2021-11-23 17:40:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:40:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 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 377 [2021-11-23 17:40:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:20,848 INFO L225 Difference]: With dead ends: 5599 [2021-11-23 17:40:20,848 INFO L226 Difference]: Without dead ends: 2965 [2021-11-23 17:40:20,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:20,853 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 303 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:20,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 121 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 17:40:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-23 17:40:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2021-11-23 17:40:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 1.094804318488529) internal successors, (3245), 2964 states have internal predecessors, (3245), 0 states have call successors, (0), 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 17:40:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3245 transitions. [2021-11-23 17:40:20,922 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3245 transitions. Word has length 377 [2021-11-23 17:40:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:20,924 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 3245 transitions. [2021-11-23 17:40:20,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 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 17:40:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3245 transitions. [2021-11-23 17:40:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-23 17:40:20,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:20,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:20,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:21,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:21,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1148519623, now seen corresponding path program 1 times [2021-11-23 17:40:21,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:21,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80479867] [2021-11-23 17:40:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:21,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:21,161 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:21,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:40:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:40:21,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 44 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:23,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:40:25,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:25,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80479867] [2021-11-23 17:40:25,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80479867] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:40:25,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:40:25,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 17:40:25,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867171174] [2021-11-23 17:40:25,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:25,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:25,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:40:25,324 INFO L87 Difference]: Start difference. First operand 2965 states and 3245 transitions. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 17:40:31,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:40:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:40,797 INFO L93 Difference]: Finished difference Result 6257 states and 7013 transitions. [2021-11-23 17:40:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:40,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 481 [2021-11-23 17:40:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:40,817 INFO L225 Difference]: With dead ends: 6257 [2021-11-23 17:40:40,817 INFO L226 Difference]: Without dead ends: 3952 [2021-11-23 17:40:40,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 956 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:40:40,820 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:40,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 24 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2021-11-23 17:40:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-11-23 17:40:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-11-23 17:40:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.1149076183244748) internal successors, (4405), 3951 states have internal predecessors, (4405), 0 states have call successors, (0), 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 17:40:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4405 transitions. [2021-11-23 17:40:40,915 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4405 transitions. Word has length 481 [2021-11-23 17:40:40,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:40,917 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4405 transitions. [2021-11-23 17:40:40,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 17:40:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4405 transitions. [2021-11-23 17:40:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-23 17:40:40,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:40,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:40,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:41,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:41,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1903930690, now seen corresponding path program 1 times [2021-11-23 17:40:41,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:41,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263101178] [2021-11-23 17:40:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:41,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:41,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:41,151 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:41,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:40:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:41,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-23 17:40:44,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:44,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263101178] [2021-11-23 17:40:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263101178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:44,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:44,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:40:44,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586524341] [2021-11-23 17:40:44,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:44,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:44,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:44,412 INFO L87 Difference]: Start difference. First operand 3952 states and 4405 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 17:40:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:48,513 INFO L93 Difference]: Finished difference Result 7244 states and 8146 transitions. [2021-11-23 17:40:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 505 [2021-11-23 17:40:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:48,540 INFO L225 Difference]: With dead ends: 7244 [2021-11-23 17:40:48,540 INFO L226 Difference]: Without dead ends: 3952 [2021-11-23 17:40:48,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 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 17:40:48,544 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 85 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:48,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 114 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 17:40:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-11-23 17:40:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-11-23 17:40:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.1146545178435838) internal successors, (4404), 3951 states have internal predecessors, (4404), 0 states have call successors, (0), 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 17:40:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4404 transitions. [2021-11-23 17:40:48,626 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4404 transitions. Word has length 505 [2021-11-23 17:40:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:48,627 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4404 transitions. [2021-11-23 17:40:48,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 17:40:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4404 transitions. [2021-11-23 17:40:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-11-23 17:40:48,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:48,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:48,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:48,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:48,846 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash -239515012, now seen corresponding path program 1 times [2021-11-23 17:40:48,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:48,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625066238] [2021-11-23 17:40:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:48,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:48,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:48,849 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:48,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:40:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:40:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:52,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 214 proven. 