./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 022102d12c6d0c5097c2cad24d28685bf677a3959fa1edca410f13c7d5b845fd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 04:09:30,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:09:30,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:09:30,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:09:30,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:09:30,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:09:30,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:09:30,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:09:30,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:09:30,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:09:30,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:09:30,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:09:30,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:09:30,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:09:30,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:09:30,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:09:30,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:09:30,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:09:30,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:09:30,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:09:30,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:09:30,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:09:30,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:09:30,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:09:30,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:09:30,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:09:30,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:09:30,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:09:30,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:09:30,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:09:30,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:09:30,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:09:30,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:09:30,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:09:30,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:09:30,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:09:30,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:09:30,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:09:30,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:09:30,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:09:30,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:09:30,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:09:30,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:09:30,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:09:30,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:09:30,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:09:30,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:09:30,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:09:30,340 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:09:30,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:09:30,341 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:09:30,341 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:09:30,342 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:09:30,343 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:09:30,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:09:30,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:09:30,343 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:09:30,344 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:09:30,344 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:09:30,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:09:30,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:09:30,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:09:30,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:09:30,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:09:30,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:09:30,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:09:30,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:09:30,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:09:30,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:09:30,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:09:30,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:09:30,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:09:30,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:09:30,349 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:09:30,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:09:30,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:09:30,350 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:09:30,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:09:30,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:09:30,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:09:30,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022102d12c6d0c5097c2cad24d28685bf677a3959fa1edca410f13c7d5b845fd [2022-11-03 04:09:30,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:09:30,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:09:30,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:09:30,774 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:09:30,775 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:09:30,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c [2022-11-03 04:09:30,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/4910b8f90/ca83c00540f04f34a6ca8919b61a8ff6/FLAG667107fee [2022-11-03 04:09:31,726 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:09:31,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c [2022-11-03 04:09:31,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/4910b8f90/ca83c00540f04f34a6ca8919b61a8ff6/FLAG667107fee [2022-11-03 04:09:31,798 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/4910b8f90/ca83c00540f04f34a6ca8919b61a8ff6 [2022-11-03 04:09:31,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:09:31,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:09:31,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:09:31,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:09:31,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:09:31,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:09:31" (1/1) ... [2022-11-03 04:09:31,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1671e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:31, skipping insertion in model container [2022-11-03 04:09:31,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:09:31" (1/1) ... [2022-11-03 04:09:31,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:09:31,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:09:32,256 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_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c[1107,1120] [2022-11-03 04:09:32,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:09:32,753 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:09:32,767 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_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c[1107,1120] [2022-11-03 04:09:32,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:09:32,967 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:09:32,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32 WrapperNode [2022-11-03 04:09:32,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:09:32,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:09:32,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:09:32,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:09:32,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,363 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2311 [2022-11-03 04:09:33,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:09:33,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:09:33,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:09:33,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:09:33,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:09:33,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:09:33,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:09:33,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:09:33,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (1/1) ... [2022-11-03 04:09:33,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:09:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:33,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:09:33,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:09:33,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:09:33,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:09:34,450 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:09:34,453 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:09:42,056 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:09:53,368 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:09:53,369 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:09:53,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:09:53 BoogieIcfgContainer [2022-11-03 04:09:53,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:09:53,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:09:53,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:09:53,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:09:53,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:09:31" (1/3) ... [2022-11-03 04:09:53,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1a4ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:09:53, skipping insertion in model container [2022-11-03 04:09:53,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:32" (2/3) ... [2022-11-03 04:09:53,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1a4ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:09:53, skipping insertion in model container [2022-11-03 04:09:53,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:09:53" (3/3) ... [2022-11-03 04:09:53,385 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p5.c [2022-11-03 04:09:53,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:09:53,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:09:53,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:09:53,499 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@400870c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:09:53,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:09:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:09:53,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:53,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:09:53,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:53,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:53,526 INFO L85 PathProgramCache]: Analyzing trace with hash 28728552, now seen corresponding path program 1 times [2022-11-03 04:09:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:53,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834926915] [2022-11-03 04:09:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:09:54,243 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:09:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:09:54,528 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:09:54,531 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:09:54,535 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:09:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:09:54,543 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:09:54,549 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:09:54,601 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:09:54,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:09:54 BoogieIcfgContainer [2022-11-03 04:09:54,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:09:54,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:09:54,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:09:54,631 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:09:54,633 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:09:53" (3/4) ... [2022-11-03 04:09:54,637 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:09:54,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:09:54,640 INFO L158 Benchmark]: Toolchain (without parser) took 22832.11ms. Allocated memory was 111.1MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 73.6MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 240.6MB. Max. memory is 16.1GB. [2022-11-03 04:09:54,641 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 86.0MB. Free memory was 44.6MB in the beginning and 44.6MB in the end (delta: 19.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:09:54,644 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1159.60ms. Allocated memory is still 111.1MB. Free memory was 73.5MB in the beginning and 68.6MB in the end (delta: 4.8MB). Peak memory consumption was 43.6MB. Max. memory is 16.1GB. [2022-11-03 04:09:54,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 394.34ms. Allocated memory is still 111.1MB. Free memory was 68.6MB in the beginning and 47.7MB in the end (delta: 21.0MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2022-11-03 04:09:54,652 INFO L158 Benchmark]: Boogie Preprocessor took 365.85ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 47.7MB in the beginning and 91.8MB in the end (delta: -44.1MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2022-11-03 04:09:54,653 INFO L158 Benchmark]: RCFGBuilder took 19641.31ms. Allocated memory was 161.5MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 91.8MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 656.5MB. Max. memory is 16.1GB. [2022-11-03 04:09:54,655 INFO L158 Benchmark]: TraceAbstraction took 1252.72ms. Allocated memory is still 2.0GB. Free memory was 1.8GB in the beginning and 1.7GB in the end (delta: 73.4MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. [2022-11-03 04:09:54,656 INFO L158 Benchmark]: Witness Printer took 6.90ms. Allocated memory is still 2.0GB. Free memory is still 1.7GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:09:54,666 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 86.0MB. Free memory was 44.6MB in the beginning and 44.6MB in the end (delta: 19.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1159.60ms. Allocated memory is still 111.1MB. Free memory was 73.5MB in the beginning and 68.6MB in the end (delta: 4.8MB). Peak memory consumption was 43.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 394.34ms. Allocated memory is still 111.1MB. Free memory was 68.6MB in the beginning and 47.7MB in the end (delta: 21.0MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 365.85ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 47.7MB in the beginning and 91.8MB in the end (delta: -44.1MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. * RCFGBuilder took 19641.31ms. Allocated memory was 161.5MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 91.8MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 656.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1252.72ms. Allocated memory is still 2.0GB. Free memory was 1.8GB in the beginning and 1.7GB in the end (delta: 73.4MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. * Witness Printer took 6.90ms. Allocated memory is still 2.0GB. Free memory is still 1.7GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 192, overapproximation of bitwiseOr at line 200, overapproximation of bitwiseAnd at line 182. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 3); [L32] const SORT_9 msb_SORT_9 = (SORT_9)1 << (3 - 1); [L34] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 12); [L35] const SORT_44 msb_SORT_44 = (SORT_44)1 << (12 - 1); [L37] const SORT_98 mask_SORT_98 = (SORT_98)-1 >> (sizeof(SORT_98) * 8 - 17); [L38] const SORT_98 msb_SORT_98 = (SORT_98)1 << (17 - 1); [L40] const SORT_99 mask_SORT_99 = (SORT_99)-1 >> (sizeof(SORT_99) * 8 - 5); [L41] const SORT_99 msb_SORT_99 = (SORT_99)1 << (5 - 1); [L43] const SORT_102 mask_SORT_102 = (SORT_102)-1 >> (sizeof(SORT_102) * 8 - 9); [L44] const SORT_102 msb_SORT_102 = (SORT_102)1 << (9 - 1); [L46] const SORT_104 mask_SORT_104 = (SORT_104)-1 >> (sizeof(SORT_104) * 8 - 10); [L47] const SORT_104 msb_SORT_104 = (SORT_104)1 << (10 - 1); [L49] const SORT_107 mask_SORT_107 = (SORT_107)-1 >> (sizeof(SORT_107) * 8 - 11); [L50] const SORT_107 msb_SORT_107 = (SORT_107)1 << (11 - 1); [L52] const SORT_112 mask_SORT_112 = (SORT_112)-1 >> (sizeof(SORT_112) * 8 - 13); [L53] const SORT_112 msb_SORT_112 = (SORT_112)1 << (13 - 1); [L55] const SORT_115 mask_SORT_115 = (SORT_115)-1 >> (sizeof(SORT_115) * 8 - 14); [L56] const SORT_115 msb_SORT_115 = (SORT_115)1 << (14 - 1); [L58] const SORT_118 mask_SORT_118 = (SORT_118)-1 >> (sizeof(SORT_118) * 8 - 15); [L59] const SORT_118 msb_SORT_118 = (SORT_118)1 << (15 - 1); [L61] const SORT_151 mask_SORT_151 = (SORT_151)-1 >> (sizeof(SORT_151) * 8 - 7); [L62] const SORT_151 msb_SORT_151 = (SORT_151)1 << (7 - 1); [L64] const SORT_211 mask_SORT_211 = (SORT_211)-1 >> (sizeof(SORT_211) * 8 - 2); [L65] const SORT_211 msb_SORT_211 = (SORT_211)1 << (2 - 1); [L67] const SORT_370 mask_SORT_370 = (SORT_370)-1 >> (sizeof(SORT_370) * 8 - 4); [L68] const SORT_370 msb_SORT_370 = (SORT_370)1 << (4 - 1); [L70] const SORT_373 mask_SORT_373 = (SORT_373)-1 >> (sizeof(SORT_373) * 8 - 6); [L71] const SORT_373 msb_SORT_373 = (SORT_373)1 << (6 - 1); [L73] const SORT_376 mask_SORT_376 = (SORT_376)-1 >> (sizeof(SORT_376) * 8 - 8); [L74] const SORT_376 msb_SORT_376 = (SORT_376)1 << (8 - 1); [L76] const SORT_3 var_6 = 0; [L77] const SORT_9 var_11 = 2; [L78] const SORT_9 var_13 = 0; [L79] const SORT_1 var_19 = 0; [L80] const SORT_1 var_34 = 1; [L81] const SORT_44 var_45 = 0; [L82] const SORT_9 var_61 = 1; [L83] const SORT_9 var_66 = 4; [L84] const SORT_9 var_68 = 5; [L85] const SORT_9 var_72 = 3; [L86] const SORT_99 var_100 = 0; [L87] const SORT_151 var_153 = 5; [L88] const SORT_151 var_157 = 4; [L89] const SORT_151 var_161 = 3; [L90] const SORT_151 var_165 = 2; [L91] const SORT_151 var_169 = 1; [L92] const SORT_151 var_173 = 0; [L93] const SORT_44 var_196 = 2; [L94] const SORT_211 var_213 = 0; [L95] const SORT_3 var_220 = 65535; [L97] SORT_1 input_2; [L98] SORT_3 input_4; [L99] SORT_3 input_5; [L100] SORT_3 input_208; [L101] SORT_3 input_209; [L102] SORT_3 input_210; [L103] SORT_3 input_219; [L104] SORT_3 input_228; [L105] SORT_3 input_229; [L106] SORT_3 input_230; [L107] SORT_3 input_233; [L108] SORT_3 input_251; [L109] SORT_3 input_252; [L110] SORT_3 input_253; [L111] SORT_3 input_256; [L112] SORT_3 input_258; [L113] SORT_211 input_272; [L114] SORT_211 input_273; [L115] SORT_211 input_274; [L117] SORT_3 state_7 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L118] SORT_9 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_9; [L119] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_3 state_23 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L121] SORT_3 state_38 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L122] SORT_3 state_40 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L123] SORT_3 state_42 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L124] SORT_44 state_46 = __VERIFIER_nondet_ushort() & mask_SORT_44; [L125] SORT_44 state_48 = __VERIFIER_nondet_ushort() & mask_SORT_44; [L126] SORT_3 state_50 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L127] SORT_3 state_52 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L128] SORT_3 state_54 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L129] SORT_3 state_56 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L131] SORT_3 init_8_arg_1 = var_6; [L132] state_7 = init_8_arg_1 [L133] SORT_9 init_15_arg_1 = var_13; [L134] state_14 = init_15_arg_1 [L135] SORT_1 init_21_arg_1 = var_19; [L136] state_20 = init_21_arg_1 [L137] SORT_3 init_24_arg_1 = var_6; [L138] state_23 = init_24_arg_1 [L139] SORT_3 init_39_arg_1 = var_6; [L140] state_38 = init_39_arg_1 [L141] SORT_3 init_41_arg_1 = var_6; [L142] state_40 = init_41_arg_1 [L143] SORT_3 init_43_arg_1 = var_6; [L144] state_42 = init_43_arg_1 [L145] SORT_44 init_47_arg_1 = var_45; [L146] state_46 = init_47_arg_1 [L147] SORT_44 init_49_arg_1 = var_45; [L148] state_48 = init_49_arg_1 [L149] SORT_3 init_51_arg_1 = var_6; [L150] state_50 = init_51_arg_1 [L151] SORT_3 init_53_arg_1 = var_6; [L152] state_52 = init_53_arg_1 [L153] SORT_3 init_55_arg_1 = var_6; [L154] state_54 = init_55_arg_1 [L155] SORT_3 init_57_arg_1 = var_6; [L156] state_56 = init_57_arg_1 VAL [init_15_arg_1=0, init_21_arg_1=0, init_24_arg_1=0, init_39_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_47_arg_1=0, init_49_arg_1=0, init_51_arg_1=0, init_53_arg_1=0, init_55_arg_1=0, init_57_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_102=511, mask_SORT_104=1023, mask_SORT_107=2047, mask_SORT_112=8191, mask_SORT_115=16383, mask_SORT_118=32767, mask_SORT_151=127, mask_SORT_211=3, mask_SORT_3=65535, mask_SORT_370=15, mask_SORT_373=63, mask_SORT_376=255, mask_SORT_44=4095, mask_SORT_9=7, mask_SORT_98=4294967295, mask_SORT_99=31, msb_SORT_1=1, msb_SORT_102=256, msb_SORT_104=512, msb_SORT_107=1024, msb_SORT_112=4096, msb_SORT_115=8192, msb_SORT_118=16384, msb_SORT_151=64, msb_SORT_211=2, msb_SORT_3=32768, msb_SORT_370=8, msb_SORT_373=32, msb_SORT_376=128, msb_SORT_44=2048, msb_SORT_9=4, msb_SORT_98=65536, msb_SORT_99=16, state_14=0, state_20=0, state_23=0, state_38=0, state_40=0, state_42=0, state_46=0, state_48=0, state_50=0, state_52=0, state_54=0, state_56=0, state_7=0, var_100=0, var_11=2, var_13=0, var_153=5, var_157=4, var_161=3, var_165=2, var_169=1, var_173=0, var_19=0, var_196=2, var_213=0, var_220=65535, var_34=1, var_45=0, var_6=0, var_61=1, var_66=4, var_68=5, var_72=3] [L159] input_2 = __VERIFIER_nondet_uchar() [L160] input_4 = __VERIFIER_nondet_ushort() [L161] input_5 = __VERIFIER_nondet_ushort() [L162] input_208 = __VERIFIER_nondet_ushort() [L163] input_209 = __VERIFIER_nondet_ushort() [L164] input_210 = __VERIFIER_nondet_ushort() [L165] input_219 = __VERIFIER_nondet_ushort() [L166] input_228 = __VERIFIER_nondet_ushort() [L167] input_229 = __VERIFIER_nondet_ushort() [L168] input_230 = __VERIFIER_nondet_ushort() [L169] input_233 = __VERIFIER_nondet_ushort() [L170] input_251 = __VERIFIER_nondet_ushort() [L171] input_252 = __VERIFIER_nondet_ushort() [L172] input_253 = __VERIFIER_nondet_ushort() [L173] input_256 = __VERIFIER_nondet_ushort() [L174] input_258 = __VERIFIER_nondet_ushort() [L175] input_272 = __VERIFIER_nondet_uchar() [L176] input_273 = __VERIFIER_nondet_uchar() [L177] input_274 = __VERIFIER_nondet_uchar() [L180] SORT_3 var_10_arg_0 = state_7; [L181] SORT_9 var_10 = var_10_arg_0 >> 0; [L182] var_10 = var_10 & mask_SORT_9 [L183] SORT_9 var_12_arg_0 = var_10; [L184] SORT_9 var_12_arg_1 = var_11; [L185] SORT_1 var_12 = var_12_arg_0 == var_12_arg_1; [L186] SORT_9 var_16_arg_0 = state_14; [L187] SORT_1 var_16 = var_16_arg_0 >> 2; [L188] SORT_1 var_17_arg_0 = var_12; [L189] SORT_1 var_17_arg_1 = var_16; [L190] SORT_1 var_17 = var_17_arg_0 & var_17_arg_1; [L191] SORT_1 var_18_arg_0 = var_17; [L192] SORT_1 var_18 = ~var_18_arg_0; [L193] SORT_1 var_22_arg_0 = state_20; [L194] SORT_1 var_22 = ~var_22_arg_0; [L195] SORT_3 var_25_arg_0 = state_23; [L196] SORT_3 var_25_arg_1 = var_6; [L197] SORT_1 var_25 = var_25_arg_0 == var_25_arg_1; [L198] SORT_1 var_26_arg_0 = var_22; [L199] SORT_1 var_26_arg_1 = var_25; [L200] SORT_1 var_26 = var_26_arg_0 | var_26_arg_1; [L201] SORT_3 var_27_arg_0 = state_23; [L202] SORT_3 var_27_arg_1 = var_6; [L203] SORT_1 var_27 = var_27_arg_0 == var_27_arg_1; [L204] SORT_1 var_28_arg_0 = var_27; [L205] SORT_1 var_28 = ~var_28_arg_0; [L206] SORT_1 var_29_arg_0 = var_28; [L207] SORT_1 var_29_arg_1 = state_20; [L208] SORT_1 var_29 = var_29_arg_0 | var_29_arg_1; [L209] SORT_1 var_30_arg_0 = var_26; [L210] SORT_1 var_30_arg_1 = var_29; [L211] SORT_1 var_30 = var_30_arg_0 & var_30_arg_1; [L212] SORT_1 var_31_arg_0 = var_18; [L213] SORT_1 var_31_arg_1 = var_30; [L214] SORT_1 var_31 = var_31_arg_0 | var_31_arg_1; [L215] SORT_1 var_35_arg_0 = var_31; [L216] SORT_1 var_35 = ~var_35_arg_0; [L217] SORT_1 var_36_arg_0 = var_34; [L218] SORT_1 var_36_arg_1 = var_35; [L219] SORT_1 var_36 = var_36_arg_0 & var_36_arg_1; [L220] var_36 = var_36 & mask_SORT_1 [L221] SORT_1 bad_37_arg_0 = var_36; [L222] CALL __VERIFIER_assert(!(bad_37_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 04:09:54,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 022102d12c6d0c5097c2cad24d28685bf677a3959fa1edca410f13c7d5b845fd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 04:09:57,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:09:57,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:09:57,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:09:57,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:09:57,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:09:57,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:09:57,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:09:57,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:09:57,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:09:57,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:09:57,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:09:57,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:09:57,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:09:57,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:09:57,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:09:57,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:09:57,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:09:57,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:09:57,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:09:58,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:09:58,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:09:58,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:09:58,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:09:58,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:09:58,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:09:58,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:09:58,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:09:58,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:09:58,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:09:58,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:09:58,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:09:58,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:09:58,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:09:58,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:09:58,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:09:58,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:09:58,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:09:58,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:09:58,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:09:58,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:09:58,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:09:58,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:09:58,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:09:58,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:09:58,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:09:58,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:09:58,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:09:58,120 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:09:58,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:09:58,121 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:09:58,121 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:09:58,123 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:09:58,123 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:09:58,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:09:58,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:09:58,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:09:58,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:09:58,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:09:58,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:09:58,128 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:09:58,128 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:09:58,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:09:58,128 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:09:58,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:09:58,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:09:58,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:09:58,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:09:58,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:09:58,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:09:58,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:09:58,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:09:58,132 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:09:58,132 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:58,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:09:58,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:09:58,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:09:58,134 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_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022102d12c6d0c5097c2cad24d28685bf677a3959fa1edca410f13c7d5b845fd [2022-11-03 04:09:58,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:09:58,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:09:58,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:09:58,611 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:09:58,612 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:09:58,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c [2022-11-03 04:09:58,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/3b247896f/f67928d3e4a7487385841966b697c012/FLAG474277a01 [2022-11-03 04:09:59,656 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:09:59,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c [2022-11-03 04:09:59,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/3b247896f/f67928d3e4a7487385841966b697c012/FLAG474277a01 [2022-11-03 04:09:59,786 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/data/3b247896f/f67928d3e4a7487385841966b697c012 [2022-11-03 04:09:59,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:09:59,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:09:59,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:09:59,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:09:59,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:09:59,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:09:59" (1/1) ... [2022-11-03 04:09:59,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da78ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:59, skipping insertion in model container [2022-11-03 04:09:59,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:09:59" (1/1) ... [2022-11-03 04:09:59,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:09:59,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:10:00,121 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_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c[1107,1120] [2022-11-03 04:10:00,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:00,708 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:10:00,722 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_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p5.c[1107,1120] [2022-11-03 04:10:00,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:00,966 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:10:00,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00 WrapperNode [2022-11-03 04:10:00,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:00,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:00,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:10:00,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:10:00,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,173 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2311 [2022-11-03 04:10:01,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:01,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:10:01,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:10:01,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:10:01,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:10:01,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:10:01,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:10:01,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:10:01,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (1/1) ... [2022-11-03 04:10:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:01,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:01,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:10:01,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:10:01,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:10:01,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:10:02,221 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:10:02,224 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:10:04,247 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:10:04,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:10:04,273 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:10:04,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:04 BoogieIcfgContainer [2022-11-03 04:10:04,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:10:04,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:10:04,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:10:04,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:10:04,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:09:59" (1/3) ... [2022-11-03 04:10:04,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cff2e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:04, skipping insertion in model container [2022-11-03 04:10:04,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:00" (2/3) ... [2022-11-03 04:10:04,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cff2e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:04, skipping insertion in model container [2022-11-03 04:10:04,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:04" (3/3) ... [2022-11-03 04:10:04,293 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p5.c [2022-11-03 04:10:04,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:10:04,328 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:10:04,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:10:04,428 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@604380c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:10:04,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:10:04,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:10:04,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:04,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:10:04,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:10:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913361794] [2022-11-03 04:10:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:04,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:04,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:10:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:10:05,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:05,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:05,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:05,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913361794] [2022-11-03 04:10:05,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913361794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:05,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:05,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826087678] [2022-11-03 04:10:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:05,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:05,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:05,377 INFO L87 Difference]: Start difference. First operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:06,183 INFO L93 Difference]: Finished difference Result 794 states and 1191 transitions. [2022-11-03 04:10:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 04:10:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:06,204 INFO L225 Difference]: With dead ends: 794 [2022-11-03 04:10:06,204 INFO L226 Difference]: Without dead ends: 527 [2022-11-03 04:10:06,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:06,213 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 777 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:06,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 1016 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:10:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-03 04:10:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 267. [2022-11-03 04:10:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.4887218045112782) internal successors, (396), 266 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 396 transitions. [2022-11-03 04:10:06,336 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 396 transitions. Word has length 5 [2022-11-03 04:10:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:06,337 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 396 transitions. [2022-11-03 04:10:06,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 396 transitions. [2022-11-03 04:10:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:06,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:06,362 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:06,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 04:10:06,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:06,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash -464126881, now seen corresponding path program 1 times [2022-11-03 04:10:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:06,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374159553] [2022-11-03 04:10:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:06,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:06,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:06,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:10:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:08,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:08,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374159553] [2022-11-03 04:10:08,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374159553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:08,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:08,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:08,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984238797] [2022-11-03 04:10:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:08,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:08,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:08,288 INFO L87 Difference]: Start difference. First operand 267 states and 396 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:08,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:08,588 INFO L93 Difference]: Finished difference Result 1052 states and 1567 transitions. [2022-11-03 04:10:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:08,594 INFO L225 Difference]: With dead ends: 1052 [2022-11-03 04:10:08,594 INFO L226 Difference]: Without dead ends: 789 [2022-11-03 04:10:08,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:08,598 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 1540 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:08,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1540 Valid, 2294 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-03 04:10:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 273. [2022-11-03 04:10:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.4852941176470589) internal successors, (404), 272 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 404 transitions. [2022-11-03 04:10:08,618 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 404 transitions. Word has length 266 [2022-11-03 04:10:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:08,619 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 404 transitions. [2022-11-03 04:10:08,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 404 transitions. [2022-11-03 04:10:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:08,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:08,624 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:08,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:08,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:08,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1252934559, now seen corresponding path program 1 times [2022-11-03 04:10:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:08,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643845075] [2022-11-03 04:10:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:08,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:08,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:08,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:08,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:10:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:10,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:10:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:10,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:10,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:10,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643845075] [2022-11-03 04:10:10,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643845075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:10,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:10,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:10,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41547021] [2022-11-03 04:10:10,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:10,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:10,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:10,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:10,607 INFO L87 Difference]: Start difference. First operand 273 states and 404 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:12,012 INFO L93 Difference]: Finished difference Result 1060 states and 1576 transitions. [2022-11-03 04:10:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:12,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:12,017 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:12,018 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:12,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:12,020 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1929 mSDsluCounter, 2379 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1929 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:12,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1929 Valid, 2695 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 04:10:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 275. [2022-11-03 04:10:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.4817518248175183) internal successors, (406), 274 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 406 transitions. [2022-11-03 04:10:12,049 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 406 transitions. Word has length 266 [2022-11-03 04:10:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:12,049 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 406 transitions. [2022-11-03 04:10:12,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 406 transitions. [2022-11-03 04:10:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:12,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:12,056 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:12,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:12,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:12,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1428056861, now seen corresponding path program 1 times [2022-11-03 04:10:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:12,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314485472] [2022-11-03 04:10:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:12,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:12,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:12,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:12,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:10:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:13,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:13,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314485472] [2022-11-03 04:10:13,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314485472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:13,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:13,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:13,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716116406] [2022-11-03 04:10:13,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:13,752 INFO L87 Difference]: Start difference. First operand 275 states and 406 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:14,140 INFO L93 Difference]: Finished difference Result 1060 states and 1575 transitions. [2022-11-03 04:10:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:14,148 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:14,151 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:14,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:14,161 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1926 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1926 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:14,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1926 Valid, 3028 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:10:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 277. [2022-11-03 04:10:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.4782608695652173) internal successors, (408), 276 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 408 transitions. [2022-11-03 04:10:14,182 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 408 transitions. Word has length 266 [2022-11-03 04:10:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:14,185 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 408 transitions. [2022-11-03 04:10:14,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 408 transitions. [2022-11-03 04:10:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:14,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:14,191 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:14,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:14,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:14,407 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1271814683, now seen corresponding path program 1 times [2022-11-03 04:10:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602258405] [2022-11-03 04:10:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:14,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:14,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:14,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:10:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:15,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:10:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:15,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:15,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:15,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602258405] [2022-11-03 04:10:15,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602258405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:15,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:15,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005507668] [2022-11-03 04:10:15,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:15,756 INFO L87 Difference]: Start difference. First operand 277 states and 408 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:16,053 INFO L93 Difference]: Finished difference Result 1060 states and 1574 transitions. [2022-11-03 04:10:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:16,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:16,059 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:16,059 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:16,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:16,066 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1527 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:16,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 2272 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 281. [2022-11-03 04:10:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.475) internal successors, (413), 280 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 413 transitions. [2022-11-03 04:10:16,080 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 413 transitions. Word has length 266 [2022-11-03 04:10:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:16,080 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 413 transitions. [2022-11-03 04:10:16,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 413 transitions. [2022-11-03 04:10:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:16,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:16,086 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:16,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:16,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:16,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1499035673, now seen corresponding path program 1 times [2022-11-03 04:10:16,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:16,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316459218] [2022-11-03 04:10:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:16,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:16,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:16,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:16,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 04:10:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:10:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:17,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:17,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316459218] [2022-11-03 04:10:17,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316459218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:17,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:17,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375091926] [2022-11-03 04:10:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:17,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:17,628 INFO L87 Difference]: Start difference. First operand 281 states and 413 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:18,338 INFO L93 Difference]: Finished difference Result 1051 states and 1562 transitions. [2022-11-03 04:10:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:18,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:18,343 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 04:10:18,343 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 04:10:18,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:18,344 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1121 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:18,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 1336 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:10:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 04:10:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 283. [2022-11-03 04:10:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.4716312056737588) internal successors, (415), 282 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 415 transitions. [2022-11-03 04:10:18,360 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 415 transitions. Word has length 266 [2022-11-03 04:10:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:18,361 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 415 transitions. [2022-11-03 04:10:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 415 transitions. [2022-11-03 04:10:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:18,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:18,366 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:18,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:18,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:18,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1383071127, now seen corresponding path program 1 times [2022-11-03 04:10:18,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:18,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950657045] [2022-11-03 04:10:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:18,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:18,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:18,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:10:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:10:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:19,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:19,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950657045] [2022-11-03 04:10:19,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950657045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:19,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:19,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:19,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720863793] [2022-11-03 04:10:19,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:19,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:19,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:19,883 INFO L87 Difference]: Start difference. First operand 283 states and 415 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:20,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:20,649 INFO L93 Difference]: Finished difference Result 1070 states and 1587 transitions. [2022-11-03 04:10:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:20,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:20,656 INFO L225 Difference]: With dead ends: 1070 [2022-11-03 04:10:20,657 INFO L226 Difference]: Without dead ends: 807 [2022-11-03 04:10:20,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:20,659 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1525 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:20,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 2104 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:10:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-11-03 04:10:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 287. [2022-11-03 04:10:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4685314685314685) internal successors, (420), 286 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 420 transitions. [2022-11-03 04:10:20,672 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 420 transitions. Word has length 266 [2022-11-03 04:10:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:20,673 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 420 transitions. [2022-11-03 04:10:20,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 420 transitions. [2022-11-03 04:10:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:20,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:20,679 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:20,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:20,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:20,903 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1238306283, now seen corresponding path program 1 times [2022-11-03 04:10:20,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:20,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099737103] [2022-11-03 04:10:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:20,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:20,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:20,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:20,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:10:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:10:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:22,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:22,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099737103] [2022-11-03 04:10:22,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099737103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:22,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:22,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:22,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55506930] [2022-11-03 04:10:22,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:22,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:22,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:22,223 INFO L87 Difference]: Start difference. First operand 287 states and 420 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:22,519 INFO L93 Difference]: Finished difference Result 1070 states and 1586 transitions. [2022-11-03 04:10:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:22,526 INFO L225 Difference]: With dead ends: 1070 [2022-11-03 04:10:22,527 INFO L226 Difference]: Without dead ends: 807 [2022-11-03 04:10:22,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:22,531 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 1520 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:22,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 2271 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-11-03 04:10:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 289. [2022-11-03 04:10:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.4652777777777777) internal successors, (422), 288 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 422 transitions. [2022-11-03 04:10:22,547 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 422 transitions. Word has length 266 [2022-11-03 04:10:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:22,547 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 422 transitions. [2022-11-03 04:10:22,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 422 transitions. [2022-11-03 04:10:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:22,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:22,553 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:22,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:22,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:22,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash 838799853, now seen corresponding path program 1 times [2022-11-03 04:10:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507843819] [2022-11-03 04:10:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:22,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:22,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:22,778 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:22,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:10:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:23,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:23,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:24,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:24,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:24,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507843819] [2022-11-03 04:10:24,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507843819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:24,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:24,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:24,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707384812] [2022-11-03 04:10:24,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:24,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:24,076 INFO L87 Difference]: Start difference. First operand 289 states and 422 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:24,263 INFO L93 Difference]: Finished difference Result 1051 states and 1559 transitions. [2022-11-03 04:10:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:24,268 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 04:10:24,268 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 04:10:24,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:24,270 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1099 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:24,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 1532 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 04:10:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 291. [2022-11-03 04:10:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4620689655172414) internal successors, (424), 290 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 424 transitions. [2022-11-03 04:10:24,282 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 424 transitions. Word has length 266 [2022-11-03 04:10:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:24,282 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 424 transitions. [2022-11-03 04:10:24,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 424 transitions. [2022-11-03 04:10:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:24,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:24,285 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:24,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:24,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:24,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1191456367, now seen corresponding path program 1 times [2022-11-03 04:10:24,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:24,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603925776] [2022-11-03 04:10:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:24,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:24,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:24,503 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:24,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 04:10:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:25,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:25,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:25,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603925776] [2022-11-03 04:10:25,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603925776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:25,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:25,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:25,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523194794] [2022-11-03 04:10:25,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:25,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:25,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:25,854 INFO L87 Difference]: Start difference. First operand 291 states and 424 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:26,065 INFO L93 Difference]: Finished difference Result 1078 states and 1596 transitions. [2022-11-03 04:10:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:26,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:26,070 INFO L225 Difference]: With dead ends: 1078 [2022-11-03 04:10:26,070 INFO L226 Difference]: Without dead ends: 815 [2022-11-03 04:10:26,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:26,072 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1521 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:26,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 2303 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-03 04:10:26,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 293. [2022-11-03 04:10:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.4589041095890412) internal successors, (426), 292 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 426 transitions. [2022-11-03 04:10:26,085 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 426 transitions. Word has length 266 [2022-11-03 04:10:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:26,085 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 426 transitions. [2022-11-03 04:10:26,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 426 transitions. [2022-11-03 04:10:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:26,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:26,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:26,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:26,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:26,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:26,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1807056015, now seen corresponding path program 1 times [2022-11-03 04:10:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:26,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260292863] [2022-11-03 04:10:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:26,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:26,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:26,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:10:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:27,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:27,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:27,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:27,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260292863] [2022-11-03 04:10:27,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260292863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:27,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:27,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576062252] [2022-11-03 04:10:27,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:27,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:27,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:27,509 INFO L87 Difference]: Start difference. First operand 293 states and 426 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:27,725 INFO L93 Difference]: Finished difference Result 1078 states and 1595 transitions. [2022-11-03 04:10:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:27,730 INFO L225 Difference]: With dead ends: 1078 [2022-11-03 04:10:27,730 INFO L226 Difference]: Without dead ends: 815 [2022-11-03 04:10:27,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:27,732 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 1514 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:27,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1514 Valid, 2299 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-03 04:10:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 295. [2022-11-03 04:10:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.4557823129251701) internal successors, (428), 294 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 428 transitions. [2022-11-03 04:10:27,744 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 428 transitions. Word has length 266 [2022-11-03 04:10:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:27,744 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 428 transitions. [2022-11-03 04:10:27,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 428 transitions. [2022-11-03 04:10:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:27,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:27,747 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:27,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:27,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1371943155, now seen corresponding path program 1 times [2022-11-03 04:10:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:27,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094850967] [2022-11-03 04:10:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:27,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:27,966 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:27,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:10:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:29,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:29,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:29,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094850967] [2022-11-03 04:10:29,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094850967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:29,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:29,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:29,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013365613] [2022-11-03 04:10:29,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:29,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:29,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:29,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:29,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:29,221 INFO L87 Difference]: Start difference. First operand 295 states and 428 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:29,435 INFO L93 Difference]: Finished difference Result 1078 states and 1594 transitions. [2022-11-03 04:10:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:29,441 INFO L225 Difference]: With dead ends: 1078 [2022-11-03 04:10:29,441 INFO L226 Difference]: Without dead ends: 815 [2022-11-03 04:10:29,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:29,443 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1507 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:29,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 2295 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-03 04:10:29,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 297. [2022-11-03 04:10:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.4527027027027026) internal successors, (430), 296 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 430 transitions. [2022-11-03 04:10:29,456 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 430 transitions. Word has length 266 [2022-11-03 04:10:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:29,456 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 430 transitions. [2022-11-03 04:10:29,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 430 transitions. [2022-11-03 04:10:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:29,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:29,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:29,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:29,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:29,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1710446325, now seen corresponding path program 1 times [2022-11-03 04:10:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:29,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780404853] [2022-11-03 04:10:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:29,694 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:29,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 04:10:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:30,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:30,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780404853] [2022-11-03 04:10:30,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780404853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:30,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:30,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:30,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633408354] [2022-11-03 04:10:30,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:30,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:30,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:30,856 INFO L87 Difference]: Start difference. First operand 297 states and 430 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:31,067 INFO L93 Difference]: Finished difference Result 1078 states and 1593 transitions. [2022-11-03 04:10:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:31,072 INFO L225 Difference]: With dead ends: 1078 [2022-11-03 04:10:31,072 INFO L226 Difference]: Without dead ends: 815 [2022-11-03 04:10:31,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:31,074 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1500 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1500 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:31,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1500 Valid, 2291 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-03 04:10:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 299. [2022-11-03 04:10:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.4496644295302012) internal successors, (432), 298 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 432 transitions. [2022-11-03 04:10:31,087 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 432 transitions. Word has length 266 [2022-11-03 04:10:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:31,088 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 432 transitions. [2022-11-03 04:10:31,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 432 transitions. [2022-11-03 04:10:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:31,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:31,091 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:31,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:31,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:31,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:31,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1742083447, now seen corresponding path program 1 times [2022-11-03 04:10:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:31,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140223978] [2022-11-03 04:10:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:31,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:31,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:10:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:32,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:32,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:32,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140223978] [2022-11-03 04:10:32,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140223978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:32,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:32,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:32,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146461044] [2022-11-03 04:10:32,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:32,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:32,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:32,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:32,523 INFO L87 Difference]: Start difference. First operand 299 states and 432 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:32,878 INFO L93 Difference]: Finished difference Result 1090 states and 1610 transitions. [2022-11-03 04:10:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:32,882 INFO L225 Difference]: With dead ends: 1090 [2022-11-03 04:10:32,883 INFO L226 Difference]: Without dead ends: 827 [2022-11-03 04:10:32,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:32,885 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1883 mSDsluCounter, 2555 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 2975 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:32,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1883 Valid, 2975 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:10:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-11-03 04:10:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 305. [2022-11-03 04:10:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.4473684210526316) internal successors, (440), 304 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 440 transitions. [2022-11-03 04:10:32,897 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 440 transitions. Word has length 266 [2022-11-03 04:10:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:32,898 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 440 transitions. [2022-11-03 04:10:32,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 440 transitions. [2022-11-03 04:10:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:32,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:32,902 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:32,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:33,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:33,130 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1078091129, now seen corresponding path program 1 times [2022-11-03 04:10:33,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:33,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716577171] [2022-11-03 04:10:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:33,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:33,133 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:33,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:10:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:34,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:34,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:34,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:34,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716577171] [2022-11-03 04:10:34,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716577171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:34,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:34,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971867211] [2022-11-03 04:10:34,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:34,262 INFO L87 Difference]: Start difference. First operand 305 states and 440 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:34,545 INFO L93 Difference]: Finished difference Result 1060 states and 1564 transitions. [2022-11-03 04:10:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:34,550 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:34,550 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:34,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:34,552 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1816 mSDsluCounter, 2529 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:34,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1816 Valid, 2955 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 307. [2022-11-03 04:10:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4444444444444444) internal successors, (442), 306 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 442 transitions. [2022-11-03 04:10:34,565 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 442 transitions. Word has length 266 [2022-11-03 04:10:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:34,565 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 442 transitions. [2022-11-03 04:10:34,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 442 transitions. [2022-11-03 04:10:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:34,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:34,568 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:34,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:34,791 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -272318981, now seen corresponding path program 1 times [2022-11-03 04:10:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:34,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913044199] [2022-11-03 04:10:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:34,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:34,795 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:34,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:10:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:10:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:36,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:36,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:36,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913044199] [2022-11-03 04:10:36,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913044199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:36,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:36,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:36,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761291211] [2022-11-03 04:10:36,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:36,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:36,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:36,009 INFO L87 Difference]: Start difference. First operand 307 states and 442 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:37,054 INFO L93 Difference]: Finished difference Result 1060 states and 1563 transitions. [2022-11-03 04:10:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:37,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:37,059 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:37,059 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:37,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:37,071 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1805 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:37,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 2582 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:10:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 309. [2022-11-03 04:10:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.4415584415584415) internal successors, (444), 308 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 444 transitions. [2022-11-03 04:10:37,084 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 444 transitions. Word has length 266 [2022-11-03 04:10:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:37,084 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 444 transitions. [2022-11-03 04:10:37,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 444 transitions. [2022-11-03 04:10:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:37,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:37,087 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:37,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:37,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:37,301 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:37,301 INFO L85 PathProgramCache]: Analyzing trace with hash 503928573, now seen corresponding path program 1 times [2022-11-03 04:10:37,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:37,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162881216] [2022-11-03 04:10:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:37,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:37,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:37,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:10:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:38,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:38,457 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:38,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162881216] [2022-11-03 04:10:38,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162881216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:38,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:38,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:38,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044709512] [2022-11-03 04:10:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:38,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:38,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:38,460 INFO L87 Difference]: Start difference. First operand 309 states and 444 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:38,789 INFO L93 Difference]: Finished difference Result 1060 states and 1562 transitions. [2022-11-03 04:10:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:38,794 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:38,794 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:38,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:38,797 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1802 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:38,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1802 Valid, 2913 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 311. [2022-11-03 04:10:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.4387096774193548) internal successors, (446), 310 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 446 transitions. [2022-11-03 04:10:38,811 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 446 transitions. Word has length 266 [2022-11-03 04:10:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:38,811 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 446 transitions. [2022-11-03 04:10:38,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 446 transitions. [2022-11-03 04:10:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:38,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:38,814 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:38,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:39,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:39,039 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1354479489, now seen corresponding path program 1 times [2022-11-03 04:10:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213919379] [2022-11-03 04:10:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:39,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:39,043 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:39,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 04:10:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:10:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:40,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:40,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213919379] [2022-11-03 04:10:40,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213919379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:40,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:40,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:40,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386889197] [2022-11-03 04:10:40,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:40,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:40,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:40,234 INFO L87 Difference]: Start difference. First operand 311 states and 446 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:40,521 INFO L93 Difference]: Finished difference Result 1078 states and 1588 transitions. [2022-11-03 04:10:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:40,526 INFO L225 Difference]: With dead ends: 1078 [2022-11-03 04:10:40,526 INFO L226 Difference]: Without dead ends: 815 [2022-11-03 04:10:40,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:40,528 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1450 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:40,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1450 Valid, 2233 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-03 04:10:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 315. [2022-11-03 04:10:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.4363057324840764) internal successors, (451), 314 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 451 transitions. [2022-11-03 04:10:40,540 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 451 transitions. Word has length 266 [2022-11-03 04:10:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:40,541 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 451 transitions. [2022-11-03 04:10:40,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 451 transitions. [2022-11-03 04:10:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:40,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:40,543 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:40,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:40,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:40,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1356313855, now seen corresponding path program 1 times [2022-11-03 04:10:40,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:40,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172491232] [2022-11-03 04:10:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:40,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:40,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:40,761 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:40,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 04:10:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:41,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:10:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:41,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:41,992 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:41,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172491232] [2022-11-03 04:10:41,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172491232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:41,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:41,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:41,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183380219] [2022-11-03 04:10:41,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:41,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:41,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:41,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:41,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:41,995 INFO L87 Difference]: Start difference. First operand 315 states and 451 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:42,729 INFO L93 Difference]: Finished difference Result 1104 states and 1626 transitions. [2022-11-03 04:10:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:42,734 INFO L225 Difference]: With dead ends: 1104 [2022-11-03 04:10:42,734 INFO L226 Difference]: Without dead ends: 841 [2022-11-03 04:10:42,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:42,736 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 1485 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:42,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 2092 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:10:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-11-03 04:10:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 319. [2022-11-03 04:10:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.4339622641509433) internal successors, (456), 318 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 456 transitions. [2022-11-03 04:10:42,750 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 456 transitions. Word has length 266 [2022-11-03 04:10:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:42,750 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 456 transitions. [2022-11-03 04:10:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 456 transitions. [2022-11-03 04:10:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:42,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:42,753 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:42,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:42,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:42,981 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:42,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1226449277, now seen corresponding path program 1 times [2022-11-03 04:10:42,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:42,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052806608] [2022-11-03 04:10:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:42,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:42,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:42,986 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:43,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 04:10:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:10:43,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:44,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:44,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:44,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052806608] [2022-11-03 04:10:44,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052806608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:44,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:44,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48286725] [2022-11-03 04:10:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:44,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:44,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:44,202 INFO L87 Difference]: Start difference. First operand 319 states and 456 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:44,888 INFO L93 Difference]: Finished difference Result 1104 states and 1625 transitions. [2022-11-03 04:10:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:44,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:44,892 INFO L225 Difference]: With dead ends: 1104 [2022-11-03 04:10:44,893 INFO L226 Difference]: Without dead ends: 841 [2022-11-03 04:10:44,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:44,894 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 1478 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:44,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 2088 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:10:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-11-03 04:10:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 321. [2022-11-03 04:10:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.43125) internal successors, (458), 320 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 458 transitions. [2022-11-03 04:10:44,907 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 458 transitions. Word has length 266 [2022-11-03 04:10:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:44,907 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 458 transitions. [2022-11-03 04:10:44,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 458 transitions. [2022-11-03 04:10:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:44,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:44,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:44,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:45,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:45,123 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1754688133, now seen corresponding path program 1 times [2022-11-03 04:10:45,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:45,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310681080] [2022-11-03 04:10:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:45,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:45,128 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:45,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 04:10:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:10:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:46,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:46,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:46,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310681080] [2022-11-03 04:10:46,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310681080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:46,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:46,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386952088] [2022-11-03 04:10:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:46,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:46,349 INFO L87 Difference]: Start difference. First operand 321 states and 458 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:46,615 INFO L93 Difference]: Finished difference Result 1104 states and 1624 transitions. [2022-11-03 04:10:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:46,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:46,627 INFO L225 Difference]: With dead ends: 1104 [2022-11-03 04:10:46,627 INFO L226 Difference]: Without dead ends: 841 [2022-11-03 04:10:46,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:46,629 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1473 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:46,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1473 Valid, 2256 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-11-03 04:10:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 323. [2022-11-03 04:10:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.4285714285714286) internal successors, (460), 322 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 460 transitions. [2022-11-03 04:10:46,651 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 460 transitions. Word has length 266 [2022-11-03 04:10:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:46,652 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 460 transitions. [2022-11-03 04:10:46,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 460 transitions. [2022-11-03 04:10:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:46,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:46,655 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:46,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:46,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:46,879 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1033768711, now seen corresponding path program 1 times [2022-11-03 04:10:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158091313] [2022-11-03 04:10:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:46,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:46,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:46,883 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:46,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:10:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:10:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:48,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:48,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158091313] [2022-11-03 04:10:48,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158091313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:48,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:48,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847102124] [2022-11-03 04:10:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:48,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:48,165 INFO L87 Difference]: Start difference. First operand 323 states and 460 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:48,438 INFO L93 Difference]: Finished difference Result 1112 states and 1635 transitions. [2022-11-03 04:10:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:48,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:48,447 INFO L225 Difference]: With dead ends: 1112 [2022-11-03 04:10:48,448 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 04:10:48,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:48,449 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1471 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:48,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 2257 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 04:10:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 329. [2022-11-03 04:10:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.4268292682926829) internal successors, (468), 328 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 468 transitions. [2022-11-03 04:10:48,462 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 468 transitions. Word has length 266 [2022-11-03 04:10:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:48,462 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 468 transitions. [2022-11-03 04:10:48,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 468 transitions. [2022-11-03 04:10:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:48,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:48,465 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:48,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 04:10:48,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:48,683 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -934036215, now seen corresponding path program 1 times [2022-11-03 04:10:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:48,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932165493] [2022-11-03 04:10:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:48,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:48,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:48,686 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:48,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:10:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:10:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:49,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:49,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932165493] [2022-11-03 04:10:49,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932165493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:49,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:49,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047479839] [2022-11-03 04:10:49,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:49,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:49,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:49,781 INFO L87 Difference]: Start difference. First operand 329 states and 468 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:49,885 INFO L93 Difference]: Finished difference Result 1051 states and 1545 transitions. [2022-11-03 04:10:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:49,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:49,888 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 04:10:49,888 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 04:10:49,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:49,889 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 980 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:49,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1521 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 04:10:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 333. [2022-11-03 04:10:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.4246987951807228) internal successors, (473), 332 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 473 transitions. [2022-11-03 04:10:49,902 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 473 transitions. Word has length 266 [2022-11-03 04:10:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:49,902 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 473 transitions. [2022-11-03 04:10:49,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 473 transitions. [2022-11-03 04:10:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:49,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:49,905 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:49,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 04:10:50,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:50,119 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1636088843, now seen corresponding path program 1 times [2022-11-03 04:10:50,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:50,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040347337] [2022-11-03 04:10:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:50,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:50,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:50,124 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:50,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 04:10:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:10:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:51,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:51,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:51,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040347337] [2022-11-03 04:10:51,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040347337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:51,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:51,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320566851] [2022-11-03 04:10:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:51,413 INFO L87 Difference]: Start difference. First operand 333 states and 473 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:51,687 INFO L93 Difference]: Finished difference Result 1120 states and 1645 transitions. [2022-11-03 04:10:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:51,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:51,690 INFO L225 Difference]: With dead ends: 1120 [2022-11-03 04:10:51,690 INFO L226 Difference]: Without dead ends: 857 [2022-11-03 04:10:51,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:51,692 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 1460 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:51,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 2253 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-03 04:10:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 337. [2022-11-03 04:10:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4226190476190477) internal successors, (478), 336 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2022-11-03 04:10:51,704 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 266 [2022-11-03 04:10:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:51,705 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2022-11-03 04:10:51,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2022-11-03 04:10:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:51,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:51,707 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:51,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-03 04:10:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:51,931 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash -444494835, now seen corresponding path program 1 times [2022-11-03 04:10:51,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:51,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026786389] [2022-11-03 04:10:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:51,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:51,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:51,937 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:51,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:10:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:10:52,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:53,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:53,524 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026786389] [2022-11-03 04:10:53,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026786389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:53,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:53,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849597289] [2022-11-03 04:10:53,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:53,527 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:53,783 INFO L93 Difference]: Finished difference Result 1051 states and 1543 transitions. [2022-11-03 04:10:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:53,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:53,786 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 04:10:53,786 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 04:10:53,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:53,787 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 962 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:53,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1503 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 04:10:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 339. [2022-11-03 04:10:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.4201183431952662) internal successors, (480), 338 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 480 transitions. [2022-11-03 04:10:53,798 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 480 transitions. Word has length 266 [2022-11-03 04:10:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:53,799 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 480 transitions. [2022-11-03 04:10:53,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 480 transitions. [2022-11-03 04:10:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:53,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:53,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:53,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:54,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:54,029 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2065069199, now seen corresponding path program 1 times [2022-11-03 04:10:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:54,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752738022] [2022-11-03 04:10:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:54,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:54,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:54,033 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:54,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 04:10:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:10:55,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:55,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:55,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:55,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752738022] [2022-11-03 04:10:55,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752738022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:55,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:55,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:55,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3203983] [2022-11-03 04:10:55,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:55,259 INFO L87 Difference]: Start difference. First operand 339 states and 480 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:56,281 INFO L93 Difference]: Finished difference Result 1060 states and 1553 transitions. [2022-11-03 04:10:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:56,284 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:56,285 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:56,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:56,286 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1695 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:56,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1695 Valid, 2478 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:10:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 341. [2022-11-03 04:10:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4176470588235295) internal successors, (482), 340 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2022-11-03 04:10:56,297 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 266 [2022-11-03 04:10:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:56,298 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2022-11-03 04:10:56,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2022-11-03 04:10:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:56,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:56,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:56,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 04:10:56,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:56,515 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2106616431, now seen corresponding path program 1 times [2022-11-03 04:10:56,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:56,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094336687] [2022-11-03 04:10:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:56,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:56,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:56,519 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:56,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 04:10:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:10:57,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:57,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:57,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:57,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094336687] [2022-11-03 04:10:57,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094336687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:57,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:57,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:57,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639647406] [2022-11-03 04:10:57,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:57,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:57,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:57,656 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:57,942 INFO L93 Difference]: Finished difference Result 1060 states and 1552 transitions. [2022-11-03 04:10:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:57,947 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:10:57,947 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:10:57,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:10:57,948 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 1692 mSDsluCounter, 2349 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 2809 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:57,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1692 Valid, 2809 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:10:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 343. [2022-11-03 04:10:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.4152046783625731) internal successors, (484), 342 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 484 transitions. [2022-11-03 04:10:57,960 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 484 transitions. Word has length 266 [2022-11-03 04:10:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:57,960 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 484 transitions. [2022-11-03 04:10:57,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 484 transitions. [2022-11-03 04:10:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:57,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:57,963 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:57,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:58,187 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1203695853, now seen corresponding path program 1 times [2022-11-03 04:10:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:58,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153600036] [2022-11-03 04:10:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:58,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:58,191 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:58,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:10:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:59,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:10:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:59,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:59,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:59,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153600036] [2022-11-03 