84 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:40:55,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625066238] [2021-11-23 17:40:55,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625066238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500603185] [2021-11-23 17:40:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:55,798 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:55,799 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:55,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:40:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:40:56,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:56,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [500603185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:56,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:40:56,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5] total 10 [2021-11-23 17:40:56,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622375784] [2021-11-23 17:40:56,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:56,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:56,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:56,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:40:56,945 INFO L87 Difference]: Start difference. First operand 3952 states and 4404 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 17:41:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:01,665 INFO L93 Difference]: Finished difference Result 7902 states and 8883 transitions. [2021-11-23 17:41:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:01,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 515 [2021-11-23 17:41:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:01,686 INFO L225 Difference]: With dead ends: 7902 [2021-11-23 17:41:01,686 INFO L226 Difference]: Without dead ends: 4610 [2021-11-23 17:41:01,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1542 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:41:01,690 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:01,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 428 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-23 17:41:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-23 17:41:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-11-23 17:41:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.1030592319375137) internal successors, (5084), 4609 states have internal predecessors, (5084), 0 states have call successors, (0), 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 17:41:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5084 transitions. [2021-11-23 17:41:01,787 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5084 transitions. Word has length 515 [2021-11-23 17:41:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:01,788 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5084 transitions. [2021-11-23 17:41:01,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 17:41:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5084 transitions. [2021-11-23 17:41:01,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-11-23 17:41:01,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:01,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:01,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:02,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:02,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:02,208 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2084358446, now seen corresponding path program 1 times [2021-11-23 17:41:02,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288209596] [2021-11-23 17:41:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:02,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:02,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:02,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:02,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:41:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:02,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:41:02,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 44 proven. 249 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-23 17:41:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 44 proven. 249 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-23 17:41:22,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:22,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288209596] [2021-11-23 17:41:22,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288209596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:22,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [921893631] [2021-11-23 17:41:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:22,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:22,950 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:22,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:41:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:41:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-23 17:41:24,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:24,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [921893631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:24,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:41:24,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:41:24,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816534060] [2021-11-23 17:41:24,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:24,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:24,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:41:24,073 INFO L87 Difference]: Start difference. First operand 4610 states and 5084 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 17:41:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:29,572 INFO L93 Difference]: Finished difference Result 9876 states and 10997 transitions. [2021-11-23 17:41:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 596 [2021-11-23 17:41:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:29,602 INFO L225 Difference]: With dead ends: 9876 [2021-11-23 17:41:29,603 INFO L226 Difference]: Without dead ends: 5926 [2021-11-23 17:41:29,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1785 GetRequests, 1780 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:41:29,607 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 330 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:29,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 427 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 17:41:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-11-23 17:41:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2021-11-23 17:41:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.089451476793249) internal successors, (6455), 5925 states have internal predecessors, (6455), 0 states have call successors, (0), 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 17:41:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6455 transitions. [2021-11-23 17:41:29,703 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6455 transitions. Word has length 596 [2021-11-23 17:41:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:29,705 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6455 transitions. [2021-11-23 17:41:29,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 17:41:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6455 transitions. [2021-11-23 17:41:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2021-11-23 17:41:29,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:29,716 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:41:29,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:29,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 17:41:30,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:30,134 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash -781736135, now seen corresponding path program 1 times [2021-11-23 17:41:30,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:30,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847709696] [2021-11-23 17:41:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:30,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:30,138 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:30,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:41:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:41:30,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 376 proven. 317 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-23 17:41:33,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 376 proven. 317 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-23 17:41:50,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:50,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847709696] [2021-11-23 17:41:50,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847709696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:50,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163211320] [2021-11-23 17:41:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:50,464 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:50,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:50,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 17:41:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:50,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:41:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 17:41:51,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:51,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1163211320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:51,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:41:51,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 17:41:51,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804716936] [2021-11-23 17:41:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:51,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:51,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:41:51,838 INFO L87 Difference]: Start difference. First operand 5926 states and 6455 transitions. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 17:41:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:57,617 INFO L93 Difference]: Finished difference Result 12508 states and 13755 transitions. [2021-11-23 17:41:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:57,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 741 [2021-11-23 17:41:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:57,643 INFO L225 Difference]: With dead ends: 12508 [2021-11-23 17:41:57,643 INFO L226 Difference]: Without dead ends: 7242 [2021-11-23 17:41:57,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2220 GetRequests, 2214 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:41:57,650 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:57,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 423 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 17:41:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2021-11-23 17:41:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 7242. [2021-11-23 17:41:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 1.0805137411959673) internal successors, (7824), 7241 states have internal predecessors, (7824), 0 states have call successors, (0), 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 17:41:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 7824 transitions. [2021-11-23 17:41:57,832 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 7824 transitions. Word has length 741 [2021-11-23 17:41:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:57,833 INFO L470 AbstractCegarLoop]: Abstraction has 7242 states and 7824 transitions. [2021-11-23 17:41:57,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 17:41:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 7824 transitions. [2021-11-23 17:41:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-11-23 17:41:57,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:57,847 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:57,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:58,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:58,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:58,259 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -209229755, now seen corresponding path program 1 times [2021-11-23 17:41:58,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:58,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307987975] [2021-11-23 17:41:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:58,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:58,265 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:41:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:58,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:41:58,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 570 proven. 249 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-11-23 17:42:01,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 570 proven. 249 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-11-23 17:42:18,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307987975] [2021-11-23 17:42:18,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307987975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:18,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767245821] [2021-11-23 17:42:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:18,987 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:18,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:18,995 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:18,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:42:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:19,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:42:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 471 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2021-11-23 17:42:20,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:42:20,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1767245821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:42:20,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:42:20,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:42:20,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003233799] [2021-11-23 17:42:20,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:20,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:42:20,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:42:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:42:20,288 INFO L87 Difference]: Start difference. First operand 7242 states and 7824 transitions. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 17:42:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:24,818 INFO L93 Difference]: Finished difference Result 15798 states and 17175 transitions. [2021-11-23 17:42:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:42:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 772 [2021-11-23 17:42:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:24,834 INFO L225 Difference]: With dead ends: 15798 [2021-11-23 17:42:24,834 INFO L226 Difference]: Without dead ends: 9216 [2021-11-23 17:42:24,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2313 GetRequests, 2308 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:42:24,840 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:24,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 437 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 17:42:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-11-23 17:42:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8558. [2021-11-23 17:42:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 1.0508355732149117) internal successors, (8992), 8557 states have internal predecessors, (8992), 0 states have call successors, (0), 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 17:42:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 8992 transitions. [2021-11-23 17:42:24,993 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 8992 transitions. Word has length 772 [2021-11-23 17:42:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:24,994 INFO L470 AbstractCegarLoop]: Abstraction has 8558 states and 8992 transitions. [2021-11-23 17:42:24,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 17:42:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 8992 transitions. [2021-11-23 17:42:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2021-11-23 17:42:25,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:25,006 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:25,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:25,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-23 17:42:25,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:25,421 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -90211282, now seen corresponding path program 1 times [2021-11-23 17:42:25,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:25,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143014810] [2021-11-23 17:42:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:25,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:25,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:25,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:42:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:25,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:42:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 573 proven. 249 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-11-23 17:42:27,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 573 proven. 249 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-11-23 17:42:42,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143014810] [2021-11-23 17:42:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143014810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1006057140] [2021-11-23 17:42:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:42,615 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:42,616 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:42,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:42:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:42,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:42:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-23 17:42:43,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:42:43,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1006057140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:42:43,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:42:43,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:42:43,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948310470] [2021-11-23 17:42:43,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:43,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:42:43,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:42:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:42:43,769 INFO L87 Difference]: Start difference. First operand 8558 states and 8992 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 17:42:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:48,076 INFO L93 Difference]: Finished difference Result 18430 states and 19522 transitions. [2021-11-23 17:42:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:42:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 773 [2021-11-23 17:42:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:48,093 INFO L225 Difference]: With dead ends: 18430 [2021-11-23 17:42:48,094 INFO L226 Difference]: Without dead ends: 10532 [2021-11-23 17:42:48,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2316 GetRequests, 2311 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:42:48,100 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 350 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:48,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 377 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:42:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10532 states. [2021-11-23 17:42:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10532 to 10532. [2021-11-23 17:42:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 1.0513721393979678) internal successors, (11072), 10531 states have internal predecessors, (11072), 0 states have call successors, (0), 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 17:42:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 11072 transitions. [2021-11-23 17:42:48,299 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 11072 transitions. Word has length 773 [2021-11-23 17:42:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:48,300 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 11072 transitions. [2021-11-23 17:42:48,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 17:42:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 11072 transitions. [2021-11-23 17:42:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2021-11-23 17:42:48,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:48,369 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:48,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:48,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:48,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:48,770 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash 420380968, now seen corresponding path program 1 times [2021-11-23 17:42:48,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:48,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092744634] [2021-11-23 17:42:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:48,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:48,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:48,778 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:48,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:42:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:49,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:42:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1102 proven. 