04:10:59,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153600036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:59,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:59,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:10:59,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204921547] [2022-11-03 04:10:59,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:59,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:59,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:59,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:59,541 INFO L87 Difference]: Start difference. First operand 343 states and 484 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:59,814 INFO L93 Difference]: Finished difference Result 1126 states and 1650 transitions. [2022-11-03 04:10:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:10:59,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:10:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:59,817 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 04:10:59,817 INFO L226 Difference]: Without dead ends: 863 [2022-11-03 04:10:59,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:10:59,819 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1443 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:59,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2241 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-03 04:10:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 345. [2022-11-03 04:10:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.4127906976744187) internal successors, (486), 344 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 486 transitions. [2022-11-03 04:10:59,830 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 486 transitions. Word has length 266 [2022-11-03 04:10:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:59,831 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 486 transitions. [2022-11-03 04:10:59,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 486 transitions. [2022-11-03 04:10:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:10:59,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:59,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:59,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:00,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:00,061 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1211694827, now seen corresponding path program 1 times [2022-11-03 04:11:00,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:00,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393121163] [2022-11-03 04:11:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:00,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:00,065 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:00,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 04:11:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:01,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:01,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:01,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393121163] [2022-11-03 04:11:01,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393121163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:01,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:01,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:01,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502787770] [2022-11-03 04:11:01,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:01,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:01,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:01,714 INFO L87 Difference]: Start difference. First operand 345 states and 486 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:02,008 INFO L93 Difference]: Finished difference Result 1126 states and 1649 transitions. [2022-11-03 04:11:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:02,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:02,011 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 04:11:02,012 INFO L226 Difference]: Without dead ends: 863 [2022-11-03 04:11:02,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:02,013 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 1433 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:02,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1433 Valid, 2255 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-03 04:11:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 347. [2022-11-03 04:11:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.4104046242774566) internal successors, (488), 346 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 488 transitions. [2022-11-03 04:11:02,024 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 488 transitions. Word has length 266 [2022-11-03 04:11:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:02,025 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 488 transitions. [2022-11-03 04:11:02,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 488 transitions. [2022-11-03 04:11:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:02,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:02,027 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:02,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 04:11:02,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:02,239 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash -54162537, now seen corresponding path program 1 times [2022-11-03 04:11:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157072367] [2022-11-03 04:11:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:02,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:02,242 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:02,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 04:11:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:03,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:03,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157072367] [2022-11-03 04:11:03,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157072367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:03,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:03,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941809490] [2022-11-03 04:11:03,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:03,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:03,598 INFO L87 Difference]: Start difference. First operand 347 states and 488 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:03,960 INFO L93 Difference]: Finished difference Result 874 states and 1273 transitions. [2022-11-03 04:11:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:03,963 INFO L225 Difference]: With dead ends: 874 [2022-11-03 04:11:03,963 INFO L226 Difference]: Without dead ends: 611 [2022-11-03 04:11:03,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:03,964 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 1416 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:03,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 1984 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:11:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-03 04:11:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 349. [2022-11-03 04:11:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4080459770114941) internal successors, (490), 348 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 490 transitions. [2022-11-03 04:11:03,975 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 490 transitions. Word has length 266 [2022-11-03 04:11:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:03,975 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 490 transitions. [2022-11-03 04:11:03,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 490 transitions. [2022-11-03 04:11:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:03,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:03,978 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:04,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:04,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:04,195 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1811789675, now seen corresponding path program 1 times [2022-11-03 04:11:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166972617] [2022-11-03 04:11:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:04,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:04,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:04,199 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:04,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 04:11:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:05,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:11:05,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:05,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:05,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:05,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166972617] [2022-11-03 04:11:05,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166972617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:05,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:05,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:05,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267377613] [2022-11-03 04:11:05,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:05,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:05,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:05,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:05,416 INFO L87 Difference]: Start difference. First operand 349 states and 490 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:06,436 INFO L93 Difference]: Finished difference Result 1060 states and 1548 transitions. [2022-11-03 04:11:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:06,441 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:11:06,441 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:11:06,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:06,442 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 1655 mSDsluCounter, 2042 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:06,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1655 Valid, 2444 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:11:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:11:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 351. [2022-11-03 04:11:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.4057142857142857) internal successors, (492), 350 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 492 transitions. [2022-11-03 04:11:06,463 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 492 transitions. Word has length 266 [2022-11-03 04:11:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:06,464 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 492 transitions. [2022-11-03 04:11:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 492 transitions. [2022-11-03 04:11:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:06,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:06,466 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:06,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:06,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:06,683 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1667130391, now seen corresponding path program 1 times [2022-11-03 04:11:06,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:06,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444290110] [2022-11-03 04:11:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:06,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:06,686 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:06,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 04:11:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:11:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:07,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:07,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444290110] [2022-11-03 04:11:07,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444290110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:07,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:07,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:07,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355738751] [2022-11-03 04:11:07,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:07,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:07,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:07,842 INFO L87 Difference]: Start difference. First operand 351 states and 492 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:08,146 INFO L93 Difference]: Finished difference Result 1060 states and 1547 transitions. [2022-11-03 04:11:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:08,149 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:11:08,150 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:11:08,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:08,151 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1652 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:08,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2774 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:11:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 353. [2022-11-03 04:11:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.4034090909090908) internal successors, (494), 352 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 494 transitions. [2022-11-03 04:11:08,170 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 494 transitions. Word has length 266 [2022-11-03 04:11:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:08,171 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 494 transitions. [2022-11-03 04:11:08,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 494 transitions. [2022-11-03 04:11:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:08,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:08,184 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:08,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:08,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:08,384 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1028687847, now seen corresponding path program 1 times [2022-11-03 04:11:08,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:08,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133788435] [2022-11-03 04:11:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:08,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:08,388 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:08,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 04:11:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:09,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:09,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133788435] [2022-11-03 04:11:09,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133788435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:09,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:09,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:09,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341575144] [2022-11-03 04:11:09,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:09,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:09,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:09,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:09,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:09,723 INFO L87 Difference]: Start difference. First operand 353 states and 494 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:09,999 INFO L93 Difference]: Finished difference Result 1134 states and 1657 transitions. [2022-11-03 04:11:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:10,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:10,003 INFO L225 Difference]: With dead ends: 1134 [2022-11-03 04:11:10,003 INFO L226 Difference]: Without dead ends: 871 [2022-11-03 04:11:10,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:10,005 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1424 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:10,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 2232 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-11-03 04:11:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 355. [2022-11-03 04:11:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.4011299435028248) internal successors, (496), 354 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 496 transitions. [2022-11-03 04:11:10,016 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 496 transitions. Word has length 266 [2022-11-03 04:11:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:10,017 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 496 transitions. [2022-11-03 04:11:10,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 496 transitions. [2022-11-03 04:11:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:10,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:10,019 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:10,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 04:11:10,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:10,223 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1009146725, now seen corresponding path program 1 times [2022-11-03 04:11:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:10,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149476174] [2022-11-03 04:11:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:10,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:10,226 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:10,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 04:11:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:11,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:11,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:11,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149476174] [2022-11-03 04:11:11,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149476174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:11,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:11,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328779168] [2022-11-03 04:11:11,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:11,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:11,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:11,808 INFO L87 Difference]: Start difference. First operand 355 states and 496 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:12,055 INFO L93 Difference]: Finished difference Result 1051 states and 1534 transitions. [2022-11-03 04:11:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:12,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:12,059 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 04:11:12,059 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 04:11:12,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:12,061 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 908 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:12,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1494 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 04:11:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 357. [2022-11-03 04:11:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.398876404494382) internal successors, (498), 356 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 498 transitions. [2022-11-03 04:11:12,072 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 498 transitions. Word has length 266 [2022-11-03 04:11:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:12,072 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 498 transitions. [2022-11-03 04:11:12,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 498 transitions. [2022-11-03 04:11:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:12,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:12,075 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:12,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:12,291 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -481752675, now seen corresponding path program 1 times [2022-11-03 04:11:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:12,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760263748] [2022-11-03 04:11:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:12,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:12,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:12,295 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:12,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 04:11:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:11:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:13,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:13,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:13,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760263748] [2022-11-03 04:11:13,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760263748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:13,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:13,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:13,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713389540] [2022-11-03 04:11:13,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:13,461 INFO L87 Difference]: Start difference. First operand 357 states and 498 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:13,756 INFO L93 Difference]: Finished difference Result 1060 states and 1544 transitions. [2022-11-03 04:11:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:13,758 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 04:11:13,758 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 04:11:13,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:13,759 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 1628 mSDsluCounter, 2277 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:13,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 2753 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 04:11:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 359. [2022-11-03 04:11:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3966480446927374) internal successors, (500), 358 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 500 transitions. [2022-11-03 04:11:13,769 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 500 transitions. Word has length 266 [2022-11-03 04:11:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:13,769 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 500 transitions. [2022-11-03 04:11:13,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 500 transitions. [2022-11-03 04:11:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:13,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:13,772 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:13,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:13,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:13,988 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 166840095, now seen corresponding path program 1 times [2022-11-03 04:11:13,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:13,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475838548] [2022-11-03 04:11:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:13,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:13,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:13,991 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:13,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 04:11:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:15,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:15,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:15,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475838548] [2022-11-03 04:11:15,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475838548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:15,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:15,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:15,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181845224] [2022-11-03 04:11:15,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:15,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:15,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:15,406 INFO L87 Difference]: Start difference. First operand 359 states and 500 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:15,666 INFO L93 Difference]: Finished difference Result 1144 states and 1669 transitions. [2022-11-03 04:11:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:15,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:15,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:15,668 INFO L225 Difference]: With dead ends: 1144 [2022-11-03 04:11:15,668 INFO L226 Difference]: Without dead ends: 881 [2022-11-03 04:11:15,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:15,669 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1423 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:15,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 2234 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-03 04:11:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 361. [2022-11-03 04:11:15,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.3944444444444444) internal successors, (502), 360 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 502 transitions. [2022-11-03 04:11:15,680 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 502 transitions. Word has length 266 [2022-11-03 04:11:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:15,681 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 502 transitions. [2022-11-03 04:11:15,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 502 transitions. [2022-11-03 04:11:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:15,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:15,683 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:15,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:15,899 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash 256900385, now seen corresponding path program 1 times [2022-11-03 04:11:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:15,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217828546] [2022-11-03 04:11:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:15,903 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:15,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 04:11:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:11:16,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:17,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:17,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217828546] [2022-11-03 04:11:17,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217828546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:17,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:17,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:11:17,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145649859] [2022-11-03 04:11:17,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:11:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:11:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:11:17,213 INFO L87 Difference]: Start difference. First operand 361 states and 502 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:18,325 INFO L93 Difference]: Finished difference Result 1714 states and 2514 transitions. [2022-11-03 04:11:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 04:11:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:18,329 INFO L225 Difference]: With dead ends: 1714 [2022-11-03 04:11:18,329 INFO L226 Difference]: Without dead ends: 1451 [2022-11-03 04:11:18,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:11:18,332 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 4124 mSDsluCounter, 5110 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4124 SdHoareTripleChecker+Valid, 5606 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:18,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4124 Valid, 5606 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:11:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-11-03 04:11:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 379. [2022-11-03 04:11:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.3968253968253967) internal successors, (528), 378 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 528 transitions. [2022-11-03 04:11:18,349 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 528 transitions. Word has length 266 [2022-11-03 04:11:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:18,350 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 528 transitions. [2022-11-03 04:11:18,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 528 transitions. [2022-11-03 04:11:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:18,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:18,352 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:18,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:18,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:18,567 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1150825565, now seen corresponding path program 1 times [2022-11-03 04:11:18,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:18,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767872165] [2022-11-03 04:11:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:18,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:18,581 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:18,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:11:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:20,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:20,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767872165] [2022-11-03 04:11:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767872165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:20,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:20,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034988925] [2022-11-03 04:11:20,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:20,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:20,281 INFO L87 Difference]: Start difference. First operand 379 states and 528 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:20,587 INFO L93 Difference]: Finished difference Result 1209 states and 1761 transitions. [2022-11-03 04:11:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:20,591 INFO L225 Difference]: With dead ends: 1209 [2022-11-03 04:11:20,591 INFO L226 Difference]: Without dead ends: 928 [2022-11-03 04:11:20,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:20,592 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1407 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:20,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2245 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:11:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-03 04:11:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 383. [2022-11-03 04:11:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.3926701570680629) internal successors, (532), 382 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 532 transitions. [2022-11-03 04:11:20,601 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 532 transitions. Word has length 266 [2022-11-03 04:11:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:20,601 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 532 transitions. [2022-11-03 04:11:20,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 532 transitions. [2022-11-03 04:11:20,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:20,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:20,603 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:20,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:20,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:20,827 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:20,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1220891301, now seen corresponding path program 1 times [2022-11-03 04:11:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:20,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863871853] [2022-11-03 04:11:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:20,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:20,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:20,830 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:20,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 04:11:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:22,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:22,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:22,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863871853] [2022-11-03 04:11:22,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863871853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:22,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:22,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:22,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604104900] [2022-11-03 04:11:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:22,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:22,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:22,230 INFO L87 Difference]: Start difference. First operand 383 states and 532 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:22,488 INFO L93 Difference]: Finished difference Result 1224 states and 1782 transitions. [2022-11-03 04:11:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:22,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:22,491 INFO L225 Difference]: With dead ends: 1224 [2022-11-03 04:11:22,491 INFO L226 Difference]: Without dead ends: 943 [2022-11-03 04:11:22,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:22,493 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 1413 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:22,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2230 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-03 04:11:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 387. [2022-11-03 04:11:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3911917098445596) internal successors, (537), 386 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 537 transitions. [2022-11-03 04:11:22,505 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 537 transitions. Word has length 266 [2022-11-03 04:11:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 537 transitions. [2022-11-03 04:11:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 537 transitions. [2022-11-03 04:11:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:22,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:22,508 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:22,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 04:11:22,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:22,727 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1670206809, now seen corresponding path program 1 times [2022-11-03 04:11:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:22,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622835377] [2022-11-03 04:11:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:22,730 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:22,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 04:11:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:11:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:24,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:24,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622835377] [2022-11-03 04:11:24,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622835377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:24,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:24,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:11:24,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265570072] [2022-11-03 04:11:24,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:24,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:11:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:11:24,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:11:24,006 INFO L87 Difference]: Start difference. First operand 387 states and 537 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:25,016 INFO L93 Difference]: Finished difference Result 1748 states and 2559 transitions. [2022-11-03 04:11:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 04:11:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:25,019 INFO L225 Difference]: With dead ends: 1748 [2022-11-03 04:11:25,019 INFO L226 Difference]: Without dead ends: 1467 [2022-11-03 04:11:25,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:11:25,021 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 4141 mSDsluCounter, 5115 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 5633 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:25,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4141 Valid, 5633 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:11:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-11-03 04:11:25,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 395. [2022-11-03 04:11:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.3908629441624365) internal successors, (548), 394 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 548 transitions. [2022-11-03 04:11:25,034 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 548 transitions. Word has length 266 [2022-11-03 04:11:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:25,034 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 548 transitions. [2022-11-03 04:11:25,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 548 transitions. [2022-11-03 04:11:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:25,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:25,037 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:25,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 04:11:25,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:25,259 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:25,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1002824919, now seen corresponding path program 1 times [2022-11-03 04:11:25,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:25,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402387492] [2022-11-03 04:11:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:25,262 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:25,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 04:11:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:26,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:26,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:26,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402387492] [2022-11-03 04:11:26,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402387492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:26,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:26,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433372549] [2022-11-03 04:11:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:26,823 INFO L87 Difference]: Start difference. First operand 395 states and 548 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:27,113 INFO L93 Difference]: Finished difference Result 1204 states and 1748 transitions. [2022-11-03 04:11:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:27,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:27,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:27,116 INFO L225 Difference]: With dead ends: 1204 [2022-11-03 04:11:27,116 INFO L226 Difference]: Without dead ends: 915 [2022-11-03 04:11:27,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:27,118 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1345 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:27,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 2208 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-03 04:11:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 399. [2022-11-03 04:11:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.3869346733668342) internal successors, (552), 398 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2022-11-03 04:11:27,130 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 266 [2022-11-03 04:11:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:27,130 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2022-11-03 04:11:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2022-11-03 04:11:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:27,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:27,133 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:27,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:27,361 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -657996757, now seen corresponding path program 1 times [2022-11-03 04:11:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:27,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013157951] [2022-11-03 04:11:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:27,364 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:27,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 04:11:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:11:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:28,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:28,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:28,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013157951] [2022-11-03 04:11:28,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013157951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:28,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:28,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:28,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716258999] [2022-11-03 04:11:28,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:28,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:28,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:28,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:28,638 INFO L87 Difference]: Start difference. First operand 399 states and 552 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:29,685 INFO L93 Difference]: Finished difference Result 1138 states and 1648 transitions. [2022-11-03 04:11:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:29,688 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 04:11:29,688 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 04:11:29,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:29,689 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 1562 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:29,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1562 Valid, 2364 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:11:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 04:11:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 401. [2022-11-03 04:11:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.385) internal successors, (554), 400 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 554 transitions. [2022-11-03 04:11:29,697 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 554 transitions. Word has length 266 [2022-11-03 04:11:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:29,697 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 554 transitions. [2022-11-03 04:11:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 554 transitions. [2022-11-03 04:11:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:29,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:29,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:29,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:29,906 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1867498925, now seen corresponding path program 1 times [2022-11-03 04:11:29,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:29,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445207564] [2022-11-03 04:11:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:29,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:29,909 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 04:11:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:30,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:11:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:31,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:31,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:31,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445207564] [2022-11-03 04:11:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445207564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:31,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:31,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106628793] [2022-11-03 04:11:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:31,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:31,117 INFO L87 Difference]: Start difference. First operand 401 states and 554 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:31,416 INFO L93 Difference]: Finished difference Result 1138 states and 1647 transitions. [2022-11-03 04:11:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:31,421 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 04:11:31,421 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 04:11:31,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:31,423 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1559 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:31,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1559 Valid, 2691 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 04:11:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 403. [2022-11-03 04:11:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.3830845771144278) internal successors, (556), 402 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) [2022-11-03 04:11:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 556 transitions. [2022-11-03 04:11:31,432 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 556 transitions. Word has length 266 [2022-11-03 04:11:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:31,433 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 556 transitions. [2022-11-03 04:11:31,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 556 transitions. [2022-11-03 04:11:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:31,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:31,435 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:31,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:31,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:31,656 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 462307247, now seen corresponding path program 1 times [2022-11-03 04:11:31,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:31,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190523402] [2022-11-03 04:11:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:31,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:31,659 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:31,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 04:11:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:32,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:32,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:33,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:33,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:33,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190523402] [2022-11-03 04:11:33,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190523402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:33,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:33,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990578227] [2022-11-03 04:11:33,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:33,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:33,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:33,095 INFO L87 Difference]: Start difference. First operand 403 states and 556 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:33,360 INFO L93 Difference]: Finished difference Result 1264 states and 1833 transitions. [2022-11-03 04:11:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:33,363 INFO L225 Difference]: With dead ends: 1264 [2022-11-03 04:11:33,363 INFO L226 Difference]: Without dead ends: 975 [2022-11-03 04:11:33,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:33,364 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1393 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:33,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2221 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-03 04:11:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 405. [2022-11-03 04:11:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.381188118811881) internal successors, (558), 404 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 558 transitions. [2022-11-03 04:11:33,376 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 558 transitions. Word has length 266 [2022-11-03 04:11:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:33,376 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 558 transitions. [2022-11-03 04:11:33,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 558 transitions. [2022-11-03 04:11:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:33,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:33,379 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:33,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:33,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:33,595 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1908888113, now seen corresponding path program 1 times [2022-11-03 04:11:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:33,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510714057] [2022-11-03 04:11:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:33,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:33,599 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:33,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 04:11:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:34,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:11:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:34,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:34,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510714057] [2022-11-03 04:11:34,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510714057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:34,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:34,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620614299] [2022-11-03 04:11:34,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:34,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:34,908 INFO L87 Difference]: Start difference. First operand 405 states and 558 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:35,977 INFO L93 Difference]: Finished difference Result 1138 states and 1645 transitions. [2022-11-03 04:11:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:35,980 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 04:11:35,980 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 04:11:35,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:35,985 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 1528 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:35,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1528 Valid, 2332 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:11:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 04:11:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 411. [2022-11-03 04:11:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.3804878048780487) internal successors, (566), 410 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 566 transitions. [2022-11-03 04:11:35,998 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 566 transitions. Word has length 266 [2022-11-03 04:11:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:35,998 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 566 transitions. [2022-11-03 04:11:35,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 566 transitions. [2022-11-03 04:11:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:36,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:36,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:36,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:36,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:36,201 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash -489099725, now seen corresponding path program 1 times [2022-11-03 04:11:36,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:36,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503987869] [2022-11-03 04:11:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:36,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:36,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:36,204 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:36,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 04:11:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:37,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:11:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:37,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:37,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:37,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503987869] [2022-11-03 04:11:37,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503987869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:37,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:37,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739355836] [2022-11-03 04:11:37,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:37,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:37,438 INFO L87 Difference]: Start difference. First operand 411 states and 566 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:37,730 INFO L93 Difference]: Finished difference Result 1138 states and 1644 transitions. [2022-11-03 04:11:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:37,732 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 04:11:37,732 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 04:11:37,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:37,734 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1525 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:37,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 2658 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 04:11:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 413. [2022-11-03 04:11:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.3786407766990292) internal successors, (568), 412 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 568 transitions. [2022-11-03 04:11:37,742 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 568 transitions. Word has length 266 [2022-11-03 04:11:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:37,742 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 568 transitions. [2022-11-03 04:11:37,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 568 transitions. [2022-11-03 04:11:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:37,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:37,744 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:37,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 04:11:37,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:37,945 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:37,945 INFO L85 PathProgramCache]: Analyzing trace with hash -62545227, now seen corresponding path program 1 times [2022-11-03 04:11:37,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:37,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126822774] [2022-11-03 04:11:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:37,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:37,948 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:37,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 04:11:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:38,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:38,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:39,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:39,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:39,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126822774] [2022-11-03 04:11:39,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126822774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:39,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:39,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:39,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310835925] [2022-11-03 04:11:39,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:39,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:39,435 INFO L87 Difference]: Start difference. First operand 413 states and 568 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:39,706 INFO L93 Difference]: Finished difference Result 1272 states and 1842 transitions. [2022-11-03 04:11:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:39,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:39,709 INFO L225 Difference]: With dead ends: 1272 [2022-11-03 04:11:39,710 INFO L226 Difference]: Without dead ends: 983 [2022-11-03 04:11:39,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:39,711 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 1378 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:39,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2214 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-03 04:11:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 415. [2022-11-03 04:11:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.3768115942028984) internal successors, (570), 414 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 570 transitions. [2022-11-03 04:11:39,723 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 570 transitions. Word has length 266 [2022-11-03 04:11:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:39,724 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 570 transitions. [2022-11-03 04:11:39,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 570 transitions. [2022-11-03 04:11:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:39,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:39,726 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:39,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:39,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:39,951 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:39,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash -218525769, now seen corresponding path program 1 times [2022-11-03 04:11:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675301539] [2022-11-03 04:11:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:39,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:39,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:39,955 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:39,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 04:11:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:40,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:41,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:41,640 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675301539] [2022-11-03 04:11:41,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675301539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:41,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:41,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143866097] [2022-11-03 04:11:41,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:41,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:41,643 INFO L87 Difference]: Start difference. First operand 415 states and 570 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:41,952 INFO L93 Difference]: Finished difference Result 1233 states and 1784 transitions. [2022-11-03 04:11:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:41,955 INFO L225 Difference]: With dead ends: 1233 [2022-11-03 04:11:41,955 INFO L226 Difference]: Without dead ends: 944 [2022-11-03 04:11:41,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:41,957 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1322 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:41,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 2196 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:11:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-03 04:11:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 417. [2022-11-03 04:11:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.375) internal successors, (572), 416 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 572 transitions. [2022-11-03 04:11:41,971 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 572 transitions. Word has length 266 [2022-11-03 04:11:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:41,971 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 572 transitions. [2022-11-03 04:11:41,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 572 transitions. [2022-11-03 04:11:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:41,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:41,974 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:42,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 04:11:42,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:42,191 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:42,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2006395591, now seen corresponding path program 1 times [2022-11-03 04:11:42,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:42,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398358561] [2022-11-03 04:11:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:42,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:42,194 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:42,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 04:11:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:43,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:11:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:43,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:43,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:43,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398358561] [2022-11-03 04:11:43,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398358561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:43,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:43,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037046924] [2022-11-03 04:11:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:43,430 INFO L87 Difference]: Start difference. First operand 417 states and 572 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:43,735 INFO L93 Difference]: Finished difference Result 1138 states and 1641 transitions. [2022-11-03 04:11:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:11:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:43,738 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 04:11:43,739 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 04:11:43,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:43,740 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 1501 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 2637 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:43,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 2637 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 04:11:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 419. [2022-11-03 04:11:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.3732057416267942) internal successors, (574), 418 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 574 transitions. [2022-11-03 04:11:43,754 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 574 transitions. Word has length 266 [2022-11-03 04:11:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:43,755 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 574 transitions. [2022-11-03 04:11:43,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 574 transitions. [2022-11-03 04:11:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:43,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:43,757 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:43,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:43,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:43,983 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1936747717, now seen corresponding path program 1 times [2022-11-03 04:11:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:43,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600975663] [2022-11-03 04:11:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:43,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:43,991 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:44,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 04:11:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:45,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:45,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:45,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:45,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600975663] [2022-11-03 04:11:45,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600975663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:45,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:45,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:45,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213590562] [2022-11-03 04:11:45,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:45,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:45,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:45,588 INFO L87 Difference]: Start difference. First operand 419 states and 574 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:45,863 INFO L93 Difference]: Finished difference Result 1282 states and 1854 transitions. [2022-11-03 04:11:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:45,865 INFO L225 Difference]: With dead ends: 1282 [2022-11-03 04:11:45,865 INFO L226 Difference]: Without dead ends: 993 [2022-11-03 04:11:45,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:45,867 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1375 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:45,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 2216 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-03 04:11:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 421. [2022-11-03 04:11:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.3714285714285714) internal successors, (576), 420 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 576 transitions. [2022-11-03 04:11:45,880 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 576 transitions. Word has length 266 [2022-11-03 04:11:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:45,881 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 576 transitions. [2022-11-03 04:11:45,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 576 transitions. [2022-11-03 04:11:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:45,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:45,883 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:45,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 04:11:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:46,084 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -537794115, now seen corresponding path program 1 times [2022-11-03 04:11:46,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:46,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819235489] [2022-11-03 04:11:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:46,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:46,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:46,088 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:46,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 04:11:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:11:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:47,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:47,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:47,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819235489] [2022-11-03 04:11:47,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819235489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:47,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:47,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:11:47,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557468739] [2022-11-03 04:11:47,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:11:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:11:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:11:47,452 INFO L87 Difference]: Start difference. First operand 421 states and 576 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:48,498 INFO L93 Difference]: Finished difference Result 1808 states and 2635 transitions. [2022-11-03 04:11:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 04:11:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:48,502 INFO L225 Difference]: With dead ends: 1808 [2022-11-03 04:11:48,502 INFO L226 Difference]: Without dead ends: 1519 [2022-11-03 04:11:48,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:11:48,504 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 4197 mSDsluCounter, 5148 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4197 SdHoareTripleChecker+Valid, 5768 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:48,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4197 Valid, 5768 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:11:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-11-03 04:11:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 447. [2022-11-03 04:11:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.3766816143497758) internal successors, (614), 446 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 614 transitions. [2022-11-03 04:11:48,520 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 614 transitions. Word has length 266 [2022-11-03 04:11:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:48,521 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 614 transitions. [2022-11-03 04:11:48,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 614 transitions. [2022-11-03 04:11:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:48,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:48,523 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:48,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 04:11:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:48,751 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:48,751 INFO L85 PathProgramCache]: Analyzing trace with hash -174327617, now seen corresponding path program 1 times [2022-11-03 04:11:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:48,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408872623] [2022-11-03 04:11:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:48,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:48,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:48,754 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:48,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 04:11:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:11:49,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:50,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:50,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:50,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408872623] [2022-11-03 04:11:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408872623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:50,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:50,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:11:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842501489] [2022-11-03 04:11:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:50,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:11:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:11:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:11:50,379 INFO L87 Difference]: Start difference. First operand 447 states and 614 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:52,362 INFO L93 Difference]: Finished difference Result 2040 states and 2968 transitions. [2022-11-03 04:11:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:11:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:52,365 INFO L225 Difference]: With dead ends: 2040 [2022-11-03 04:11:52,366 INFO L226 Difference]: Without dead ends: 1725 [2022-11-03 04:11:52,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:11:52,368 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 3319 mSDsluCounter, 3764 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4289 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:52,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4289 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:11:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-11-03 04:11:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 507. [2022-11-03 04:11:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.3853754940711462) internal successors, (701), 506 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 701 transitions. [2022-11-03 04:11:52,386 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 701 transitions. Word has length 266 [2022-11-03 04:11:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:52,386 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 701 transitions. [2022-11-03 04:11:52,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 701 transitions. [2022-11-03 04:11:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:52,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:52,389 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:52,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:52,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:52,614 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1122379583, now seen corresponding path program 1 times [2022-11-03 04:11:52,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:52,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212730070] [2022-11-03 04:11:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:52,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:52,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:52,618 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:52,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 04:11:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:53,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:11:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:54,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:54,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:54,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212730070] [2022-11-03 04:11:54,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212730070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:54,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:54,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:11:54,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245331656] [2022-11-03 04:11:54,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:54,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:11:54,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:54,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:11:54,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:11:54,274 INFO L87 Difference]: Start difference. First operand 507 states and 701 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:56,272 INFO L93 Difference]: Finished difference Result 2102 states and 3056 transitions. [2022-11-03 04:11:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:11:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:11:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:56,275 INFO L225 Difference]: With dead ends: 2102 [2022-11-03 04:11:56,275 INFO L226 Difference]: Without dead ends: 1727 [2022-11-03 04:11:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:11:56,277 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 3319 mSDsluCounter, 3765 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4294 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:56,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4294 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:11:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-11-03 04:11:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 509. [2022-11-03 04:11:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3838582677165354) internal successors, (703), 508 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) [2022-11-03 04:11:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 703 transitions. [2022-11-03 04:11:56,296 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 703 transitions. Word has length 266 [2022-11-03 04:11:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:56,297 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 703 transitions. [2022-11-03 04:11:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 703 transitions. [2022-11-03 04:11:56,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:11:56,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:56,299 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:56,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 04:11:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:56,519 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1556885181, now seen corresponding path program 1 times [2022-11-03 04:11:56,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:56,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306731930] [2022-11-03 04:11:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:56,524 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:56,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 04:11:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:11:57,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:58,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:58,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306731930] [2022-11-03 04:11:58,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306731930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:58,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:58,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:11:58,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434577331] [2022-11-03 04:11:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:58,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:11:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:58,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:11:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:11:58,195 INFO L87 Difference]: Start difference. First operand 509 states and 703 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:00,258 INFO L93 Difference]: Finished difference Result 2106 states and 3059 transitions. [2022-11-03 04:12:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:00,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:00,262 INFO L225 Difference]: With dead ends: 2106 [2022-11-03 04:12:00,262 INFO L226 Difference]: Without dead ends: 1729 [2022-11-03 04:12:00,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:00,264 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 3319 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4299 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:00,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4299 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-11-03 04:12:00,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 511. [2022-11-03 04:12:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.3823529411764706) internal successors, (705), 510 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 705 transitions. [2022-11-03 04:12:00,282 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 705 transitions. Word has length 266 [2022-11-03 04:12:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:00,283 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 705 transitions. [2022-11-03 04:12:00,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 705 transitions. [2022-11-03 04:12:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:00,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:00,286 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:00,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:00,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:00,511 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2031485509, now seen corresponding path program 1 times [2022-11-03 04:12:00,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:00,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341100951] [2022-11-03 04:12:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:00,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:00,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:00,516 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:00,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 04:12:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:02,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:02,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:02,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341100951] [2022-11-03 04:12:02,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341100951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:02,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:02,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:02,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300264721] [2022-11-03 04:12:02,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:02,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:02,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:02,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:02,148 INFO L87 Difference]: Start difference. First operand 511 states and 705 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:04,159 INFO L93 Difference]: Finished difference Result 2110 states and 3062 transitions. [2022-11-03 04:12:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:04,161 INFO L225 Difference]: With dead ends: 2110 [2022-11-03 04:12:04,161 INFO L226 Difference]: Without dead ends: 1731 [2022-11-03 04:12:04,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:04,163 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 3319 mSDsluCounter, 3767 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4304 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:04,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4304 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-11-03 04:12:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 513. [2022-11-03 04:12:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.380859375) internal successors, (707), 512 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 707 transitions. [2022-11-03 04:12:04,178 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 707 transitions. Word has length 266 [2022-11-03 04:12:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:04,178 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 707 transitions. [2022-11-03 04:12:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 707 transitions. [2022-11-03 04:12:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:04,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:04,180 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:04,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 04:12:04,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:04,381 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1401648185, now seen corresponding path program 1 times [2022-11-03 04:12:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:04,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202205301] [2022-11-03 04:12:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:04,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:04,385 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:04,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 04:12:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:06,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:06,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:06,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202205301] [2022-11-03 04:12:06,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202205301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:06,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:06,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137051312] [2022-11-03 04:12:06,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:06,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:06,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:06,017 INFO L87 Difference]: Start difference. First operand 513 states and 707 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:08,023 INFO L93 Difference]: Finished difference Result 2114 states and 3065 transitions. [2022-11-03 04:12:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:08,025 INFO L225 Difference]: With dead ends: 2114 [2022-11-03 04:12:08,025 INFO L226 Difference]: Without dead ends: 1733 [2022-11-03 04:12:08,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:08,026 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 3319 mSDsluCounter, 3768 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4309 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:08,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4309 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:12:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-03 04:12:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 515. [2022-11-03 04:12:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3793774319066148) internal successors, (709), 514 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 709 transitions. [2022-11-03 04:12:08,044 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 709 transitions. Word has length 266 [2022-11-03 04:12:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:08,044 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 709 transitions. [2022-11-03 04:12:08,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 709 transitions. [2022-11-03 04:12:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:08,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:08,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:08,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:08,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:08,271 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash -913601079, now seen corresponding path program 1 times [2022-11-03 04:12:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:08,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733770067] [2022-11-03 04:12:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:08,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:08,274 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:08,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 04:12:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:09,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:09,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:09,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:09,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:09,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733770067] [2022-11-03 04:12:09,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733770067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:09,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:09,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:09,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356970796] [2022-11-03 04:12:09,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:09,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:09,915 INFO L87 Difference]: Start difference. First operand 515 states and 709 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:11,908 INFO L93 Difference]: Finished difference Result 2118 states and 3068 transitions. [2022-11-03 04:12:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:11,908 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:11,911 INFO L225 Difference]: With dead ends: 2118 [2022-11-03 04:12:11,911 INFO L226 Difference]: Without dead ends: 1735 [2022-11-03 04:12:11,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:11,912 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 3319 mSDsluCounter, 3769 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4314 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:11,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4314 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:12:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2022-11-03 04:12:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 517. [2022-11-03 04:12:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.377906976744186) internal successors, (711), 516 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 711 transitions. [2022-11-03 04:12:11,924 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 711 transitions. Word has length 266 [2022-11-03 04:12:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:11,924 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 711 transitions. [2022-11-03 04:12:11,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 711 transitions. [2022-11-03 04:12:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:11,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:11,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:11,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:12,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:12,127 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2099193931, now seen corresponding path program 1 times [2022-11-03 04:12:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:12,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198216640] [2022-11-03 04:12:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:12,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:12,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:12,130 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:12,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 04:12:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:13,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:13,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:13,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198216640] [2022-11-03 04:12:13,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198216640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:13,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:13,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465661245] [2022-11-03 04:12:13,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:13,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:13,768 INFO L87 Difference]: Start difference. First operand 517 states and 711 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:15,772 INFO L93 Difference]: Finished difference Result 2124 states and 3074 transitions. [2022-11-03 04:12:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:15,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:15,775 INFO L225 Difference]: With dead ends: 2124 [2022-11-03 04:12:15,775 INFO L226 Difference]: Without dead ends: 1739 [2022-11-03 04:12:15,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:15,777 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 3323 mSDsluCounter, 3774 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4329 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:15,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4329 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-11-03 04:12:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 521. [2022-11-03 04:12:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.376923076923077) internal successors, (716), 520 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 716 transitions. [2022-11-03 04:12:15,788 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 716 transitions. Word has length 266 [2022-11-03 04:12:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:15,788 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 716 transitions. [2022-11-03 04:12:15,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 716 transitions. [2022-11-03 04:12:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:15,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:15,790 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:15,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 04:12:15,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:15,991 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash -266841139, now seen corresponding path program 1 times [2022-11-03 04:12:15,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:15,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093203355] [2022-11-03 04:12:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:15,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:15,994 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:15,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 04:12:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:16,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:17,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:17,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:17,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093203355] [2022-11-03 04:12:17,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093203355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:17,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:17,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658855814] [2022-11-03 04:12:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:17,661 INFO L87 Difference]: Start difference. First operand 521 states and 716 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:19,691 INFO L93 Difference]: Finished difference Result 2130 states and 3080 transitions. [2022-11-03 04:12:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:19,693 INFO L225 Difference]: With dead ends: 2130 [2022-11-03 04:12:19,693 INFO L226 Difference]: Without dead ends: 1741 [2022-11-03 04:12:19,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:19,694 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 3323 mSDsluCounter, 3775 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:19,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4334 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-03 04:12:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 523. [2022-11-03 04:12:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.3754789272030652) internal successors, (718), 522 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) [2022-11-03 04:12:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 718 transitions. [2022-11-03 04:12:19,703 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 718 transitions. Word has length 266 [2022-11-03 04:12:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:19,704 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 718 transitions. [2022-11-03 04:12:19,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 718 transitions. [2022-11-03 04:12:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:19,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:19,705 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:19,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:19,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:19,906 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1460303823, now seen corresponding path program 1 times [2022-11-03 04:12:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:19,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478122535] [2022-11-03 04:12:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:19,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:19,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:19,910 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:19,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 04:12:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:20,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:21,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:21,596 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478122535] [2022-11-03 04:12:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478122535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:21,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:21,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900237727] [2022-11-03 04:12:21,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:21,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:21,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:21,598 INFO L87 Difference]: Start difference. First operand 523 states and 718 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:23,617 INFO L93 Difference]: Finished difference Result 2134 states and 3083 transitions. [2022-11-03 04:12:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:23,619 INFO L225 Difference]: With dead ends: 2134 [2022-11-03 04:12:23,620 INFO L226 Difference]: Without dead ends: 1743 [2022-11-03 04:12:23,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:23,621 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 3323 mSDsluCounter, 3776 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4339 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:23,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4339 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-11-03 04:12:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 525. [2022-11-03 04:12:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.3740458015267176) internal successors, (720), 524 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 720 transitions. [2022-11-03 04:12:23,635 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 720 transitions. Word has length 266 [2022-11-03 04:12:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 720 transitions. [2022-11-03 04:12:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 720 transitions. [2022-11-03 04:12:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:23,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:23,637 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:23,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 04:12:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:23,838 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -187059119, now seen corresponding path program 1 times [2022-11-03 04:12:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735258527] [2022-11-03 04:12:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:23,842 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:23,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 04:12:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:24,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:25,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:25,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:25,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735258527] [2022-11-03 04:12:25,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735258527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:25,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:25,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:25,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116724847] [2022-11-03 04:12:25,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:25,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:25,557 INFO L87 Difference]: Start difference. First operand 525 states and 720 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:27,584 INFO L93 Difference]: Finished difference Result 2138 states and 3086 transitions. [2022-11-03 04:12:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:27,587 INFO L225 Difference]: With dead ends: 2138 [2022-11-03 04:12:27,587 INFO L226 Difference]: Without dead ends: 1745 [2022-11-03 04:12:27,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:27,588 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 3323 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4344 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:27,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4344 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-11-03 04:12:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 527. [2022-11-03 04:12:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3726235741444868) internal successors, (722), 526 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 722 transitions. [2022-11-03 04:12:27,605 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 722 transitions. Word has length 266 [2022-11-03 04:12:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:27,606 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 722 transitions. [2022-11-03 04:12:27,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 722 transitions. [2022-11-03 04:12:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:27,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:27,608 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:27,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 04:12:27,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:27,837 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1225643693, now seen corresponding path program 1 times [2022-11-03 04:12:27,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:27,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442681120] [2022-11-03 04:12:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:27,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:27,841 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:27,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 04:12:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:28,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:29,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:29,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:29,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442681120] [2022-11-03 04:12:29,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442681120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:29,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:29,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:29,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531024756] [2022-11-03 04:12:29,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:29,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:29,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:29,546 INFO L87 Difference]: Start difference. First operand 527 states and 722 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:31,563 INFO L93 Difference]: Finished difference Result 2142 states and 3089 transitions. [2022-11-03 04:12:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:31,565 INFO L225 Difference]: With dead ends: 2142 [2022-11-03 04:12:31,565 INFO L226 Difference]: Without dead ends: 1747 [2022-11-03 04:12:31,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:31,566 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 3323 mSDsluCounter, 3778 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:31,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4349 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-11-03 04:12:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 529. [2022-11-03 04:12:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.371212121212121) internal successors, (724), 528 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 724 transitions. [2022-11-03 04:12:31,579 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 724 transitions. Word has length 266 [2022-11-03 04:12:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:31,579 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 724 transitions. [2022-11-03 04:12:31,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 724 transitions. [2022-11-03 04:12:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:31,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:31,582 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:31,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 04:12:31,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:31,783 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash 927463125, now seen corresponding path program 1 times [2022-11-03 04:12:31,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:31,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915727133] [2022-11-03 04:12:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:31,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:31,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:31,786 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:31,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 04:12:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:32,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:33,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:33,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:33,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915727133] [2022-11-03 04:12:33,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915727133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:33,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:33,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370886] [2022-11-03 04:12:33,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:33,488 INFO L87 Difference]: Start difference. First operand 529 states and 724 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:35,530 INFO L93 Difference]: Finished difference Result 2146 states and 3092 transitions. [2022-11-03 04:12:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:35,532 INFO L225 Difference]: With dead ends: 2146 [2022-11-03 04:12:35,533 INFO L226 Difference]: Without dead ends: 1749 [2022-11-03 04:12:35,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:35,534 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 3323 mSDsluCounter, 3779 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4354 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:35,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4354 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-11-03 04:12:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 531. [2022-11-03 04:12:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.369811320754717) internal successors, (726), 530 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 726 transitions. [2022-11-03 04:12:35,547 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 726 transitions. Word has length 266 [2022-11-03 04:12:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:35,547 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 726 transitions. [2022-11-03 04:12:35,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 726 transitions. [2022-11-03 04:12:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:35,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:35,550 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:35,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:35,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:35,751 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1045904599, now seen corresponding path program 1 times [2022-11-03 04:12:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:35,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070270209] [2022-11-03 04:12:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:35,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:35,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:35,755 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:35,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 04:12:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:37,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:37,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:37,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070270209] [2022-11-03 04:12:37,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070270209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:37,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:37,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:37,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903552536] [2022-11-03 04:12:37,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:37,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:37,465 INFO L87 Difference]: Start difference. First operand 531 states and 726 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:39,498 INFO L93 Difference]: Finished difference Result 2150 states and 3095 transitions. [2022-11-03 04:12:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:39,498 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:39,500 INFO L225 Difference]: With dead ends: 2150 [2022-11-03 04:12:39,500 INFO L226 Difference]: Without dead ends: 1751 [2022-11-03 04:12:39,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:39,502 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 3323 mSDsluCounter, 3780 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4359 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:39,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4359 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-11-03 04:12:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 533. [2022-11-03 04:12:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.368421052631579) internal successors, (728), 532 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 728 transitions. [2022-11-03 04:12:39,517 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 728 transitions. Word has length 266 [2022-11-03 04:12:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:39,518 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 728 transitions. [2022-11-03 04:12:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 728 transitions. [2022-11-03 04:12:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:39,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:39,520 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:39,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 04:12:39,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:39,749 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash -987489447, now seen corresponding path program 1 times [2022-11-03 04:12:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:39,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639048877] [2022-11-03 04:12:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:39,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:39,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:39,753 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 04:12:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:40,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:41,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:41,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:41,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639048877] [2022-11-03 04:12:41,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639048877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:41,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:41,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:12:41,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247970236] [2022-11-03 04:12:41,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:41,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:12:41,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:12:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:12:41,478 INFO L87 Difference]: Start difference. First operand 533 states and 728 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:43,491 INFO L93 Difference]: Finished difference Result 2154 states and 3098 transitions. [2022-11-03 04:12:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:12:43,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:43,493 INFO L225 Difference]: With dead ends: 2154 [2022-11-03 04:12:43,493 INFO L226 Difference]: Without dead ends: 1753 [2022-11-03 04:12:43,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:12:43,495 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 3323 mSDsluCounter, 3781 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4364 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:43,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4364 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:12:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-11-03 04:12:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 535. [2022-11-03 04:12:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.3670411985018727) internal successors, (730), 534 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 730 transitions. [2022-11-03 04:12:43,515 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 730 transitions. Word has length 266 [2022-11-03 04:12:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:43,515 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 730 transitions. [2022-11-03 04:12:43,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 730 transitions. [2022-11-03 04:12:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:43,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:43,518 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:43,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:43,731 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2000335451, now seen corresponding path program 1 times [2022-11-03 04:12:43,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:43,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857911645] [2022-11-03 04:12:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:43,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:43,735 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:43,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 04:12:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:44,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:45,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:45,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857911645] [2022-11-03 04:12:45,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857911645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:45,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:45,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:12:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086793897] [2022-11-03 04:12:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:45,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:12:45,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:45,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:12:45,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:12:45,416 INFO L87 Difference]: Start difference. First operand 535 states and 730 