249 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2021-11-23 17:42:51,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1102 proven. 249 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2021-11-23 17:43:07,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:07,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092744634] [2021-11-23 17:43:07,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092744634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:07,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946760925] [2021-11-23 17:43:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:07,629 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:07,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:07,630 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:07,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 17:43:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:43:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 817 proven. 0 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2021-11-23 17:43:10,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:10,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1946760925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:10,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:43:10,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:43:10,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505218633] [2021-11-23 17:43:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:10,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:43:10,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:43:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:43:10,886 INFO L87 Difference]: Start difference. First operand 10532 states and 11072 transitions. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 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 17:43:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:15,242 INFO L93 Difference]: Finished difference Result 20736 states and 21827 transitions. [2021-11-23 17:43:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:43:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 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 1001 [2021-11-23 17:43:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:15,267 INFO L225 Difference]: With dead ends: 20736 [2021-11-23 17:43:15,267 INFO L226 Difference]: Without dead ends: 10864 [2021-11-23 17:43:15,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3000 GetRequests, 2994 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:43:15,277 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 319 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:15,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 444 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 17:43:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10864 states. [2021-11-23 17:43:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 10861. [2021-11-23 17:43:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.0502762430939228) internal successors, (11406), 10860 states have internal predecessors, (11406), 0 states have call successors, (0), 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 17:43:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11406 transitions. [2021-11-23 17:43:15,465 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11406 transitions. Word has length 1001 [2021-11-23 17:43:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:15,466 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11406 transitions. [2021-11-23 17:43:15,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 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 17:43:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11406 transitions. [2021-11-23 17:43:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2021-11-23 17:43:15,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:15,490 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 17:43:15,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:15,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:15,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:15,908 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1784688906, now seen corresponding path program 1 times [2021-11-23 17:43:15,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:15,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564243113] [2021-11-23 17:43:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:15,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:15,914 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:15,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:43:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:43:16,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 1501 proven. 249 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2021-11-23 17:43:18,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 1501 proven. 249 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2021-11-23 17:43:34,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564243113] [2021-11-23 17:43:34,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564243113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027701675] [2021-11-23 17:43:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:34,611 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:34,612 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:34,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:43:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:43:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2021-11-23 17:43:38,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:38,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027701675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:38,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:43:38,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:43:38,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526029266] [2021-11-23 17:43:38,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:38,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:43:38,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:43:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:43:38,402 INFO L87 Difference]: Start difference. First operand 10861 states and 11406 transitions. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 17:43:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:43,009 INFO L93 Difference]: Finished difference Result 21062 states and 22148 transitions. [2021-11-23 17:43:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:43:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 1113 [2021-11-23 17:43:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:43,024 INFO L225 Difference]: With dead ends: 21062 [2021-11-23 17:43:43,024 INFO L226 Difference]: Without dead ends: 10861 [2021-11-23 17:43:43,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3338 GetRequests, 3331 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:43:43,032 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 676 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:43,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 16 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 17:43:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-11-23 17:43:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10861. [2021-11-23 17:43:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.0478821362799264) internal successors, (11380), 10860 states have internal predecessors, (11380), 0 states have call successors, (0), 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 17:43:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11380 transitions. [2021-11-23 17:43:43,226 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11380 transitions. Word has length 1113 [2021-11-23 17:43:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:43,227 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11380 transitions. [2021-11-23 17:43:43,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 17:43:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11380 transitions. [2021-11-23 17:43:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1172 [2021-11-23 17:43:43,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:43,253 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:43,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:43,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:43,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:43,670 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 446008967, now seen corresponding path program 1 times [2021-11-23 17:43:43,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:43,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567894552] [2021-11-23 17:43:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:43,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:43,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:43,675 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:43,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:43:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:43:44,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1617 proven. 249 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2021-11-23 17:43:46,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1617 proven. 249 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2021-11-23 17:44:03,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:03,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567894552] [2021-11-23 17:44:03,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567894552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:03,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [965853977] [2021-11-23 17:44:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:03,306 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:03,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:03,307 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:03,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 17:44:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:03,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1017 proven. 0 refuted. 0 times theorem prover too weak. 1731 trivial. 0 not checked. [2021-11-23 17:44:07,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:07,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [965853977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:07,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:44:07,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2021-11-23 17:44:07,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21901344] [2021-11-23 17:44:07,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:07,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:44:07,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:44:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:44:07,527 INFO L87 Difference]: Start difference. First operand 10861 states and 11380 transitions. Second operand has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 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 17:44:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:12,706 INFO L93 Difference]: Finished difference Result 22049 states and 23262 transitions. [2021-11-23 17:44:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:44:12,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 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 1171 [2021-11-23 17:44:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:12,723 INFO L225 Difference]: With dead ends: 22049 [2021-11-23 17:44:12,723 INFO L226 Difference]: Without dead ends: 11848 [2021-11-23 17:44:12,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3510 GetRequests, 3503 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:44:12,729 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 347 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:12,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 448 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 17:44:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-11-23 17:44:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11190. [2021-11-23 17:44:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0441505049602289) internal successors, (11683), 11189 states have internal predecessors, (11683), 0 states have call successors, (0), 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 17:44:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11683 transitions. [2021-11-23 17:44:12,901 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11683 transitions. Word has length 1171 [2021-11-23 17:44:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:12,902 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11683 transitions. [2021-11-23 17:44:12,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 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 17:44:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11683 transitions. [2021-11-23 17:44:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1277 [2021-11-23 17:44:12,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:12,927 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:12,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-23 17:44:13,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:13,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:13,330 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash -72958475, now seen corresponding path program 1 times [2021-11-23 17:44:13,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985159758] [2021-11-23 17:44:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:13,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:13,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:13,336 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:13,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:44:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:13,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:44:13,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 1772 proven. 249 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2021-11-23 17:44:16,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 1772 proven. 249 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2021-11-23 17:44:32,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:32,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985159758] [2021-11-23 17:44:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985159758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:32,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802154017] [2021-11-23 17:44:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:32,624 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:32,629 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:32,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 17:44:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:44:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 1644 proven. 214 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2021-11-23 17:44:40,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 1790 proven. 68 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2021-11-23 17:44:44,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802154017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:44,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468559208] [2021-11-23 17:44:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:44,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:44,673 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:44,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 17:44:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:44,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:44:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 1843 proven. 0 refuted. 0 times theorem prover too weak. 1145 trivial. 0 not checked. [2021-11-23 17:44:48,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:48,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468559208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:48,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:44:48,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 8, 7] total 17 [2021-11-23 17:44:48,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36671310] [2021-11-23 17:44:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:48,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:44:48,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:44:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:44:48,324 INFO L87 Difference]: Start difference. First operand 11190 states and 11683 transitions. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 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 17:44:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:52,958 INFO L93 Difference]: Finished difference Result 22142 states and 23134 transitions. [2021-11-23 17:44:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:44:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 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 1276 [2021-11-23 17:44:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:52,972 INFO L225 Difference]: With dead ends: 22142 [2021-11-23 17:44:52,972 INFO L226 Difference]: Without dead ends: 11612 [2021-11-23 17:44:52,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6377 GetRequests, 6361 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:44:52,977 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 174 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:52,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 586 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 17:44:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11612 states. [2021-11-23 17:44:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11612 to 11519. [2021-11-23 17:44:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0432366730335128) internal successors, (12016), 11518 states have internal predecessors, (12016), 0 states have call successors, (0), 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 17:44:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 12016 transitions. [2021-11-23 17:44:53,119 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 12016 transitions. Word has length 1276 [2021-11-23 17:44:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:53,120 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 12016 transitions. [2021-11-23 17:44:53,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 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 17:44:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 12016 transitions. [2021-11-23 17:44:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2021-11-23 17:44:53,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:53,146 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:53,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:53,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:53,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-23 17:44:53,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:53,772 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1240167989, now seen corresponding path program 1 times [2021-11-23 17:44:53,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:53,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734804157] [2021-11-23 17:44:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:53,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:53,778 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:53,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:44:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:44:54,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3464 backedges. 1934 proven. 249 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2021-11-23 17:44:56,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3464 backedges. 1934 proven. 249 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2021-11-23 17:45:13,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:13,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734804157] [2021-11-23 17:45:13,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734804157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:13,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1646944988] [2021-11-23 17:45:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:13,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:13,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:13,097 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:13,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 17:45:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:45:13,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3464 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 3345 trivial. 