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:47,869 INFO L93 Difference]: Finished difference Result 2294 states and 3304 transitions. [2022-11-03 04:12:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:12:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:47,871 INFO L225 Difference]: With dead ends: 2294 [2022-11-03 04:12:47,871 INFO L226 Difference]: Without dead ends: 1891 [2022-11-03 04:12:47,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:12:47,872 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 3740 mSDsluCounter, 5077 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5670 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:47,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5670 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:12:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-11-03 04:12:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 539. [2022-11-03 04:12:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.3661710037174721) internal successors, (735), 538 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 735 transitions. [2022-11-03 04:12:47,888 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 735 transitions. Word has length 266 [2022-11-03 04:12:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:47,889 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 735 transitions. [2022-11-03 04:12:47,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 735 transitions. [2022-11-03 04:12:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:47,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:47,891 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:47,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 04:12:48,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:48,091 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash -693560739, now seen corresponding path program 1 times [2022-11-03 04:12:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:48,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268822367] [2022-11-03 04:12:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:48,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:48,095 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:48,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 04:12:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:48,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:49,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:49,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268822367] [2022-11-03 04:12:49,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268822367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:49,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:49,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:12:49,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870080489] [2022-11-03 04:12:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:12:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:12:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:12:49,644 INFO L87 Difference]: Start difference. First operand 539 states and 735 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:51,856 INFO L93 Difference]: Finished difference Result 2306 states and 3318 transitions. [2022-11-03 04:12:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:12:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:51,857 INFO L225 Difference]: With dead ends: 2306 [2022-11-03 04:12:51,858 INFO L226 Difference]: Without dead ends: 1899 [2022-11-03 04:12:51,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:12:51,858 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 3743 mSDsluCounter, 5078 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5675 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:51,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5675 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:12:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-11-03 04:12:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 541. [2022-11-03 04:12:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.364814814814815) internal successors, (737), 540 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 737 transitions. [2022-11-03 04:12:51,869 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 737 transitions. Word has length 266 [2022-11-03 04:12:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:51,869 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 737 transitions. [2022-11-03 04:12:51,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 737 transitions. [2022-11-03 04:12:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:51,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:51,871 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:51,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 04:12:52,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:52,071 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash 657824479, now seen corresponding path program 1 times [2022-11-03 04:12:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649935356] [2022-11-03 04:12:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:52,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:52,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:52,074 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:52,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 04:12:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:53,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:53,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:53,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:53,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649935356] [2022-11-03 04:12:53,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649935356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:53,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:53,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:12:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138140807] [2022-11-03 04:12:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:12:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:12:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:12:53,761 INFO L87 Difference]: Start difference. First operand 541 states and 737 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:56,208 INFO L93 Difference]: Finished difference Result 2316 states and 3329 transitions. [2022-11-03 04:12:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:12:56,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:12:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:56,210 INFO L225 Difference]: With dead ends: 2316 [2022-11-03 04:12:56,210 INFO L226 Difference]: Without dead ends: 1907 [2022-11-03 04:12:56,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:12:56,211 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 3746 mSDsluCounter, 5079 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 5680 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:56,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 5680 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:12:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-11-03 04:12:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 543. [2022-11-03 04:12:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.363468634686347) internal successors, (739), 542 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 739 transitions. [2022-11-03 04:12:56,227 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 739 transitions. Word has length 266 [2022-11-03 04:12:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:56,228 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 739 transitions. [2022-11-03 04:12:56,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 739 transitions. [2022-11-03 04:12:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:12:56,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:56,230 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:56,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:56,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:56,453 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:56,453 INFO L85 PathProgramCache]: Analyzing trace with hash -225684511, now seen corresponding path program 1 times [2022-11-03 04:12:56,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:56,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048530562] [2022-11-03 04:12:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:56,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:56,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:56,456 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:56,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 04:12:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:57,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:12:57,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:58,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:58,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048530562] [2022-11-03 04:12:58,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048530562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:58,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:58,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:12:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127101022] [2022-11-03 04:12:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:58,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:12:58,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:12:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:12:58,191 INFO L87 Difference]: Start difference. First operand 543 states and 739 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:00,620 INFO L93 Difference]: Finished difference Result 2326 states and 3340 transitions. [2022-11-03 04:13:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:00,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:00,623 INFO L225 Difference]: With dead ends: 2326 [2022-11-03 04:13:00,623 INFO L226 Difference]: Without dead ends: 1915 [2022-11-03 04:13:00,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:00,624 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 3749 mSDsluCounter, 5080 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 5685 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:00,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3749 Valid, 5685 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:13:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2022-11-03 04:13:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 545. [2022-11-03 04:13:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.3621323529411764) internal successors, (741), 544 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 741 transitions. [2022-11-03 04:13:00,639 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 741 transitions. Word has length 266 [2022-11-03 04:13:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:00,639 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 741 transitions. [2022-11-03 04:13:00,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 741 transitions. [2022-11-03 04:13:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:00,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:00,640 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:00,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 04:13:00,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:00,841 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2128700771, now seen corresponding path program 1 times [2022-11-03 04:13:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:00,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849921872] [2022-11-03 04:13:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:00,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:00,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:00,845 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:00,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 04:13:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:02,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:02,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:02,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849921872] [2022-11-03 04:13:02,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849921872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:02,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:02,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176803063] [2022-11-03 04:13:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:02,551 INFO L87 Difference]: Start difference. First operand 545 states and 741 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:04,982 INFO L93 Difference]: Finished difference Result 2336 states and 3351 transitions. [2022-11-03 04:13:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:04,984 INFO L225 Difference]: With dead ends: 2336 [2022-11-03 04:13:04,984 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 04:13:04,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:04,986 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 3752 mSDsluCounter, 5081 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3752 SdHoareTripleChecker+Valid, 5690 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:04,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3752 Valid, 5690 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:13:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 04:13:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 547. [2022-11-03 04:13:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.3608058608058609) internal successors, (743), 546 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 743 transitions. [2022-11-03 04:13:04,998 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 743 transitions. Word has length 266 [2022-11-03 04:13:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:04,999 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 743 transitions. [2022-11-03 04:13:04,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 743 transitions. [2022-11-03 04:13:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:05,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:05,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:05,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 04:13:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:05,201 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1357967205, now seen corresponding path program 1 times [2022-11-03 04:13:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:05,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481788192] [2022-11-03 04:13:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:05,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:05,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:05,204 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:05,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 04:13:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:06,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:06,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:06,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481788192] [2022-11-03 04:13:06,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481788192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:06,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:06,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:06,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316585511] [2022-11-03 04:13:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:06,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:06,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:06,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:06,884 INFO L87 Difference]: Start difference. First operand 547 states and 743 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:09,163 INFO L93 Difference]: Finished difference Result 2346 states and 3362 transitions. [2022-11-03 04:13:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:09,165 INFO L225 Difference]: With dead ends: 2346 [2022-11-03 04:13:09,165 INFO L226 Difference]: Without dead ends: 1931 [2022-11-03 04:13:09,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:09,166 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 3755 mSDsluCounter, 5082 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 5695 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:09,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3755 Valid, 5695 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:13:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-03 04:13:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 549. [2022-11-03 04:13:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.3594890510948905) internal successors, (745), 548 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 745 transitions. [2022-11-03 04:13:09,182 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 745 transitions. Word has length 266 [2022-11-03 04:13:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:09,182 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 745 transitions. [2022-11-03 04:13:09,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 745 transitions. [2022-11-03 04:13:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:09,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:09,184 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:09,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:09,407 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash 771690983, now seen corresponding path program 1 times [2022-11-03 04:13:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657450317] [2022-11-03 04:13:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:09,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:09,410 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:09,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 04:13:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:10,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:10,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:10,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657450317] [2022-11-03 04:13:10,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657450317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:10,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:10,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:10,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774486313] [2022-11-03 04:13:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:10,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:10,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:10,883 INFO L87 Difference]: Start difference. First operand 549 states and 745 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:12,939 INFO L93 Difference]: Finished difference Result 2364 states and 3385 transitions. [2022-11-03 04:13:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:12,941 INFO L225 Difference]: With dead ends: 2364 [2022-11-03 04:13:12,941 INFO L226 Difference]: Without dead ends: 1947 [2022-11-03 04:13:12,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:12,942 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 3765 mSDsluCounter, 5087 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5710 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:12,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5710 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:13:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-03 04:13:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 553. [2022-11-03 04:13:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.358695652173913) internal successors, (750), 552 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 750 transitions. [2022-11-03 04:13:12,958 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 750 transitions. Word has length 266 [2022-11-03 04:13:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:12,959 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 750 transitions. [2022-11-03 04:13:12,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 750 transitions. [2022-11-03 04:13:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:12,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:12,961 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:12,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:13,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:13,175 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2096547177, now seen corresponding path program 1 times [2022-11-03 04:13:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:13,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498297637] [2022-11-03 04:13:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:13,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:13,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:13,178 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:13,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 04:13:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:14,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:14,640 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:14,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498297637] [2022-11-03 04:13:14,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498297637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:14,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:14,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:14,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175203418] [2022-11-03 04:13:14,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:14,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:14,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:14,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:14,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:14,641 INFO L87 Difference]: Start difference. First operand 553 states and 750 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:16,771 INFO L93 Difference]: Finished difference Result 2376 states and 3399 transitions. [2022-11-03 04:13:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:16,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:16,774 INFO L225 Difference]: With dead ends: 2376 [2022-11-03 04:13:16,774 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 04:13:16,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:16,775 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 3768 mSDsluCounter, 5088 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5715 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:16,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5715 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:13:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 04:13:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 555. [2022-11-03 04:13:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.3574007220216606) internal successors, (752), 554 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 752 transitions. [2022-11-03 04:13:16,791 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 752 transitions. Word has length 266 [2022-11-03 04:13:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:16,792 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 752 transitions. [2022-11-03 04:13:16,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 752 transitions. [2022-11-03 04:13:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:16,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:16,794 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:16,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 04:13:17,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:17,007 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1038709099, now seen corresponding path program 1 times [2022-11-03 04:13:17,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:17,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170222686] [2022-11-03 04:13:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:17,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:17,010 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:17,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 04:13:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:17,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:17,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:18,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:18,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:18,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170222686] [2022-11-03 04:13:18,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170222686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:18,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:18,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:18,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608392223] [2022-11-03 04:13:18,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:18,484 INFO L87 Difference]: Start difference. First operand 555 states and 752 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:20,577 INFO L93 Difference]: Finished difference Result 2386 states and 3410 transitions. [2022-11-03 04:13:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:20,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:20,580 INFO L225 Difference]: With dead ends: 2386 [2022-11-03 04:13:20,580 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 04:13:20,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:20,581 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 3771 mSDsluCounter, 5089 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5720 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:20,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5720 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:13:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 04:13:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 557. [2022-11-03 04:13:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.356115107913669) internal successors, (754), 556 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 754 transitions. [2022-11-03 04:13:20,600 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 754 transitions. Word has length 266 [2022-11-03 04:13:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:20,600 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 754 transitions. [2022-11-03 04:13:20,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 754 transitions. [2022-11-03 04:13:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:20,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:20,602 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:20,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-03 04:13:20,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:20,802 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1278948845, now seen corresponding path program 1 times [2022-11-03 04:13:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:20,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133948709] [2022-11-03 04:13:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:20,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:20,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:20,805 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:20,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 04:13:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:22,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:22,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:22,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133948709] [2022-11-03 04:13:22,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133948709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:22,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:22,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:22,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149263834] [2022-11-03 04:13:22,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:22,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:22,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:22,275 INFO L87 Difference]: Start difference. First operand 557 states and 754 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:24,374 INFO L93 Difference]: Finished difference Result 2396 states and 3421 transitions. [2022-11-03 04:13:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:24,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:24,377 INFO L225 Difference]: With dead ends: 2396 [2022-11-03 04:13:24,377 INFO L226 Difference]: Without dead ends: 1971 [2022-11-03 04:13:24,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:24,378 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 3774 mSDsluCounter, 5090 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5725 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:24,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5725 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:13:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-03 04:13:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 559. [2022-11-03 04:13:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.3548387096774193) internal successors, (756), 558 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 756 transitions. [2022-11-03 04:13:24,389 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 756 transitions. Word has length 266 [2022-11-03 04:13:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:24,389 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 756 transitions. [2022-11-03 04:13:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 756 transitions. [2022-11-03 04:13:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:24,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:24,390 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:24,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-03 04:13:24,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:24,591 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1306014447, now seen corresponding path program 1 times [2022-11-03 04:13:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17093483] [2022-11-03 04:13:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:24,594 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:24,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 04:13:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:26,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:26,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:26,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17093483] [2022-11-03 04:13:26,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17093483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:26,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:26,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:26,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589171839] [2022-11-03 04:13:26,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:26,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:26,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:26,098 INFO L87 Difference]: Start difference. First operand 559 states and 756 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:28,275 INFO L93 Difference]: Finished difference Result 2406 states and 3432 transitions. [2022-11-03 04:13:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:28,277 INFO L225 Difference]: With dead ends: 2406 [2022-11-03 04:13:28,277 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 04:13:28,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:28,278 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 3777 mSDsluCounter, 5091 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 5730 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:28,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 5730 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:13:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 04:13:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 561. [2022-11-03 04:13:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3535714285714286) internal successors, (758), 560 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 758 transitions. [2022-11-03 04:13:28,296 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 758 transitions. Word has length 266 [2022-11-03 04:13:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:28,296 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 758 transitions. [2022-11-03 04:13:28,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 758 transitions. [2022-11-03 04:13:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:28,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:28,298 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:28,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:28,499 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1254848399, now seen corresponding path program 1 times [2022-11-03 04:13:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:28,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205530988] [2022-11-03 04:13:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:28,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:28,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:28,502 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:28,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 04:13:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:29,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:29,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:30,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:30,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205530988] [2022-11-03 04:13:30,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205530988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:30,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:30,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:30,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187274038] [2022-11-03 04:13:30,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:30,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:30,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:30,095 INFO L87 Difference]: Start difference. First operand 561 states and 758 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:32,326 INFO L93 Difference]: Finished difference Result 2416 states and 3443 transitions. [2022-11-03 04:13:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:32,328 INFO L225 Difference]: With dead ends: 2416 [2022-11-03 04:13:32,329 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 04:13:32,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:32,330 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 3780 mSDsluCounter, 5092 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3780 SdHoareTripleChecker+Valid, 5735 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:32,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3780 Valid, 5735 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:13:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 04:13:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 563. [2022-11-03 04:13:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.3523131672597866) internal successors, (760), 562 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 760 transitions. [2022-11-03 04:13:32,349 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 760 transitions. Word has length 266 [2022-11-03 04:13:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:32,349 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 760 transitions. [2022-11-03 04:13:32,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:32,350 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 760 transitions. [2022-11-03 04:13:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:32,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:32,351 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:32,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:32,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:32,581 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1129076339, now seen corresponding path program 1 times [2022-11-03 04:13:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:32,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086588808] [2022-11-03 04:13:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:32,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:32,584 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:32,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 04:13:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:33,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:34,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:34,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:34,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086588808] [2022-11-03 04:13:34,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086588808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:34,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:34,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:34,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761908836] [2022-11-03 04:13:34,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:34,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:34,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:34,210 INFO L87 Difference]: Start difference. First operand 563 states and 760 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:36,475 INFO L93 Difference]: Finished difference Result 2426 states and 3454 transitions. [2022-11-03 04:13:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:36,480 INFO L225 Difference]: With dead ends: 2426 [2022-11-03 04:13:36,481 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 04:13:36,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:36,482 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 3783 mSDsluCounter, 5093 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3783 SdHoareTripleChecker+Valid, 5740 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:36,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3783 Valid, 5740 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:13:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 04:13:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 565. [2022-11-03 04:13:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.351063829787234) internal successors, (762), 564 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 762 transitions. [2022-11-03 04:13:36,501 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 762 transitions. Word has length 266 [2022-11-03 04:13:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:36,502 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 762 transitions. [2022-11-03 04:13:36,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 762 transitions. [2022-11-03 04:13:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:36,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:36,504 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:36,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:36,717 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 161725685, now seen corresponding path program 1 times [2022-11-03 04:13:36,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:36,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314404004] [2022-11-03 04:13:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:36,720 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:36,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 04:13:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:37,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:38,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:38,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:38,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314404004] [2022-11-03 04:13:38,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314404004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:38,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:38,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:38,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482028453] [2022-11-03 04:13:38,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:38,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:38,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:38,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:38,356 INFO L87 Difference]: Start difference. First operand 565 states and 762 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:40,643 INFO L93 Difference]: Finished difference Result 2436 states and 3465 transitions. [2022-11-03 04:13:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:40,646 INFO L225 Difference]: With dead ends: 2436 [2022-11-03 04:13:40,646 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 04:13:40,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:40,647 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 3786 mSDsluCounter, 5094 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3786 SdHoareTripleChecker+Valid, 5745 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:40,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3786 Valid, 5745 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:13:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 04:13:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 567. [2022-11-03 04:13:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3498233215547704) internal successors, (764), 566 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 764 transitions. [2022-11-03 04:13:40,660 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 764 transitions. Word has length 266 [2022-11-03 04:13:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:40,660 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 764 transitions. [2022-11-03 04:13:40,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 764 transitions. [2022-11-03 04:13:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:40,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:40,661 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:40,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 04:13:40,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:40,862 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:40,862 INFO L85 PathProgramCache]: Analyzing trace with hash -330900489, now seen corresponding path program 1 times [2022-11-03 04:13:40,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107713127] [2022-11-03 04:13:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:40,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:40,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:40,865 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:40,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 04:13:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:42,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:42,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107713127] [2022-11-03 04:13:42,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107713127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:42,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:42,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:42,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677220136] [2022-11-03 04:13:42,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:42,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:42,514 INFO L87 Difference]: Start difference. First operand 567 states and 764 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:44,748 INFO L93 Difference]: Finished difference Result 2358 states and 3358 transitions. [2022-11-03 04:13:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:44,749 INFO L225 Difference]: With dead ends: 2358 [2022-11-03 04:13:44,750 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 04:13:44,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:44,750 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 3734 mSDsluCounter, 5035 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3734 SdHoareTripleChecker+Valid, 5696 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:44,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3734 Valid, 5696 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:13:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 04:13:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 571. [2022-11-03 04:13:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.3491228070175438) internal successors, (769), 570 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 769 transitions. [2022-11-03 04:13:44,762 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 769 transitions. Word has length 266 [2022-11-03 04:13:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:44,762 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 769 transitions. [2022-11-03 04:13:44,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 769 transitions. [2022-11-03 04:13:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:44,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:44,764 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:44,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 04:13:44,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:44,967 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2017080327, now seen corresponding path program 1 times [2022-11-03 04:13:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:44,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495545864] [2022-11-03 04:13:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:44,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:44,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:44,970 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:45,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 04:13:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:45,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:46,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:46,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495545864] [2022-11-03 04:13:46,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495545864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:46,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:46,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452414872] [2022-11-03 04:13:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:46,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:46,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:46,659 INFO L87 Difference]: Start difference. First operand 571 states and 769 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:48,924 INFO L93 Difference]: Finished difference Result 2370 states and 3372 transitions. [2022-11-03 04:13:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:48,926 INFO L225 Difference]: With dead ends: 2370 [2022-11-03 04:13:48,927 INFO L226 Difference]: Without dead ends: 1931 [2022-11-03 04:13:48,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:48,927 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 3737 mSDsluCounter, 5036 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3737 SdHoareTripleChecker+Valid, 5701 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:48,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3737 Valid, 5701 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:13:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-03 04:13:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 573. [2022-11-03 04:13:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.347902097902098) internal successors, (771), 572 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 771 transitions. [2022-11-03 04:13:48,945 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 771 transitions. Word has length 266 [2022-11-03 04:13:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:48,945 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 771 transitions. [2022-11-03 04:13:48,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 771 transitions. [2022-11-03 04:13:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:48,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:48,947 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:48,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 04:13:49,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:49,148 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1860490363, now seen corresponding path program 1 times [2022-11-03 04:13:49,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:49,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716822929] [2022-11-03 04:13:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:49,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:49,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:49,151 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:49,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 04:13:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:50,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:50,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716822929] [2022-11-03 04:13:50,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716822929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:50,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:50,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446827828] [2022-11-03 04:13:50,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:50,816 INFO L87 Difference]: Start difference. First operand 573 states and 771 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:53,119 INFO L93 Difference]: Finished difference Result 2380 states and 3383 transitions. [2022-11-03 04:13:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:53,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:53,121 INFO L225 Difference]: With dead ends: 2380 [2022-11-03 04:13:53,121 INFO L226 Difference]: Without dead ends: 1939 [2022-11-03 04:13:53,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:53,122 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 3740 mSDsluCounter, 5037 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5706 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:53,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5706 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:13:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-11-03 04:13:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 575. [2022-11-03 04:13:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3466898954703832) internal successors, (773), 574 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 773 transitions. [2022-11-03 04:13:53,134 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 773 transitions. Word has length 266 [2022-11-03 04:13:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:53,134 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 773 transitions. [2022-11-03 04:13:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 773 transitions. [2022-11-03 04:13:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:53,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:53,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:53,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:53,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:53,336 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash -472902275, now seen corresponding path program 1 times [2022-11-03 04:13:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:53,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575825196] [2022-11-03 04:13:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:53,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:53,339 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:53,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 04:13:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:55,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:55,033 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575825196] [2022-11-03 04:13:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575825196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:55,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:55,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972475255] [2022-11-03 04:13:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:55,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:55,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:55,035 INFO L87 Difference]: Start difference. First operand 575 states and 773 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:57,298 INFO L93 Difference]: Finished difference Result 2390 states and 3394 transitions. [2022-11-03 04:13:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:13:57,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:13:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:57,300 INFO L225 Difference]: With dead ends: 2390 [2022-11-03 04:13:57,301 INFO L226 Difference]: Without dead ends: 1947 [2022-11-03 04:13:57,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:13:57,301 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 3743 mSDsluCounter, 5038 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5711 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:57,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5711 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:13:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-03 04:13:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 577. [2022-11-03 04:13:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.3454861111111112) internal successors, (775), 576 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 775 transitions. [2022-11-03 04:13:57,313 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 775 transitions. Word has length 266 [2022-11-03 04:13:57,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:57,314 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 775 transitions. [2022-11-03 04:13:57,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:57,314 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 775 transitions. [2022-11-03 04:13:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:13:57,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:57,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:57,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:57,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:57,523 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:57,523 INFO L85 PathProgramCache]: Analyzing trace with hash 87797503, now seen corresponding path program 1 times [2022-11-03 04:13:57,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:57,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713080389] [2022-11-03 04:13:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:57,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:57,526 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:57,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 04:13:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:13:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:59,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:59,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:59,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713080389] [2022-11-03 04:13:59,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713080389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:59,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:59,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:13:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969919112] [2022-11-03 04:13:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:59,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:13:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:13:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:13:59,187 INFO L87 Difference]: Start difference. First operand 577 states and 775 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:01,465 INFO L93 Difference]: Finished difference Result 2400 states and 3405 transitions. [2022-11-03 04:14:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:01,467 INFO L225 Difference]: With dead ends: 2400 [2022-11-03 04:14:01,467 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 04:14:01,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:01,468 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 3746 mSDsluCounter, 5039 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 5716 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:01,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 5716 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:01,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 04:14:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 579. [2022-11-03 04:14:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.3442906574394464) internal successors, (777), 578 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 777 transitions. [2022-11-03 04:14:01,491 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 777 transitions. Word has length 266 [2022-11-03 04:14:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:01,491 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 777 transitions. [2022-11-03 04:14:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 777 transitions. [2022-11-03 