0 not checked. [2021-11-23 17:45:14,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:14,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1646944988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:14,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:45:14,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:45:14,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484463088] [2021-11-23 17:45:14,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:14,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:45:14,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:45:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:45:14,956 INFO L87 Difference]: Start difference. First operand 11519 states and 12016 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 17:45:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:19,512 INFO L93 Difference]: Finished difference Result 24352 states and 25416 transitions. [2021-11-23 17:45:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:45:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 1277 [2021-11-23 17:45:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:19,525 INFO L225 Difference]: With dead ends: 24352 [2021-11-23 17:45:19,525 INFO L226 Difference]: Without dead ends: 13164 [2021-11-23 17:45:19,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3828 GetRequests, 3823 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:45:19,530 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 318 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:19,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 430 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 17:45:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2021-11-23 17:45:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 11848. [2021-11-23 17:45:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0308094876340002) internal successors, (12212), 11847 states have internal predecessors, (12212), 0 states have call successors, (0), 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 17:45:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12212 transitions. [2021-11-23 17:45:19,670 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12212 transitions. Word has length 1277 [2021-11-23 17:45:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:19,671 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12212 transitions. [2021-11-23 17:45:19,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 17:45:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12212 transitions. [2021-11-23 17:45:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1334 [2021-11-23 17:45:19,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:19,690 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:19,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:19,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:20,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:20,092 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -900924643, now seen corresponding path program 1 times [2021-11-23 17:45:20,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:20,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076955932] [2021-11-23 17:45:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:20,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:20,098 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:20,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:45:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:45:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3419 backedges. 1910 proven. 249 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-11-23 17:45:23,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3419 backedges. 1910 proven. 249 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-11-23 17:45:40,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076955932] [2021-11-23 17:45:40,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076955932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [493135983] [2021-11-23 17:45:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:40,450 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:40,470 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-23 17:45:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:45:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3419 backedges. 1137 proven. 0 refuted. 0 times theorem prover too weak. 2282 trivial. 0 not checked. [2021-11-23 17:45:44,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:44,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [493135983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:44,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:45:44,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2021-11-23 17:45:44,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519888905] [2021-11-23 17:45:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:44,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:45:44,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:44,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:45:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:45:44,476 INFO L87 Difference]: Start difference. First operand 11848 states and 12212 transitions. Second operand has 7 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 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 17:45:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:50,933 INFO L93 Difference]: Finished difference Result 24753 states and 25521 transitions. [2021-11-23 17:45:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 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 1333 [2021-11-23 17:45:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:50,947 INFO L225 Difference]: With dead ends: 24753 [2021-11-23 17:45:50,947 INFO L226 Difference]: Without dead ends: 11591 [2021-11-23 17:45:50,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3998 GetRequests, 3988 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:45:50,953 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 902 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:50,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 47 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-23 17:45:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11591 states. [2021-11-23 17:45:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11591 to 11190. [2021-11-23 17:45:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0244883367593172) internal successors, (11463), 11189 states have internal predecessors, (11463), 0 states have call successors, (0), 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 17:45:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11463 transitions. [2021-11-23 17:45:51,094 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11463 transitions. Word has length 1333 [2021-11-23 17:45:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:51,095 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11463 transitions. [2021-11-23 17:45:51,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 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 17:45:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11463 transitions. [2021-11-23 17:45:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1572 [2021-11-23 17:45:51,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:51,112 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:51,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:51,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:51,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:51,513 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1692063889, now seen corresponding path program 1 times [2021-11-23 17:45:51,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:51,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142281089] [2021-11-23 17:45:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:51,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:51,520 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:51,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:45:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:45:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 2506 proven. 249 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2021-11-23 17:45:54,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 2506 proven. 249 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2021-11-23 17:46:12,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142281089] [2021-11-23 17:46:12,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142281089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946297246] [2021-11-23 17:46:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:12,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:46:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:46:12,711 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:46:12,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 17:46:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:46:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 2388 proven. 0 refuted. 0 times theorem prover too weak. 2341 trivial. 