04:14:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:01,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:01,492 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:01,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:01,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:01,693 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1348714753, now seen corresponding path program 1 times [2022-11-03 04:14:01,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:01,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014089639] [2022-11-03 04:14:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:01,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:01,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:01,697 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:01,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 04:14:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:03,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:03,390 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:03,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014089639] [2022-11-03 04:14:03,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014089639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:03,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:03,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:03,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964978288] [2022-11-03 04:14:03,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:03,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:03,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:03,391 INFO L87 Difference]: Start difference. First operand 579 states and 777 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:05,519 INFO L93 Difference]: Finished difference Result 2410 states and 3416 transitions. [2022-11-03 04:14:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:05,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:05,521 INFO L225 Difference]: With dead ends: 2410 [2022-11-03 04:14:05,522 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 04:14:05,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:05,523 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 3749 mSDsluCounter, 5040 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 5721 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:05,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3749 Valid, 5721 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:14:05,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 04:14:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 581. [2022-11-03 04:14:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3431034482758621) internal successors, (779), 580 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 779 transitions. [2022-11-03 04:14:05,537 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 779 transitions. Word has length 266 [2022-11-03 04:14:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:05,537 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 779 transitions. [2022-11-03 04:14:05,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 779 transitions. [2022-11-03 04:14:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:05,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:05,539 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:05,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:05,743 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1559467133, now seen corresponding path program 1 times [2022-11-03 04:14:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:05,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108692044] [2022-11-03 04:14:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:05,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:05,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:05,750 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:05,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 04:14:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:07,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:07,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108692044] [2022-11-03 04:14:07,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108692044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:07,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:07,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157618841] [2022-11-03 04:14:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:07,389 INFO L87 Difference]: Start difference. First operand 581 states and 779 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:09,628 INFO L93 Difference]: Finished difference Result 2428 states and 3439 transitions. [2022-11-03 04:14:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:09,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:09,631 INFO L225 Difference]: With dead ends: 2428 [2022-11-03 04:14:09,631 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 04:14:09,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:09,632 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 3759 mSDsluCounter, 5045 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3759 SdHoareTripleChecker+Valid, 5736 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:09,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3759 Valid, 5736 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:14:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 04:14:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 585. [2022-11-03 04:14:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.3424657534246576) internal successors, (784), 584 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 784 transitions. [2022-11-03 04:14:09,649 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 784 transitions. Word has length 266 [2022-11-03 04:14:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:09,650 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 784 transitions. [2022-11-03 04:14:09,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 784 transitions. [2022-11-03 04:14:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:09,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:09,651 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:09,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:09,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:09,852 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:09,852 INFO L85 PathProgramCache]: Analyzing trace with hash 706914053, now seen corresponding path program 1 times [2022-11-03 04:14:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:09,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92392793] [2022-11-03 04:14:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:09,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:09,855 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:09,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 04:14:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:10,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:11,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:11,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92392793] [2022-11-03 04:14:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92392793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:11,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:11,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740799161] [2022-11-03 04:14:11,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:11,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:11,573 INFO L87 Difference]: Start difference. First operand 585 states and 784 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:13,837 INFO L93 Difference]: Finished difference Result 2440 states and 3453 transitions. [2022-11-03 04:14:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:13,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:13,839 INFO L225 Difference]: With dead ends: 2440 [2022-11-03 04:14:13,839 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 04:14:13,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:13,840 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 3762 mSDsluCounter, 5046 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3762 SdHoareTripleChecker+Valid, 5741 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:13,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3762 Valid, 5741 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 04:14:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 587. [2022-11-03 04:14:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.341296928327645) internal successors, (786), 586 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 786 transitions. [2022-11-03 04:14:13,853 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 786 transitions. Word has length 266 [2022-11-03 04:14:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:13,853 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 786 transitions. [2022-11-03 04:14:13,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 786 transitions. [2022-11-03 04:14:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:13,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:13,855 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:13,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:14,055 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 691395335, now seen corresponding path program 1 times [2022-11-03 04:14:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:14,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941635481] [2022-11-03 04:14:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:14,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:14,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:14,063 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:14,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 04:14:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:15,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:15,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:15,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941635481] [2022-11-03 04:14:15,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941635481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:15,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:15,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:15,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44998830] [2022-11-03 04:14:15,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:15,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:15,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:15,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:15,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:15,782 INFO L87 Difference]: Start difference. First operand 587 states and 786 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:18,033 INFO L93 Difference]: Finished difference Result 2450 states and 3464 transitions. [2022-11-03 04:14:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:18,035 INFO L225 Difference]: With dead ends: 2450 [2022-11-03 04:14:18,035 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 04:14:18,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:18,036 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 3765 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5746 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:18,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5746 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:14:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 04:14:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 589. [2022-11-03 04:14:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.3401360544217686) internal successors, (788), 588 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 788 transitions. [2022-11-03 04:14:18,051 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 788 transitions. Word has length 266 [2022-11-03 04:14:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:18,051 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 788 transitions. [2022-11-03 04:14:18,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 788 transitions. [2022-11-03 04:14:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:18,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:18,052 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:18,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:18,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:18,253 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:18,253 INFO L85 PathProgramCache]: Analyzing trace with hash 338306953, now seen corresponding path program 1 times [2022-11-03 04:14:18,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:18,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955191369] [2022-11-03 04:14:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:18,256 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:18,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 04:14:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:19,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:19,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:19,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:19,967 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:19,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955191369] [2022-11-03 04:14:19,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955191369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:19,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:19,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:19,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894125438] [2022-11-03 04:14:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:19,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:19,969 INFO L87 Difference]: Start difference. First operand 589 states and 788 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:22,261 INFO L93 Difference]: Finished difference Result 2460 states and 3475 transitions. [2022-11-03 04:14:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:22,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:22,264 INFO L225 Difference]: With dead ends: 2460 [2022-11-03 04:14:22,264 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 04:14:22,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:22,265 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 3768 mSDsluCounter, 5048 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5751 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:22,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5751 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 04:14:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 591. [2022-11-03 04:14:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3389830508474576) internal successors, (790), 590 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 790 transitions. [2022-11-03 04:14:22,278 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 790 transitions. Word has length 266 [2022-11-03 04:14:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:22,278 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 790 transitions. [2022-11-03 04:14:22,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 790 transitions. [2022-11-03 04:14:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:22,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:22,280 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:22,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:22,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:22,481 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1231793291, now seen corresponding path program 1 times [2022-11-03 04:14:22,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:22,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196447984] [2022-11-03 04:14:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:22,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:22,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:22,484 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:22,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 04:14:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:24,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:24,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:24,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196447984] [2022-11-03 04:14:24,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196447984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:24,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:24,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:24,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440598111] [2022-11-03 04:14:24,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:24,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:24,221 INFO L87 Difference]: Start difference. First operand 591 states and 790 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:26,517 INFO L93 Difference]: Finished difference Result 2470 states and 3486 transitions. [2022-11-03 04:14:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:26,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:26,519 INFO L225 Difference]: With dead ends: 2470 [2022-11-03 04:14:26,519 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 04:14:26,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:26,520 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 3771 mSDsluCounter, 5049 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5756 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:26,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5756 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 04:14:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 593. [2022-11-03 04:14:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.337837837837838) internal successors, (792), 592 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 792 transitions. [2022-11-03 04:14:26,532 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 792 transitions. Word has length 266 [2022-11-03 04:14:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:26,533 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 792 transitions. [2022-11-03 04:14:26,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 792 transitions. [2022-11-03 04:14:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:26,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:26,534 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:26,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 04:14:26,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:26,735 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 334400013, now seen corresponding path program 1 times [2022-11-03 04:14:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:26,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885809278] [2022-11-03 04:14:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:26,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:26,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:26,738 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:26,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 04:14:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:27,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:28,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:28,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885809278] [2022-11-03 04:14:28,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885809278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:28,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:28,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426332376] [2022-11-03 04:14:28,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:28,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:28,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:28,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:28,503 INFO L87 Difference]: Start difference. First operand 593 states and 792 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:30,852 INFO L93 Difference]: Finished difference Result 2480 states and 3497 transitions. [2022-11-03 04:14:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:30,855 INFO L225 Difference]: With dead ends: 2480 [2022-11-03 04:14:30,855 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 04:14:30,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:30,857 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 3774 mSDsluCounter, 5050 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:30,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5761 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 04:14:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 595. [2022-11-03 04:14:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.3367003367003367) internal successors, (794), 594 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 794 transitions. [2022-11-03 04:14:30,880 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 794 transitions. Word has length 266 [2022-11-03 04:14:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:30,881 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 794 transitions. [2022-11-03 04:14:30,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 794 transitions. [2022-11-03 04:14:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:30,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:30,882 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:30,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:31,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:31,083 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash 758046735, now seen corresponding path program 1 times [2022-11-03 04:14:31,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:31,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600864285] [2022-11-03 04:14:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:31,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:31,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:31,086 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:31,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 04:14:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:32,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:32,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600864285] [2022-11-03 04:14:32,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600864285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:32,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:32,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:32,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658152779] [2022-11-03 04:14:32,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:32,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:32,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:32,989 INFO L87 Difference]: Start difference. First operand 595 states and 794 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:35,371 INFO L93 Difference]: Finished difference Result 2490 states and 3508 transitions. [2022-11-03 04:14:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:35,373 INFO L225 Difference]: With dead ends: 2490 [2022-11-03 04:14:35,373 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 04:14:35,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:35,374 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 3777 mSDsluCounter, 5051 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 5766 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:35,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 5766 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 04:14:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 597. [2022-11-03 04:14:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.3355704697986577) internal successors, (796), 596 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 796 transitions. [2022-11-03 04:14:35,388 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 796 transitions. Word has length 266 [2022-11-03 04:14:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:35,388 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 796 transitions. [2022-11-03 04:14:35,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 796 transitions. [2022-11-03 04:14:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:35,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:35,390 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:35,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-03 04:14:35,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:35,590 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1087320431, now seen corresponding path program 1 times [2022-11-03 04:14:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:35,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606691487] [2022-11-03 04:14:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:35,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:35,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:35,594 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:35,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 04:14:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:36,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:37,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:37,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606691487] [2022-11-03 04:14:37,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606691487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:37,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:37,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:37,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374219778] [2022-11-03 04:14:37,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:37,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:37,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:37,386 INFO L87 Difference]: Start difference. First operand 597 states and 796 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:39,748 INFO L93 Difference]: Finished difference Result 2500 states and 3519 transitions. [2022-11-03 04:14:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:39,751 INFO L225 Difference]: With dead ends: 2500 [2022-11-03 04:14:39,751 INFO L226 Difference]: Without dead ends: 2035 [2022-11-03 04:14:39,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:39,752 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 3780 mSDsluCounter, 5052 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3780 SdHoareTripleChecker+Valid, 5771 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:39,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3780 Valid, 5771 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-11-03 04:14:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 599. [2022-11-03 04:14:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.334448160535117) internal successors, (798), 598 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 798 transitions. [2022-11-03 04:14:39,765 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 798 transitions. Word has length 266 [2022-11-03 04:14:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:39,766 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 798 transitions. [2022-11-03 04:14:39,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 798 transitions. [2022-11-03 04:14:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:39,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:39,767 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:39,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:39,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:39,969 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash -427788909, now seen corresponding path program 1 times [2022-11-03 04:14:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:39,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691252481] [2022-11-03 04:14:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:39,972 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:39,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 04:14:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:40,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:41,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:41,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691252481] [2022-11-03 04:14:41,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691252481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:41,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:41,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141193769] [2022-11-03 04:14:41,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:41,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:41,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:41,788 INFO L87 Difference]: Start difference. First operand 599 states and 798 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:44,099 INFO L93 Difference]: Finished difference Result 2422 states and 3412 transitions. [2022-11-03 04:14:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:44,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:44,100 INFO L225 Difference]: With dead ends: 2422 [2022-11-03 04:14:44,100 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 04:14:44,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:44,101 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 3728 mSDsluCounter, 4993 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3728 SdHoareTripleChecker+Valid, 5722 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:44,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3728 Valid, 5722 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 04:14:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 603. [2022-11-03 04:14:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.3338870431893688) internal successors, (803), 602 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 803 transitions. [2022-11-03 04:14:44,114 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 803 transitions. Word has length 266 [2022-11-03 04:14:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:44,115 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 803 transitions. [2022-11-03 04:14:44,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 803 transitions. [2022-11-03 04:14:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:44,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:44,116 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:44,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:44,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:44,317 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:44,317 INFO L85 PathProgramCache]: Analyzing trace with hash -500175467, now seen corresponding path program 1 times [2022-11-03 04:14:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:44,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026963055] [2022-11-03 04:14:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:44,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:44,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:44,320 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:44,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 04:14:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:46,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:46,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026963055] [2022-11-03 04:14:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026963055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:46,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:46,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948294077] [2022-11-03 04:14:46,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:46,075 INFO L87 Difference]: Start difference. First operand 603 states and 803 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:48,387 INFO L93 Difference]: Finished difference Result 2434 states and 3426 transitions. [2022-11-03 04:14:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:48,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:48,390 INFO L225 Difference]: With dead ends: 2434 [2022-11-03 04:14:48,390 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 04:14:48,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:48,391 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 3731 mSDsluCounter, 4994 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3731 SdHoareTripleChecker+Valid, 5727 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:48,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3731 Valid, 5727 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 04:14:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 605. [2022-11-03 04:14:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.3327814569536425) internal successors, (805), 604 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 805 transitions. [2022-11-03 04:14:48,405 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 805 transitions. Word has length 266 [2022-11-03 04:14:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:48,405 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 805 transitions. [2022-11-03 04:14:48,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 805 transitions. [2022-11-03 04:14:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:48,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:48,407 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:48,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 04:14:48,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:48,608 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash 201424407, now seen corresponding path program 1 times [2022-11-03 04:14:48,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303038434] [2022-11-03 04:14:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:48,611 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:48,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 04:14:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:49,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:50,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:50,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:50,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303038434] [2022-11-03 04:14:50,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303038434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:50,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:50,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:50,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651731054] [2022-11-03 04:14:50,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:50,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:50,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:50,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:50,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:50,431 INFO L87 Difference]: Start difference. First operand 605 states and 805 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:52,734 INFO L93 Difference]: Finished difference Result 2444 states and 3437 transitions. [2022-11-03 04:14:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:52,737 INFO L225 Difference]: With dead ends: 2444 [2022-11-03 04:14:52,737 INFO L226 Difference]: Without dead ends: 1971 [2022-11-03 04:14:52,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:52,738 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 3734 mSDsluCounter, 4995 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3734 SdHoareTripleChecker+Valid, 5732 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:52,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3734 Valid, 5732 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-03 04:14:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 607. [2022-11-03 04:14:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.3316831683168318) internal successors, (807), 606 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 807 transitions. [2022-11-03 04:14:52,761 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 807 transitions. Word has length 266 [2022-11-03 04:14:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:52,762 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 807 transitions. [2022-11-03 04:14:52,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 807 transitions. [2022-11-03 04:14:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:52,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:52,763 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:52,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:52,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:52,964 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:52,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1587627801, now seen corresponding path program 1 times [2022-11-03 04:14:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:52,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434787354] [2022-11-03 04:14:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:52,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:52,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:52,967 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:52,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 04:14:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:53,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:54,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:54,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:54,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434787354] [2022-11-03 04:14:54,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434787354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:54,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:54,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:54,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136368876] [2022-11-03 04:14:54,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:54,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:54,736 INFO L87 Difference]: Start difference. First operand 607 states and 807 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:57,048 INFO L93 Difference]: Finished difference Result 2454 states and 3448 transitions. [2022-11-03 04:14:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:14:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:14:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:57,051 INFO L225 Difference]: With dead ends: 2454 [2022-11-03 04:14:57,051 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 04:14:57,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:14:57,052 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 3737 mSDsluCounter, 4996 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3737 SdHoareTripleChecker+Valid, 5737 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:57,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3737 Valid, 5737 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:14:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 04:14:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 609. [2022-11-03 04:14:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.330592105263158) internal successors, (809), 608 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 809 transitions. [2022-11-03 04:14:57,066 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 809 transitions. Word has length 266 [2022-11-03 04:14:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:57,066 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 809 transitions. [2022-11-03 04:14:57,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 809 transitions. [2022-11-03 04:14:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:14:57,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:57,068 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:57,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 04:14:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:57,268 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -784111461, now seen corresponding path program 1 times [2022-11-03 04:14:57,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:57,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701192906] [2022-11-03 04:14:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:57,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:57,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:57,271 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:57,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 04:14:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:59,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:59,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:59,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701192906] [2022-11-03 04:14:59,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701192906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:59,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:59,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:14:59,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799376783] [2022-11-03 04:14:59,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:59,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:14:59,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:14:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:14:59,134 INFO L87 Difference]: Start difference. First operand 609 states and 809 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:01,495 INFO L93 Difference]: Finished difference Result 2464 states and 3459 transitions. [2022-11-03 04:15:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:01,498 INFO L225 Difference]: With dead ends: 2464 [2022-11-03 04:15:01,498 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 04:15:01,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:01,499 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 3740 mSDsluCounter, 4997 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5742 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:01,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5742 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:15:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 04:15:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 611. [2022-11-03 04:15:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 1.3295081967213114) internal successors, (811), 610 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 811 transitions. [2022-11-03 04:15:01,513 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 811 transitions. Word has length 266 [2022-11-03 04:15:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:01,513 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 811 transitions. [2022-11-03 04:15:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 811 transitions. [2022-11-03 04:15:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:01,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:01,515 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:01,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 04:15:01,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:01,716 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -643562851, now seen corresponding path program 1 times [2022-11-03 04:15:01,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:01,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332865280] [2022-11-03 04:15:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:01,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:01,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:01,718 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:01,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 04:15:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:02,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:03,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:03,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:03,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332865280] [2022-11-03 04:15:03,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332865280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:03,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:03,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105793055] [2022-11-03 04:15:03,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:03,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:03,539 INFO L87 Difference]: Start difference. First operand 611 states and 811 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:05,846 INFO L93 Difference]: Finished difference Result 2474 states and 3470 transitions. [2022-11-03 04:15:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:05,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:05,849 INFO L225 Difference]: With dead ends: 2474 [2022-11-03 04:15:05,849 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 04:15:05,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:05,850 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 3743 mSDsluCounter, 4998 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5747 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:05,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5747 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:15:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 04:15:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 613. [2022-11-03 04:15:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.3284313725490196) internal successors, (813), 612 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 813 transitions. [2022-11-03 04:15:05,863 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 813 transitions. Word has length 266 [2022-11-03 04:15:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:05,863 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 813 transitions. [2022-11-03 04:15:05,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 813 transitions. [2022-11-03 04:15:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:05,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:05,866 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:05,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 04:15:06,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:06,071 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:06,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:06,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1845966111, now seen corresponding path program 1 times [2022-11-03 04:15:06,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:06,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837174803] [2022-11-03 04:15:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:06,077 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:06,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 04:15:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:07,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:07,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837174803] [2022-11-03 04:15:07,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837174803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:07,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:07,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:07,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515877651] [2022-11-03 04:15:07,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:07,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:07,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:07,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:07,904 INFO L87 Difference]: Start difference. First operand 613 states and 813 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:10,231 INFO L93 Difference]: Finished difference Result 2492 states and 3493 transitions. [2022-11-03 04:15:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:10,234 INFO L225 Difference]: With dead ends: 2492 [2022-11-03 04:15:10,234 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 04:15:10,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:10,235 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 3753 mSDsluCounter, 5003 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3753 SdHoareTripleChecker+Valid, 5762 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:10,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3753 Valid, 5762 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:15:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 04:15:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 617. [2022-11-03 04:15:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.327922077922078) internal successors, (818), 616 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 818 transitions. [2022-11-03 04:15:10,248 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 818 transitions. Word has length 266 [2022-11-03 04:15:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:10,249 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 818 transitions. [2022-11-03 04:15:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 818 transitions. [2022-11-03 04:15:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:10,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:10,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:10,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 04:15:10,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:10,451 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash 157022369, now seen corresponding path program 1 times [2022-11-03 04:15:10,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106652054] [2022-11-03 04:15:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:10,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:10,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:10,454 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:10,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 04:15:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:12,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:12,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:12,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106652054] [2022-11-03 04:15:12,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106652054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:12,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:12,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:12,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28423026] [2022-11-03 04:15:12,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:12,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:12,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:12,277 INFO L87 Difference]: Start difference. First operand 617 states and 818 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:14,643 INFO L93 Difference]: Finished difference Result 2504 states and 3507 transitions. [2022-11-03 04:15:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:14,645 INFO L225 Difference]: With dead ends: 2504 [2022-11-03 04:15:14,645 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 04:15:14,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:14,647 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 3756 mSDsluCounter, 5004 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 5767 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:14,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3756 Valid, 5767 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:15:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 04:15:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 619. [2022-11-03 04:15:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 1.3268608414239482) internal successors, (820), 618 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 820 transitions. [2022-11-03 04:15:14,667 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 820 transitions. Word has length 266 [2022-11-03 04:15:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:14,668 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 820 transitions. [2022-11-03 04:15:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 820 transitions. [2022-11-03 04:15:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:14,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:14,669 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:14,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-03 04:15:14,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:14,874 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1431325533, now seen corresponding path program 1 times [2022-11-03 04:15:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:14,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550524229] [2022-11-03 04:15:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:14,879 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:14,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 04:15:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:15,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:16,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:16,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:16,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550524229] [2022-11-03 04:15:16,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550524229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:16,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:16,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473154779] [2022-11-03 04:15:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:16,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:16,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:16,746 INFO L87 Difference]: Start difference. First operand 619 states and 820 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:19,130 INFO L93 Difference]: Finished difference Result 2514 states and 3518 transitions. [2022-11-03 04:15:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:19,133 INFO L225 Difference]: With dead ends: 2514 [2022-11-03 04:15:19,133 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 04:15:19,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:19,134 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 3759 mSDsluCounter, 5005 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3759 SdHoareTripleChecker+Valid, 5772 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:19,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3759 Valid, 5772 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:15:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 04:15:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 621. [2022-11-03 04:15:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.3258064516129033) internal successors, (822), 620 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 822 transitions. [2022-11-03 04:15:19,149 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 822 transitions. Word has length 266 [2022-11-03 04:15:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:19,150 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 822 transitions. [2022-11-03 04:15:19,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 822 transitions. [2022-11-03 04:15:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:19,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:19,151 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:19,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-03 04:15:19,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:19,355 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1583778085, now seen corresponding path program 1 times [2022-11-03 04:15:19,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:19,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854542395] [2022-11-03 04:15:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:19,358 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:19,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 04:15:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:21,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:21,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854542395] [2022-11-03 04:15:21,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854542395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:21,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:21,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:21,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906589854] [2022-11-03 04:15:21,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:21,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:21,221 INFO L87 Difference]: Start difference. First operand 621 states and 822 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:23,602 INFO L93 Difference]: Finished difference Result 2524 states and 3529 transitions. [2022-11-03 04:15:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:23,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:23,605 INFO L225 Difference]: With dead ends: 2524 [2022-11-03 04:15:23,605 INFO L226 Difference]: Without dead ends: 2035 [2022-11-03 04:15:23,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:23,606 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 3762 mSDsluCounter, 5006 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3762 SdHoareTripleChecker+Valid, 5777 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:23,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3762 Valid, 5777 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:15:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-11-03 04:15:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 623. [2022-11-03 04:15:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.32475884244373) internal successors, (824), 622 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 824 transitions. [2022-11-03 04:15:23,623 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 824 transitions. Word has length 266 [2022-11-03 04:15:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:23,624 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 824 transitions. [2022-11-03 04:15:23,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 824 transitions. [2022-11-03 04:15:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:23,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:23,625 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:23,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-03 04:15:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:23,831 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash 996972071, now seen corresponding path program 1 times [2022-11-03 04:15:23,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:23,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633671148] [2022-11-03 04:15:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:23,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:23,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:23,834 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:23,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 04:15:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:24,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:25,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:25,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:25,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633671148] [2022-11-03 04:15:25,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633671148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:25,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:25,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645372762] [2022-11-03 04:15:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:25,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:25,686 INFO L87 Difference]: Start difference. First operand 623 states and 824 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:28,054 INFO L93 Difference]: Finished difference Result 2534 states and 3540 transitions. [2022-11-03 04:15:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:28,057 INFO L225 Difference]: With dead ends: 2534 [2022-11-03 04:15:28,057 INFO L226 Difference]: Without dead ends: 2043 [2022-11-03 04:15:28,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:28,058 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 3765 mSDsluCounter, 5007 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5782 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:28,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5782 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:15:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-11-03 04:15:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 625. [2022-11-03 04:15:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 1.3237179487179487) internal successors, (826), 624 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 826 transitions. [2022-11-03 04:15:28,071 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 826 transitions. Word has length 266 [2022-11-03 04:15:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:28,072 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 826 transitions. [2022-11-03 04:15:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 826 transitions. [2022-11-03 04:15:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:28,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:28,073 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:28,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 04:15:28,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:28,273 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1698036649, now seen corresponding path program 1 times [2022-11-03 04:15:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:28,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266704825] [2022-11-03 04:15:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:28,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:28,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:28,277 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:28,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 04:15:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:29,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:30,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:30,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:30,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266704825] [2022-11-03 04:15:30,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266704825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:30,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:30,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992146153] [2022-11-03 04:15:30,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:30,161 INFO L87 Difference]: Start difference. First operand 625 states and 826 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:32,563 INFO L93 Difference]: Finished difference Result 2544 states and 3551 transitions. [2022-11-03 04:15:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:32,566 INFO L225 Difference]: With dead ends: 2544 [2022-11-03 04:15:32,566 INFO L226 Difference]: Without dead ends: 2051 [2022-11-03 04:15:32,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:32,567 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 3768 mSDsluCounter, 5008 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5787 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:32,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5787 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:15:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-11-03 04:15:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 627. [2022-11-03 04:15:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 1.3226837060702876) internal successors, (828), 626 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 828 transitions. [2022-11-03 04:15:32,583 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 828 transitions. Word has length 266 [2022-11-03 04:15:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:32,583 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 828 transitions. [2022-11-03 04:15:32,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 828 transitions. [2022-11-03 04:15:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:32,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:32,585 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:32,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 04:15:32,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:32,804 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1916872277, now seen corresponding path program 1 times [2022-11-03 04:15:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87048990] [2022-11-03 04:15:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:32,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:32,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:32,807 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:32,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 04:15:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:33,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:33,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:34,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:34,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87048990] [2022-11-03 04:15:34,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87048990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:34,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:34,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:34,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163627717] [2022-11-03 04:15:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:34,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:34,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:34,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:34,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:34,692 INFO L87 Difference]: Start difference. First operand 627 states and 828 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:37,094 INFO L93 Difference]: Finished difference Result 2554 states and 3562 transitions. [2022-11-03 04:15:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:37,098 INFO L225 Difference]: With dead ends: 2554 [2022-11-03 04:15:37,098 INFO L226 Difference]: Without dead ends: 2059 [2022-11-03 04:15:37,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:37,099 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 3771 mSDsluCounter, 5009 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5792 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:37,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5792 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:15:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-11-03 04:15:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 629. [2022-11-03 04:15:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.321656050955414) internal successors, (830), 628 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 830 transitions. [2022-11-03 04:15:37,124 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 830 transitions. Word has length 266 [2022-11-03 04:15:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:37,124 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 830 transitions. [2022-11-03 04:15:37,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 830 transitions. [2022-11-03 04:15:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:37,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:37,126 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:37,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 04:15:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:37,326 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash -141864915, now seen corresponding path program 1 times [2022-11-03 04:15:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:37,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946750603] [2022-11-03 04:15:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:37,330 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:37,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 04:15:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:38,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:15:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:39,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:39,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:39,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946750603] [2022-11-03 04:15:39,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946750603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:39,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:39,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 04:15:39,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993367842] [2022-11-03 04:15:39,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:39,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 04:15:39,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:39,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 04:15:39,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:15:39,215 INFO L87 Difference]: Start difference. First operand 629 states and 830 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:41,642 INFO L93 Difference]: Finished difference Result 2564 states and 3573 transitions. [2022-11-03 04:15:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:15:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:41,644 INFO L225 Difference]: With dead ends: 2564 [2022-11-03 04:15:41,644 INFO L226 Difference]: Without dead ends: 2067 [2022-11-03 04:15:41,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:15:41,645 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 3774 mSDsluCounter, 5010 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5797 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:41,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5797 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:15:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-11-03 04:15:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 631. [2022-11-03 04:15:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.3206349206349206) internal successors, (832), 630 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 832 transitions. [2022-11-03 04:15:41,659 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 832 transitions. Word has length 266 [2022-11-03 04:15:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:41,659 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 832 transitions. [2022-11-03 04:15:41,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 832 transitions. [2022-11-03 04:15:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:41,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:41,660 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:41,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-03 04:15:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:41,861 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash -140017873, now seen corresponding path program 1 times [2022-11-03 04:15:41,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:41,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069550582] [2022-11-03 04:15:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:41,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:41,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:41,864 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:41,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 04:15:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 04:15:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:45,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:45,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069550582] [2022-11-03 04:15:45,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069550582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:45,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269411540] [2022-11-03 04:15:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:45,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:15:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:15:45,974 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:15:45,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-03 04:15:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:47,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 04:15:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:49,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:50,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269411540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:50,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272885283] [2022-11-03 04:15:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:50,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:15:50,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:15:50,637 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:15:50,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-03 04:15:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 04:15:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:52,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:54,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272885283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:54,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:15:54,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 04:15:54,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982677550] [2022-11-03 04:15:54,377 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:15:54,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 04:15:54,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:54,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 04:15:54,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:15:54,379 INFO L87 Difference]: Start difference. First operand 631 states and 832 transitions. Second operand has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:54,708 INFO L93 Difference]: Finished difference Result 905 states and 1134 transitions. [2022-11-03 04:15:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:15:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:54,711 INFO L225 Difference]: With dead ends: 905 [2022-11-03 04:15:54,711 INFO L226 Difference]: Without dead ends: 903 [2022-11-03 04:15:54,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1574 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:15:54,712 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 157 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 3793 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:54,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 3793 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-11-03 04:15:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-03 04:15:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 888. [2022-11-03 04:15:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.2514092446448704) internal successors, (1110), 887 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1110 transitions. [2022-11-03 04:15:54,744 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1110 transitions. Word has length 266 [2022-11-03 04:15:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:54,744 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1110 transitions. [2022-11-03 04:15:54,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1110 transitions. [2022-11-03 04:15:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 04:15:54,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:54,746 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:54,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-03 04:15:54,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-03 04:15:55,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-03 04:15:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:15:55,360 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1989916589, now seen corresponding path program 1 times [2022-11-03 04:15:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:55,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880740199] [2022-11-03 04:15:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:55,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:55,363 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:55,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 04:15:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:15:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:56,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:15:56,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880740199] [2022-11-03 04:15:56,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880740199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:15:56,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:15:56,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:15:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535330353] [2022-11-03 04:15:56,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:15:56,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:15:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:15:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:15:56,290 INFO L87 Difference]: Start difference. First operand 888 states and 1110 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:56,525 INFO L93 Difference]: Finished difference Result 1885 states and 2478 transitions. [2022-11-03 04:15:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:15:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-11-03 04:15:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:56,527 INFO L225 Difference]: With dead ends: 1885 [2022-11-03 04:15:56,528 INFO L226 Difference]: Without dead ends: 1262 [2022-11-03 04:15:56,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:15:56,529 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 944 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:56,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 1143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:15:56,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-11-03 04:15:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 764. [2022-11-03 04:15:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.2739187418086502) internal successors, (972), 763 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 972 transitions. [2022-11-03 04:15:56,559 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 972 transitions. Word has length 266 [2022-11-03 04:15:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:56,560 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 972 transitions. [2022-11-03 04:15:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 972 transitions. [2022-11-03 04:15:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:15:56,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:56,564 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:56,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-03 04:15:56,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:15:56,779 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash -706781831, now seen corresponding path program 1 times [2022-11-03 04:15:56,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:56,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888972380] [2022-11-03 04:15:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:56,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:56,785 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:56,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 04:15:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:15:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:15:59,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:00,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888972380] [2022-11-03 04:16:00,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888972380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [744476586] [2022-11-03 04:16:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:00,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:00,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:00,395 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:00,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-03 04:16:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:02,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:16:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:16:02,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:16:02,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [744476586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:02,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:16:02,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:16:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996486539] [2022-11-03 04:16:02,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:02,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:16:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:16:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:16:02,668 INFO L87 Difference]: Start difference. First operand 764 states and 972 transitions. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:02,842 INFO L93 Difference]: Finished difference Result 2503 states and 3286 transitions. [2022-11-03 04:16:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:16:02,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 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 527 [2022-11-03 04:16:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:02,845 INFO L225 Difference]: With dead ends: 2503 [2022-11-03 04:16:02,845 INFO L226 Difference]: Without dead ends: 2004 [2022-11-03 04:16:02,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1583 GetRequests, 1566 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:16:02,846 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 1374 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:02,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1374 Valid, 2197 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:16:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-11-03 04:16:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 766. [2022-11-03 04:16:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 1.2732026143790849) internal successors, (974), 765 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 974 transitions. [2022-11-03 04:16:02,880 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 974 transitions. Word has length 527 [2022-11-03 04:16:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:02,880 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 974 transitions. [2022-11-03 04:16:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 974 transitions. [2022-11-03 04:16:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:16:02,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:02,885 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:02,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:03,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:03,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:03,301 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:03,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1295329911, now seen corresponding path program 1 times [2022-11-03 04:16:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:03,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030085749] [2022-11-03 04:16:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:03,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:03,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:03,307 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:03,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 04:16:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:16:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:06,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:06,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:06,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030085749] [2022-11-03 04:16:06,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030085749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:06,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [178188883] [2022-11-03 04:16:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:06,865 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:06,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:06,866 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:06,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 04:16:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:09,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:16:09,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 04:16:09,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:16:09,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [178188883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:09,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:16:09,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:16:09,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200484502] [2022-11-03 04:16:09,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:09,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:16:09,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:16:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:16:09,151 INFO L87 Difference]: Start difference. First operand 766 states and 974 transitions. Second operand has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:09,310 INFO L93 Difference]: Finished difference Result 2479 states and 3258 transitions. [2022-11-03 04:16:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:16:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 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 527 [2022-11-03 04:16:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:09,313 INFO L225 Difference]: With dead ends: 2479 [2022-11-03 04:16:09,313 INFO L226 Difference]: Without dead ends: 1978 [2022-11-03 04:16:09,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1583 GetRequests, 1566 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:16:09,315 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 2240 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2240 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:09,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2240 Valid, 1484 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:16:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-11-03 04:16:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 768. [2022-11-03 04:16:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.272490221642764) internal successors, (976), 767 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 976 transitions. [2022-11-03 04:16:09,347 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 976 transitions. Word has length 527 [2022-11-03 04:16:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:09,348 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 976 transitions. [2022-11-03 04:16:09,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 976 transitions. [2022-11-03 04:16:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:16:09,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:09,353 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:09,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:09,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:09,767 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1425194489, now seen corresponding path program 1 times [2022-11-03 04:16:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557356141] [2022-11-03 04:16:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:09,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:09,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:09,771 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:09,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-03 04:16:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:11,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:16:11,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:12,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:13,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557356141] [2022-11-03 04:16:13,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557356141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [516919723] [2022-11-03 04:16:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:13,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:13,252 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:13,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-11-03 04:16:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:16:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:16:15,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:16:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [516919723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:15,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:16:15,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:16:15,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849287107] [2022-11-03 04:16:15,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:15,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:16:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:16:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:16:15,635 INFO L87 Difference]: Start difference. First operand 768 states and 976 transitions. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:15,830 INFO L93 Difference]: Finished difference Result 2533 states and 3338 transitions. [2022-11-03 04:16:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:16:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 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 527 [2022-11-03 04:16:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:15,833 INFO L225 Difference]: With dead ends: 2533 [2022-11-03 04:16:15,833 INFO L226 Difference]: Without dead ends: 2030 [2022-11-03 04:16:15,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:16:15,835 INFO L413 NwaCegarLoop]: 977 mSDtfsCounter, 1391 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:15,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 2228 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:16:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-11-03 04:16:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 834. [2022-11-03 04:16:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 1.2869147659063624) internal successors, (1072), 833 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1072 transitions. [2022-11-03 04:16:15,869 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1072 transitions. Word has length 527 [2022-11-03 04:16:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:15,870 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1072 transitions. [2022-11-03 04:16:15,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1072 transitions. [2022-11-03 04:16:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:16:15,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:15,874 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:15,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:16,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:16,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:16,291 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash -588650889, now seen corresponding path program 1 times [2022-11-03 04:16:16,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:16,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472188126] [2022-11-03 04:16:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:16,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:16,296 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:16,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-03 04:16:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:16:17,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:19,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:19,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472188126] [2022-11-03 04:16:19,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472188126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:19,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640086057] [2022-11-03 04:16:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:19,632 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:19,633 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:19,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Waiting until timeout for monitored process [2022-11-03 04:16:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:16:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:16:22,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:16:22,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640086057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:22,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:16:22,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:16:22,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71064778] [2022-11-03 04:16:22,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:22,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:16:22,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:16:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:16:22,080 INFO L87 Difference]: Start difference. First operand 834 states and 1072 transitions. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:22,270 INFO L93 Difference]: Finished difference Result 2867 states and 3837 transitions. [2022-11-03 04:16:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:16:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 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 527 [2022-11-03 04:16:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:22,273 INFO L225 Difference]: With dead ends: 2867 [2022-11-03 04:16:22,273 INFO L226 Difference]: Without dead ends: 2298 [2022-11-03 04:16:22,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:16:22,274 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 1376 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:22,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1376 Valid, 2237 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:16:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-11-03 04:16:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1012. [2022-11-03 04:16:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.3165182987141444) internal successors, (1331), 1011 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1331 transitions. [2022-11-03 04:16:22,297 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1331 transitions. Word has length 527 [2022-11-03 04:16:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:22,298 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1331 transitions. [2022-11-03 04:16:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1331 transitions. [2022-11-03 04:16:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:16:22,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:22,301 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:22,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-03 04:16:22,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:22,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:22,702 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1087207691, now seen corresponding path program 1 times [2022-11-03 04:16:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:22,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049018753] [2022-11-03 04:16:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:22,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:22,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:22,706 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:22,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-03 04:16:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:24,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:16:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:25,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:26,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:26,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049018753] [2022-11-03 04:16:26,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049018753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:26,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1212440164] [2022-11-03 04:16:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:26,087 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:26,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:26,088 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-03 04:16:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:16:28,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 04:16:28,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:16:28,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1212440164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:28,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:16:28,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:16:28,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566322551] [2022-11-03 04:16:28,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:28,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:16:28,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:16:28,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:16:28,493 INFO L87 Difference]: Start difference. First operand 1012 states and 1331 transitions. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:28,634 INFO L93 Difference]: Finished difference Result 3520 states and 4787 transitions. [2022-11-03 04:16:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:16:28,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 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 527 [2022-11-03 04:16:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:28,638 INFO L225 Difference]: With dead ends: 3520 [2022-11-03 04:16:28,638 INFO L226 Difference]: Without dead ends: 2773 [2022-11-03 04:16:28,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:16:28,639 INFO L413 NwaCegarLoop]: 1112 mSDtfsCounter, 1329 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:28,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 2583 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:16:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2022-11-03 04:16:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1144. [2022-11-03 04:16:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 1.3289588801399825) internal successors, (1519), 1143 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1519 transitions. [2022-11-03 04:16:28,664 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1519 transitions. Word has length 527 [2022-11-03 04:16:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:28,664 INFO L495 AbstractCegarLoop]: Abstraction has 1144 states and 1519 transitions. [2022-11-03 04:16:28,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1519 transitions. [2022-11-03 04:16:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:16:28,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:28,669 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:28,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:28,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Ended with exit code 0 [2022-11-03 04:16:29,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:29,070 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1473070093, now seen corresponding path program 1 times [2022-11-03 04:16:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:29,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428530914] [2022-11-03 04:16:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:29,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:29,074 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:29,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-03 04:16:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:30,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:16:30,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:31,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:32,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428530914] [2022-11-03 04:16:32,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428530914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890495333] [2022-11-03 04:16:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:32,495 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:32,496 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:32,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-11-03 04:16:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:34,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:16:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 04:16:34,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:16:34,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [890495333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:34,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:16:34,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:16:34,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400641457] [2022-11-03 04:16:34,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:34,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:16:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:16:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:16:34,855 INFO L87 Difference]: Start difference. First operand 1144 states and 1519 transitions. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:35,039 INFO L93 Difference]: Finished difference Result 4154 states and 5688 transitions. [2022-11-03 04:16:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:16:35,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 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 527 [2022-11-03 04:16:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:35,043 INFO L225 Difference]: With dead ends: 4154 [2022-11-03 04:16:35,043 INFO L226 Difference]: Without dead ends: 3275 [2022-11-03 04:16:35,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:16:35,045 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 1322 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:35,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 2584 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:16:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-11-03 04:16:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 1400. [2022-11-03 04:16:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.3459614010007148) internal successors, (1883), 1399 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1883 transitions. [2022-11-03 04:16:35,090 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1883 transitions. Word has length 527 [2022-11-03 04:16:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:35,090 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1883 transitions. [2022-11-03 04:16:35,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1883 transitions. [2022-11-03 04:16:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:16:35,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:35,095 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:35,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:35,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:16:35,509 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash 458055541, now seen corresponding path program 1 times [2022-11-03 04:16:35,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:35,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676889068] [2022-11-03 04:16:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:35,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:35,514 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:35,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-03 04:16:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:16:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:38,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:38,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:38,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676889068] [2022-11-03 04:16:38,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676889068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:38,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [727438498] [2022-11-03 04:16:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:38,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:38,937 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:38,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2022-11-03 04:16:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:16:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 197 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:42,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 212 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:16:43,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [727438498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:43,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093416256] [2022-11-03 04:16:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:43,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:16:43,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:16:43,263 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:16:43,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-03 04:16:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:44,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:16:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:16:45,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:16:47,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093416256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:47,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:16:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 28 [2022-11-03 04:16:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313180988] [2022-11-03 04:16:47,638 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:16:47,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 04:16:47,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 04:16:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-03 04:16:47,642 INFO L87 Difference]: Start difference. First operand 1400 states and 1883 transitions. Second operand has 28 states, 28 states have (on average 59.714285714285715) internal successors, (1672), 28 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:17:09,874 INFO L93 Difference]: Finished difference Result 38642 states and 53338 transitions. [2022-11-03 04:17:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-03 04:17:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 59.714285714285715) internal successors, (1672), 28 states have internal predecessors, (1672), 0 states have call successors, (0), 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 527 [2022-11-03 04:17:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:17:09,892 INFO L225 Difference]: With dead ends: 38642 [2022-11-03 04:17:09,892 INFO L226 Difference]: Without dead ends: 37507 [2022-11-03 04:17:09,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3284 GetRequests, 3130 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9093 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=4623, Invalid=19557, Unknown=0, NotChecked=0, Total=24180 [2022-11-03 04:17:09,898 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 37332 mSDsluCounter, 18392 mSDsCounter, 0 mSdLazyCounter, 5916 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37332 SdHoareTripleChecker+Valid, 19347 SdHoareTripleChecker+Invalid, 6413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 5916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:17:09,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37332 Valid, 19347 Invalid, 6413 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [497 Valid, 5916 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-03 04:17:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37507 states. [2022-11-03 04:17:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37507 to 4697. [2022-11-03 04:17:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 1.3847955706984667) internal successors, (6503), 4696 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 6503 transitions. [2022-11-03 04:17:10,110 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 6503 transitions. Word has length 527 [2022-11-03 04:17:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:17:10,111 INFO L495 AbstractCegarLoop]: Abstraction has 4697 states and 6503 transitions. [2022-11-03 04:17:10,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 59.714285714285715) internal successors, (1672), 28 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 6503 transitions. [2022-11-03 04:17:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:17:10,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:17:10,117 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:17:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2022-11-03 04:17:10,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Ended with exit code 0 [2022-11-03 04:17:10,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-11-03 04:17:10,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:17:10,718 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:17:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:17:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1220394493, now seen corresponding path program 1 times [2022-11-03 04:17:10,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:17:10,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895438279] [2022-11-03 04:17:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:17:10,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:17:10,723 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:17:10,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-03 04:17:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:12,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:17:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:17:14,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:17:22,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:17:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895438279] [2022-11-03 04:17:22,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895438279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471682864] [2022-11-03 04:17:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:22,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:22,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:17:22,243 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:17:22,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-03 04:17:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:17:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:17:24,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:17:24,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471682864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:17:24,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:17:24,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:17:24,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723694938] [2022-11-03 04:17:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:17:24,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:17:24,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:17:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:17:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:17:24,702 INFO L87 Difference]: Start difference. First operand 4697 states and 6503 transitions. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:17:24,938 INFO L93 Difference]: Finished difference Result 13984 states and 19328 transitions. [2022-11-03 04:17:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:17:24,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 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 527 [2022-11-03 04:17:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:17:24,957 INFO L225 Difference]: With dead ends: 13984 [2022-11-03 04:17:24,957 INFO L226 Difference]: Without dead ends: 10154 [2022-11-03 04:17:24,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:17:24,961 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1947 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:17:24,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 1549 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:17:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10154 states. [2022-11-03 04:17:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10154 to 4697. [2022-11-03 04:17:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 1.3826660988074957) internal successors, (6493), 4696 states have internal predecessors, (6493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 6493 transitions. [2022-11-03 04:17:25,130 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 6493 transitions. Word has length 527 [2022-11-03 04:17:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:17:25,130 INFO L495 AbstractCegarLoop]: Abstraction has 4697 states and 6493 transitions. [2022-11-03 04:17:25,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 6493 transitions. [2022-11-03 04:17:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:17:25,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:17:25,136 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:17:25,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Ended with exit code 0 [2022-11-03 04:17:25,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Ended with exit code 0 [2022-11-03 04:17:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:25,537 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:17:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:17:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash -638013569, now seen corresponding path program 1 times [2022-11-03 04:17:25,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:17:25,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560162882] [2022-11-03 04:17:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:25,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:17:25,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:17:25,543 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:17:25,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-03 04:17:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:17:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:17:29,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:17:35,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:17:35,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560162882] [2022-11-03 04:17:35,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560162882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:35,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [157941685] [2022-11-03 04:17:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:35,606 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:35,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:17:35,607 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:17:35,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-11-03 04:17:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:37,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:17:37,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:17:38,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:17:38,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [157941685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:17:38,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:17:38,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:17:38,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393026022] [2022-11-03 04:17:38,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:17:38,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:17:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:17:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:17:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:17:38,010 INFO L87 Difference]: Start difference. First operand 4697 states and 6493 transitions. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:17:38,276 INFO L93 Difference]: Finished difference Result 13969 states and 19288 transitions. [2022-11-03 04:17:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:17:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 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 527 [2022-11-03 04:17:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:17:38,284 INFO L225 Difference]: With dead ends: 13969 [2022-11-03 04:17:38,284 INFO L226 Difference]: Without dead ends: 10259 [2022-11-03 04:17:38,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:17:38,286 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 1970 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:17:38,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 1540 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:17:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10259 states. [2022-11-03 04:17:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10259 to 4697. [2022-11-03 04:17:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 1.3818143100511073) internal successors, (6489), 4696 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 6489 transitions. [2022-11-03 04:17:38,430 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 6489 transitions. Word has length 527 [2022-11-03 04:17:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:17:38,431 INFO L495 AbstractCegarLoop]: Abstraction has 4697 states and 6489 transitions. [2022-11-03 04:17:38,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 6489 transitions. [2022-11-03 04:17:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:17:38,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:17:38,440 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:17:38,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (131)] Ended with exit code 0 [2022-11-03 04:17:38,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2022-11-03 04:17:38,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:17:38,852 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:17:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:17:38,853 INFO L85 PathProgramCache]: Analyzing trace with hash 264907009, now seen corresponding path program 1 times [2022-11-03 04:17:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:17:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125010751] [2022-11-03 04:17:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:38,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:17:38,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:17:38,859 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:17:38,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-03 04:17:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:40,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:17:40,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:17:43,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:17:48,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:17:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125010751] [2022-11-03 04:17:48,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125010751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043693670] [2022-11-03 04:17:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:17:48,815 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:17:48,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2022-11-03 04:17:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:17:50,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:17:51,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:17:51,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2043693670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:17:51,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:17:51,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:17:51,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667122360] [2022-11-03 04:17:51,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:17:51,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:17:51,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:17:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:17:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:17:51,126 INFO L87 Difference]: Start difference. First operand 4697 states and 6489 transitions. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:17:51,347 INFO L93 Difference]: Finished difference Result 13849 states and 19086 transitions. [2022-11-03 04:17:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:17:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 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 527 [2022-11-03 04:17:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:17:51,355 INFO L225 Difference]: With dead ends: 13849 [2022-11-03 04:17:51,355 INFO L226 Difference]: Without dead ends: 10231 [2022-11-03 04:17:51,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:17:51,358 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 1976 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1976 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:17:51,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1976 Valid, 1535 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:17:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10231 states. [2022-11-03 04:17:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10231 to 4697. [2022-11-03 04:17:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 1.375) internal successors, (6457), 4696 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 6457 transitions. [2022-11-03 04:17:51,448 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 6457 transitions. Word has length 527 [2022-11-03 04:17:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:17:51,448 INFO L495 AbstractCegarLoop]: Abstraction has 4697 states and 6457 transitions. [2022-11-03 04:17:51,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 6457 transitions. [2022-11-03 04:17:51,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:17:51,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:17:51,454 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:17:51,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-03 04:17:51,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (133)] Forceful destruction successful, exit code 0 [2022-11-03 04:17:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:51,855 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:17:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:17:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1864056067, now seen corresponding path program 1 times [2022-11-03 04:17:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:17:51,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669184640] [2022-11-03 04:17:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:51,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:17:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:17:51,859 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:17:51,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-03 04:17:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:17:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:17:56,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:03,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:18:03,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669184640] [2022-11-03 04:18:03,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669184640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:03,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762666249] [2022-11-03 04:18:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:03,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:03,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:18:03,340 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:18:03,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2022-11-03 04:18:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:05,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:18:05,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:18:05,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:18:05,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [762666249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:18:05,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:18:05,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:18:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856906414] [2022-11-03 04:18:05,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:18:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:18:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:18:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:18:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:18:05,761 INFO L87 Difference]: Start difference. First operand 4697 states and 6457 transitions. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:18:06,036 INFO L93 Difference]: Finished difference Result 13753 states and 18878 transitions. [2022-11-03 04:18:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:18:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 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 527 [2022-11-03 04:18:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:18:06,042 INFO L225 Difference]: With dead ends: 13753 [2022-11-03 04:18:06,042 INFO L226 Difference]: Without dead ends: 10231 [2022-11-03 04:18:06,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:18:06,045 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 1978 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:18:06,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1978 Valid, 1532 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:18:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10231 states. [2022-11-03 04:18:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10231 to 4697. [2022-11-03 04:18:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 1.3681856899488927) internal successors, (6425), 4696 states have internal predecessors, (6425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 6425 transitions. [2022-11-03 04:18:06,137 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 6425 transitions. Word has length 527 [2022-11-03 04:18:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:18:06,137 INFO L495 AbstractCegarLoop]: Abstraction has 4697 states and 6425 transitions. [2022-11-03 04:18:06,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:06,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 6425 transitions. [2022-11-03 04:18:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:18:06,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:18:06,143 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:18:06,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:06,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (135)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:06,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:06,547 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:18:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:18:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1782318459, now seen corresponding path program 1 times [2022-11-03 04:18:06,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:18:06,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283353202] [2022-11-03 04:18:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:06,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:18:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:18:06,551 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:18:06,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-03 04:18:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:07,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:18:07,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:10,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:18,089 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:18:18,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283353202] [2022-11-03 04:18:18,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283353202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061629766] [2022-11-03 04:18:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:18,090 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:18:18,091 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:18:18,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (137)] Waiting until timeout for monitored process [2022-11-03 04:18:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:18:20,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:18:20,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:18:20,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061629766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:18:20,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:18:20,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:18:20,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782842206] [2022-11-03 04:18:20,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:18:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:18:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:18:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:18:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:18:20,536 INFO L87 Difference]: Start difference. First operand 4697 states and 6425 transitions. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:18:20,758 INFO L93 Difference]: Finished difference Result 13305 states and 18166 transitions. [2022-11-03 04:18:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:18:20,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 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 527 [2022-11-03 04:18:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:18:20,767 INFO L225 Difference]: With dead ends: 13305 [2022-11-03 04:18:20,767 INFO L226 Difference]: Without dead ends: 10199 [2022-11-03 04:18:20,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:18:20,770 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1990 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1990 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:18:20,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1990 Valid, 1526 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:18:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2022-11-03 04:18:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 5273. [2022-11-03 04:18:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 5272 states have (on average 1.3643778452200304) internal successors, (7193), 5272 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 7193 transitions. [2022-11-03 04:18:20,862 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 7193 transitions. Word has length 527 [2022-11-03 04:18:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:18:20,863 INFO L495 AbstractCegarLoop]: Abstraction has 5273 states and 7193 transitions. [2022-11-03 04:18:20,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 7193 transitions. [2022-11-03 04:18:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:18:20,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:18:20,869 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:18:20,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-03 04:18:21,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (137)] Ended with exit code 0 [2022-11-03 04:18:21,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:21,271 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:18:21,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:18:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1107457159, now seen corresponding path program 1 times [2022-11-03 04:18:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:18:21,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212234693] [2022-11-03 04:18:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:21,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:18:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:18:21,275 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:18:21,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-03 04:18:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:18:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:25,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:31,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:18:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212234693] [2022-11-03 04:18:31,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212234693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [325007750] [2022-11-03 04:18:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:31,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:18:31,307 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:18:31,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (139)] Waiting until timeout for monitored process [2022-11-03 04:18:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:33,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:18:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:18:33,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:18:33,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [325007750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:18:33,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:18:33,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:18:33,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755652669] [2022-11-03 04:18:33,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:18:33,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:18:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:18:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:18:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:18:33,760 INFO L87 Difference]: Start difference. First operand 5273 states and 7193 transitions. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:18:33,984 INFO L93 Difference]: Finished difference Result 13449 states and 18286 transitions. [2022-11-03 04:18:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:18:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 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 527 [2022-11-03 04:18:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:18:33,994 INFO L225 Difference]: With dead ends: 13449 [2022-11-03 04:18:33,994 INFO L226 Difference]: Without dead ends: 10247 [2022-11-03 04:18:33,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:18:33,999 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 1994 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:18:33,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 1523 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:18:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2022-11-03 04:18:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 5657. [2022-11-03 04:18:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5657 states, 5656 states have (on average 1.3622701555869872) internal successors, (7705), 5656 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5657 states to 5657 states and 7705 transitions. [2022-11-03 04:18:34,152 INFO L78 Accepts]: Start accepts. Automaton has 5657 states and 7705 transitions. Word has length 527 [2022-11-03 04:18:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:18:34,152 INFO L495 AbstractCegarLoop]: Abstraction has 5657 states and 7705 transitions. [2022-11-03 04:18:34,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5657 states and 7705 transitions. [2022-11-03 04:18:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:18:34,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:18:34,161 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:18:34,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (139)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:34,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:34,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:18:34,573 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:18:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:18:34,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1534011657, now seen corresponding path program 1 times [2022-11-03 04:18:34,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:18:34,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397146157] [2022-11-03 04:18:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:34,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:18:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:18:34,577 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:18:34,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-03 04:18:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:18:36,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:38,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:45,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:18:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397146157] [2022-11-03 04:18:45,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397146157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916984064] [2022-11-03 04:18:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:45,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:18:45,891 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:18:45,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2022-11-03 04:18:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:48,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:18:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:18:48,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:18:48,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916984064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:18:48,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:18:48,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:18:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172233322] [2022-11-03 04:18:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:18:48,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:18:48,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:18:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:18:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:18:48,357 INFO L87 Difference]: Start difference. First operand 5657 states and 7705 transitions. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:48,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:18:48,591 INFO L93 Difference]: Finished difference Result 13593 states and 18446 transitions. [2022-11-03 04:18:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:18:48,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 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 527 [2022-11-03 04:18:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:18:48,599 INFO L225 Difference]: With dead ends: 13593 [2022-11-03 04:18:48,599 INFO L226 Difference]: Without dead ends: 10247 [2022-11-03 04:18:48,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:18:48,603 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 1996 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:18:48,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1996 Valid, 1520 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:18:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2022-11-03 04:18:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 5753. [2022-11-03 04:18:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 1.3617872044506258) internal successors, (7833), 5752 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 7833 transitions. [2022-11-03 04:18:48,722 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 7833 transitions. Word has length 527 [2022-11-03 04:18:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:18:48,723 INFO L495 AbstractCegarLoop]: Abstraction has 5753 states and 7833 transitions. [2022-11-03 04:18:48,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 7833 transitions. [2022-11-03 04:18:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:18:48,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:18:48,733 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:18:48,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (141)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:48,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-03 04:18:49,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:18:49,143 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:18:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:18:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1603659531, now seen corresponding path program 1 times [2022-11-03 04:18:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:18:49,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797475948] [2022-11-03 04:18:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:49,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:18:49,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:18:49,147 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:18:49,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-03 04:18:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:50,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:18:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:53,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:18:59,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:18:59,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797475948] [2022-11-03 04:18:59,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797475948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:59,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981024197] [2022-11-03 04:18:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:59,331 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:59,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:18:59,332 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:18:59,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process [2022-11-03 04:19:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:19:02,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 129 proven. 63 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 04:19:06,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 129 proven. 63 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 04:19:12,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1981024197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429609814] [2022-11-03 04:19:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:12,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:12,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:19:12,676 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:19:12,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-03 04:19:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:19:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:19:15,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:19:17,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429609814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:17,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:19:17,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 19, 19, 8, 8] total 52 [2022-11-03 04:19:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173432037] [2022-11-03 04:19:17,593 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:19:17,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 04:19:17,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:19:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 04:19:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 04:19:17,596 INFO L87 Difference]: Start difference. First operand 5753 states and 7833 transitions. Second operand has 52 states, 52 states have (on average 39.19230769230769) internal successors, (2038), 52 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:20:52,920 INFO L93 Difference]: Finished difference Result 188338 states and 256477 transitions. [2022-11-03 04:20:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2022-11-03 04:20:52,921 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 39.19230769230769) internal successors, (2038), 52 states have internal predecessors, (2038), 0 states have call successors, (0), 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 527 [2022-11-03 04:20:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:20:53,183 INFO L225 Difference]: With dead ends: 188338 [2022-11-03 04:20:53,183 INFO L226 Difference]: Without dead ends: 183436 [2022-11-03 04:20:53,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3583 GetRequests, 3115 SyntacticMatches, 1 SemanticMatches, 467 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89989 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=28919, Invalid=190573, Unknown=0, NotChecked=0, Total=219492 [2022-11-03 04:20:53,216 INFO L413 NwaCegarLoop]: 3674 mSDtfsCounter, 51427 mSDsluCounter, 139935 mSDsCounter, 0 mSdLazyCounter, 11563 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51427 SdHoareTripleChecker+Valid, 143609 SdHoareTripleChecker+Invalid, 51392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 11563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39502 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:20:53,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51427 Valid, 143609 Invalid, 51392 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [327 Valid, 11563 Invalid, 0 Unknown, 39502 Unchecked, 17.6s Time] [2022-11-03 04:20:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183436 states. [2022-11-03 04:20:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183436 to 10439. [2022-11-03 04:20:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10439 states, 10438 states have (on average 1.3767963211343168) internal successors, (14371), 10438 states have internal predecessors, (14371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10439 states to 10439 states and 14371 transitions. [2022-11-03 04:20:54,101 INFO L78 Accepts]: Start accepts. Automaton has 10439 states and 14371 transitions. Word has length 527 [2022-11-03 04:20:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:20:54,102 INFO L495 AbstractCegarLoop]: Abstraction has 10439 states and 14371 transitions. [2022-11-03 04:20:54,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 39.19230769230769) internal successors, (2038), 52 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 10439 states and 14371 transitions. [2022-11-03 04:20:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:20:54,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:20:54,114 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:20:54,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (143)] Forceful destruction successful, exit code 0 [2022-11-03 04:20:54,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2022-11-03 04:20:54,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-11-03 04:20:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:20:54,728 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:20:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:20:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash 80978833, now seen corresponding path program 1 times [2022-11-03 04:20:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:20:54,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807969553] [2022-11-03 04:20:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:20:54,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:20:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:20:54,732 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:20:54,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-03 04:20:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:20:56,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:20:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:20:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:20:59,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:05,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807969553] [2022-11-03 04:21:05,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807969553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:05,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252823571] [2022-11-03 04:21:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:05,482 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:05,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:21:05,483 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:21:05,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (146)] Waiting until timeout for monitored process [2022-11-03 04:21:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:07,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:21:07,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:21:07,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:21:07,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [252823571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:21:07,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:21:07,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:21:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052097653] [2022-11-03 04:21:07,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:21:07,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:21:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:21:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:21:07,649 INFO L87 Difference]: Start difference. First operand 10439 states and 14371 transitions. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:21:08,003 INFO L93 Difference]: Finished difference Result 40554 states and 56047 transitions. [2022-11-03 04:21:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:21:08,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 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 527 [2022-11-03 04:21:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:21:08,019 INFO L225 Difference]: With dead ends: 40554 [2022-11-03 04:21:08,019 INFO L226 Difference]: Without dead ends: 30586 [2022-11-03 04:21:08,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:21:08,025 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1933 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1933 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:21:08,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1933 Valid, 1587 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:21:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30586 states. [2022-11-03 04:21:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30586 to 11091. [2022-11-03 04:21:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11091 states, 11090 states have (on average 1.3792605951307484) internal successors, (15296), 11090 states have internal predecessors, (15296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 15296 transitions. [2022-11-03 04:21:08,250 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 15296 transitions. Word has length 527 [2022-11-03 04:21:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:21:08,250 INFO L495 AbstractCegarLoop]: Abstraction has 11091 states and 15296 transitions. [2022-11-03 04:21:08,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 15296 transitions. [2022-11-03 04:21:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:21:08,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:21:08,263 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:21:08,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (145)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:08,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (146)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:08,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:08,687 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:21:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:21:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 857226387, now seen corresponding path program 1 times [2022-11-03 04:21:08,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:21:08,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580435474] [2022-11-03 04:21:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:21:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:21:08,692 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:21:08,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-03 04:21:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:10,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:21:10,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:12,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:19,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:19,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580435474] [2022-11-03 04:21:19,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580435474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:19,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2123022656] [2022-11-03 04:21:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:19,218 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:19,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:21:19,219 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:21:19,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (148)] Waiting until timeout for monitored process [2022-11-03 04:21:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:21,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:21:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:21:21,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:21:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2123022656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:21:21,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:21:21,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:21:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236534946] [2022-11-03 04:21:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:21:21,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:21:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:21:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:21:21,512 INFO L87 Difference]: Start difference. First operand 11091 states and 15296 transitions. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:21:21,824 INFO L93 Difference]: Finished difference Result 38665 states and 53325 transitions. [2022-11-03 04:21:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:21:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 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 527 [2022-11-03 04:21:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:21:21,844 INFO L225 Difference]: With dead ends: 38665 [2022-11-03 04:21:21,844 INFO L226 Difference]: Without dead ends: 28375 [2022-11-03 04:21:21,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:21:21,855 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 1948 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:21:21,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 1585 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:21:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28375 states. [2022-11-03 04:21:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28375 to 11685. [2022-11-03 04:21:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11685 states, 11684 states have (on average 1.3804347826086956) internal successors, (16129), 11684 states have internal predecessors, (16129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11685 states to 11685 states and 16129 transitions. [2022-11-03 04:21:22,085 INFO L78 Accepts]: Start accepts. Automaton has 11685 states and 16129 transitions. Word has length 527 [2022-11-03 04:21:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:21:22,086 INFO L495 AbstractCegarLoop]: Abstraction has 11685 states and 16129 transitions. [2022-11-03 04:21:22,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11685 states and 16129 transitions. [2022-11-03 04:21:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:21:22,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:21:22,094 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:21:22,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (148)] Ended with exit code 0 [2022-11-03 04:21:22,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (147)] Ended with exit code 0 [2022-11-03 04:21:22,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:21:22,495 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:21:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:21:22,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1928560019, now seen corresponding path program 1 times [2022-11-03 04:21:22,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:21:22,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407805735] [2022-11-03 04:21:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:22,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:21:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:21:22,499 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:21:22,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-03 04:21:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:21:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:26,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:31,730 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:31,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407805735] [2022-11-03 04:21:31,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407805735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:31,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633504204] [2022-11-03 04:21:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:31,731 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:31,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:21:31,732 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:21:31,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (150)] Waiting until timeout for monitored process [2022-11-03 04:21:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:33,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:21:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:21:34,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:21:34,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [633504204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:21:34,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:21:34,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:21:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225047285] [2022-11-03 04:21:34,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:21:34,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:21:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:21:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:21:34,076 INFO L87 Difference]: Start difference. First operand 11685 states and 16129 transitions. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:21:34,491 INFO L93 Difference]: Finished difference Result 39563 states and 54498 transitions. [2022-11-03 04:21:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:21:34,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 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 527 [2022-11-03 04:21:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:21:34,516 INFO L225 Difference]: With dead ends: 39563 [2022-11-03 04:21:34,516 INFO L226 Difference]: Without dead ends: 29599 [2022-11-03 04:21:34,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:21:34,526 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1951 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1951 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:21:34,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1951 Valid, 1583 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:21:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29599 states. [2022-11-03 04:21:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29599 to 12069. [2022-11-03 04:21:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12069 states, 12068 states have (on average 1.3757872058336096) internal successors, (16603), 12068 states have internal predecessors, (16603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12069 states to 12069 states and 16603 transitions. [2022-11-03 04:21:34,877 INFO L78 Accepts]: Start accepts. Automaton has 12069 states and 16603 transitions. Word has length 527 [2022-11-03 04:21:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:21:34,877 INFO L495 AbstractCegarLoop]: Abstraction has 12069 states and 16603 transitions. [2022-11-03 04:21:34,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 12069 states and 16603 transitions. [2022-11-03 04:21:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:21:34,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:21:34,889 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:21:34,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (149)] Ended with exit code 0 [2022-11-03 04:21:35,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (150)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:35,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:35,291 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:21:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:21:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1112512789, now seen corresponding path program 1 times [2022-11-03 04:21:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:21:35,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766294008] [2022-11-03 04:21:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:35,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:21:35,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:21:35,297 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:21:35,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-03 04:21:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:21:36,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:39,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:46,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:46,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766294008] [2022-11-03 04:21:46,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766294008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:46,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2013238745] [2022-11-03 04:21:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:46,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:46,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:21:46,942 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:21:46,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (152)] Waiting until timeout for monitored process [2022-11-03 04:21:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:49,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:21:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:21:49,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:21:49,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2013238745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:21:49,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:21:49,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:21:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293005184] [2022-11-03 04:21:49,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:21:49,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:21:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:49,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:21:49,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:21:49,209 INFO L87 Difference]: Start difference. First operand 12069 states and 16603 transitions. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:21:49,526 INFO L93 Difference]: Finished difference Result 39147 states and 53606 transitions. [2022-11-03 04:21:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:21:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 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 527 [2022-11-03 04:21:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:21:49,549 INFO L225 Difference]: With dead ends: 39147 [2022-11-03 04:21:49,549 INFO L226 Difference]: Without dead ends: 29951 [2022-11-03 04:21:49,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:21:49,556 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 1962 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:21:49,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1962 Valid, 1580 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:21:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2022-11-03 04:21:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 15013. [2022-11-03 04:21:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15013 states, 15012 states have (on average 1.3671063149480416) internal successors, (20523), 15012 states have internal predecessors, (20523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 20523 transitions. [2022-11-03 04:21:49,806 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 20523 transitions. Word has length 527 [2022-11-03 04:21:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:21:49,807 INFO L495 AbstractCegarLoop]: Abstraction has 15013 states and 20523 transitions. [2022-11-03 04:21:49,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 20523 transitions. [2022-11-03 04:21:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:21:49,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:21:49,817 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:21:49,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (152)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:50,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (151)] Ended with exit code 0 [2022-11-03 04:21:50,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:21:50,219 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:21:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:21:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash -656958825, now seen corresponding path program 1 times [2022-11-03 04:21:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:21:50,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973709733] [2022-11-03 04:21:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:50,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:21:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:21:50,223 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:21:50,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-03 04:21:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:51,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:21:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:21:54,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:22:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:22:01,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:22:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973709733] [2022-11-03 04:22:01,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973709733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:22:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1921706670] [2022-11-03 04:22:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:22:01,950 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:22:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:22:01,950 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:22:01,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2022-11-03 04:22:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:22:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:22:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:22:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:22:04,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:22:04,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1921706670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:22:04,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:22:04,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 04:22:04,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564432941] [2022-11-03 04:22:04,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:22:04,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:22:04,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:22:04,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:22:04,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:22:04,243 INFO L87 Difference]: Start difference. First operand 15013 states and 20523 transitions. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:22:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:22:04,631 INFO L93 Difference]: Finished difference Result 40911 states and 55758 transitions. [2022-11-03 04:22:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:22:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 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 527 [2022-11-03 04:22:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:22:04,648 INFO L225 Difference]: With dead ends: 40911 [2022-11-03 04:22:04,649 INFO L226 Difference]: Without dead ends: 30395 [2022-11-03 04:22:04,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:22:04,654 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 1965 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1965 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:22:04,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1965 Valid, 1578 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:22:04,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30395 states. [2022-11-03 04:22:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30395 to 16573. [2022-11-03 04:22:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16573 states, 16572 states have (on average 1.360789283128168) internal successors, (22551), 16572 states have internal predecessors, (22551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:22:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16573 states to 16573 states and 22551 transitions. [2022-11-03 04:22:04,908 INFO L78 Accepts]: Start accepts. Automaton has 16573 states and 22551 transitions. Word has length 527 [2022-11-03 04:22:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:22:04,908 INFO L495 AbstractCegarLoop]: Abstraction has 16573 states and 22551 transitions. [2022-11-03 04:22:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:22:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16573 states and 22551 transitions. [2022-11-03 04:22:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 04:22:04,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:22:04,922 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:22:04,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (153)] Ended with exit code 0 [2022-11-03 04:22:05,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (154)] Ended with exit code 0 [2022-11-03 04:22:05,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:22:05,323 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:22:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:22:05,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1240020633, now seen corresponding path program 1 times [2022-11-03 04:22:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:22:05,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013503297] [2022-11-03 04:22:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:22:05,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:22:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:22:05,327 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:22:05,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26efcba7-c4a8-4d9b-9f8e-6a9bce4da140/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-03 04:22:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:22:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 3628 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:22:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:22:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:22:09,350 INFO L328 TraceCheckSpWp]: Computing backward predicates...