0 not checked. [2021-11-23 17:46:17,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:46:17,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1946297246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:46:17,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:46:17,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:46:17,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53961195] [2021-11-23 17:46:17,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:46:17,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:46:17,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:46:17,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:46:17,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:46:17,246 INFO L87 Difference]: Start difference. First operand 11190 states and 11463 transitions. Second operand has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 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 17:46:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:21,271 INFO L93 Difference]: Finished difference Result 21723 states and 22265 transitions. [2021-11-23 17:46:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:46:21,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 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 1571 [2021-11-23 17:46:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:21,282 INFO L225 Difference]: With dead ends: 21723 [2021-11-23 17:46:21,282 INFO L226 Difference]: Without dead ends: 11193 [2021-11-23 17:46:21,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4710 GetRequests, 4704 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:46:21,288 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 281 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:21,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 437 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 17:46:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11193 states. [2021-11-23 17:46:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11193 to 11190. [2021-11-23 17:46:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.024130842792028) internal successors, (11459), 11189 states have internal predecessors, (11459), 0 states have call successors, (0), 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 17:46:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11459 transitions. [2021-11-23 17:46:21,395 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11459 transitions. Word has length 1571 [2021-11-23 17:46:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:21,396 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11459 transitions. [2021-11-23 17:46:21,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 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 17:46:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11459 transitions. [2021-11-23 17:46:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1609 [2021-11-23 17:46:21,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:21,418 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:46:21,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:21,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:21,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:46:21,826 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash 19168045, now seen corresponding path program 1 times [2021-11-23 17:46:21,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:21,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548604552] [2021-11-23 17:46:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:21,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:21,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:21,834 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:21,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 17:46:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:46:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4999 backedges. 2612 proven. 249 refuted. 0 times theorem prover too weak. 2138 trivial. 0 not checked. [2021-11-23 17:46:25,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4999 backedges. 2612 proven. 249 refuted. 0 times theorem prover too weak. 2138 trivial. 0 not checked. [2021-11-23 17:46:42,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548604552] [2021-11-23 17:46:42,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548604552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1860528371] [2021-11-23 17:46:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:42,604 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:46:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:46:42,604 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:46:42,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-23 17:46:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:43,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:46:43,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4999 backedges. 3025 proven. 0 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2021-11-23 17:46:46,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:46:46,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1860528371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:46:46,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:46:46,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2021-11-23 17:46:46,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797929732] [2021-11-23 17:46:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:46:46,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:46:46,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:46:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:46:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:46:46,472 INFO L87 Difference]: Start difference. First operand 11190 states and 11459 transitions. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 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 17:46:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:54,271 INFO L93 Difference]: Finished difference Result 23394 states and 23957 transitions. [2021-11-23 17:46:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:46:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 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 1608 [2021-11-23 17:46:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:54,303 INFO L225 Difference]: With dead ends: 23394 [2021-11-23 17:46:54,303 INFO L226 Difference]: Without dead ends: 12535 [2021-11-23 17:46:54,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4823 GetRequests, 4815 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:46:54,311 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 398 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:54,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 450 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 17:46:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12535 states. [2021-11-23 17:46:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12535 to 12506. [2021-11-23 17:46:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0221511395441822) internal successors, (12782), 12505 states have internal predecessors, (12782), 0 states have call successors, (0), 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 17:46:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12782 transitions. [2021-11-23 17:46:54,528 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12782 transitions. Word has length 1608 [2021-11-23 17:46:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:54,529 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12782 transitions. [2021-11-23 17:46:54,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 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 17:46:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12782 transitions. [2021-11-23 17:46:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1762 [2021-11-23 17:46:54,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:54,554 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:54,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:54,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-23 17:46:54,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:46:54,956 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:54,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:54,957 INFO L85 PathProgramCache]: Analyzing trace with hash -75707640, now seen corresponding path program 1 times [2021-11-23 17:46:54,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:54,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122615189] [2021-11-23 17:46:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:54,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:54,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:54,964 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:54,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:46:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:46:55,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5254 backedges. 2721 proven. 249 refuted. 0 times theorem prover too weak. 2284 trivial. 0 not checked. [2021-11-23 17:46:58,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:47:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5254 backedges. 2721 proven. 249 refuted. 0 times theorem prover too weak. 2284 trivial. 0 not checked. [2021-11-23 17:47:17,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122615189] [2021-11-23 17:47:17,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122615189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:47:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485531459] [2021-11-23 17:47:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:17,198 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:17,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:47:17,199 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:47:17,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 17:47:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:18,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:47:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5254 backedges. 3196 proven. 0 refuted. 0 times theorem prover too weak. 2058 trivial. 0 not checked. [2021-11-23 17:47:20,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:47:20,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485531459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:47:20,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:47:20,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:47:20,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59173700] [2021-11-23 17:47:20,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:47:20,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:47:20,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:47:20,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:20,537 INFO L87 Difference]: Start difference. First operand 12506 states and 12782 transitions. Second operand has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 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 17:47:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:47:24,802 INFO L93 Difference]: Finished difference Result 25010 states and 25574 transitions. [2021-11-23 17:47:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:47:24,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 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 1761 [2021-11-23 17:47:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:47:24,816 INFO L225 Difference]: With dead ends: 25010 [2021-11-23 17:47:24,816 INFO L226 Difference]: Without dead ends: 12506 [2021-11-23 17:47:24,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5280 GetRequests, 5275 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:24,820 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 176 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:47:24,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 417 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:47:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-11-23 17:47:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12506. [2021-11-23 17:47:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0201519392243104) internal successors, (12757), 12505 states have internal predecessors, (12757), 0 states have call successors, (0), 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 17:47:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12757 transitions. [2021-11-23 17:47:24,961 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12757 transitions. Word has length 1761 [2021-11-23 17:47:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:47:24,962 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12757 transitions. [2021-11-23 17:47:24,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 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 17:47:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12757 transitions. [2021-11-23 17:47:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2275 [2021-11-23 17:47:25,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:47:25,050 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:47:25,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:25,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:25,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:25,462 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:47:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:47:25,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2121474766, now seen corresponding path program 1 times [2021-11-23 17:47:25,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:47:25,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188376698] [2021-11-23 17:47:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:25,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:47:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:47:25,473 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:47:25,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 17:47:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:47:26,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9498 backedges. 4077 proven. 249 refuted. 0 times theorem prover too weak. 5172 trivial. 0 not checked. [2021-11-23 17:47:30,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:47:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9498 backedges. 4077 proven. 249 refuted. 0 times theorem prover too weak. 5172 trivial. 0 not checked. [2021-11-23 17:47:51,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:51,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188376698] [2021-11-23 17:47:51,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188376698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:47:51,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1983892366] [2021-11-23 17:47:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:51,530 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:47:51,531 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:47:51,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-23 17:47:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:47:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9498 backedges. 4775 proven. 776 refuted. 0 times theorem prover too weak. 3947 trivial. 0 not checked. [2021-11-23 17:47:59,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9498 backedges. 4775 proven. 776 refuted. 0 times theorem prover too weak. 3947 trivial. 0 not checked. [2021-11-23 17:48:16,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1983892366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097380310] [2021-11-23 17:48:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:48:16,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:48:16,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:48:16,961 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:48:16,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 17:48:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:48:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:48:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9498 backedges. 4077 proven. 249 refuted. 0 times theorem prover too weak. 5172 trivial. 0 not checked. [2021-11-23 17:48:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9498 backedges. 4796 proven. 438 refuted. 0 times theorem prover too weak. 4264 trivial. 0 not checked. [2021-11-23 17:48:40,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097380310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:40,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:48:40,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 4, 8] total 17 [2021-11-23 17:48:40,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51261052] [2021-11-23 17:48:40,308 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:48:40,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:48:40,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:48:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:48:40,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:48:40,315 INFO L87 Difference]: Start difference. First operand 12506 states and 12757 transitions. Second operand has 17 states, 17 states have (on average 135.41176470588235) internal successors, (2302), 17 states have internal predecessors, (2302), 0 states have call successors, (0), 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 17:49:10,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:30,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:03,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:07,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:15,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:25,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:30,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:33,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:50,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:55,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:57,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:08,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:51:21,033 INFO L93 Difference]: Finished difference Result 29787 states and 30403 transitions. [2021-11-23 17:51:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 17:51:21,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 135.41176470588235) internal successors, (2302), 17 states have internal predecessors, (2302), 0 states have call successors, (0), 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 2274 [2021-11-23 17:51:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:51:21,055 INFO L225 Difference]: With dead ends: 29787 [2021-11-23 17:51:21,055 INFO L226 Difference]: Without dead ends: 17941 [2021-11-23 17:51:21,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13689 GetRequests, 13648 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 17:51:21,097 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4389 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9851 mSolverCounterSat, 697 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4389 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 10549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 9851 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:51:21,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4389 Valid, 151 Invalid, 10549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 9851 Invalid, 1 Unknown, 0 Unchecked, 155.2s Time] [2021-11-23 17:51:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17941 states. [2021-11-23 17:51:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17941 to 13822. [2021-11-23 17:51:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0205484407785255) internal successors, (14105), 13821 states have internal predecessors, (14105), 0 states have call successors, (0), 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 17:51:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14105 transitions. [2021-11-23 17:51:21,266 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14105 transitions. Word has length 2274 [2021-11-23 17:51:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:51:21,267 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14105 transitions. [2021-11-23 17:51:21,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 135.41176470588235) internal successors, (2302), 17 states have internal predecessors, (2302), 0 states have call successors, (0), 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 17:51:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14105 transitions. [2021-11-23 17:51:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2318 [2021-11-23 17:51:21,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:51:21,426 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:51:21,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:51:21,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 17:51:21,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 17:51:22,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:51:22,040 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:51:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:51:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1104468001, now seen corresponding path program 1 times [2021-11-23 17:51:22,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:51:22,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963818696] [2021-11-23 17:51:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:22,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:51:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:51:22,055 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:51:22,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e455bc-5bfc-4cf7-b43b-f12282dd9e34/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 17:51:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2464 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:51:22,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10276 backedges. 5163 proven. 1450 refuted. 0 times theorem prover too weak. 3663 trivial. 0 not checked. [2021-11-23 17:51:27,355 INFO L328 TraceCheckSpWp]: Computing backward predicates...