./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.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_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/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_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/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_a5a922d5-3dd0-4d40-b027-f9af01794a70/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 5d2e3d2da64545cb55955230543ccece093594c714793fa68629cfbe91e63b67 --- 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 04:01:19,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:20,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:20,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:20,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:20,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:20,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:20,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:20,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:20,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:20,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:20,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:20,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:20,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:20,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:20,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:20,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:20,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:20,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:20,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:20,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:20,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:20,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:20,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:20,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:20,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:20,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:20,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:20,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:20,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:20,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:20,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:20,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:20,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:20,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:20,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:20,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:20,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:20,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:20,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:20,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:20,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:01:20,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:20,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:20,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:20,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:20,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:20,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:20,174 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:20,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:20,175 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:20,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:01:20,177 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:20,178 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:20,178 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:01:20,178 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:01:20,179 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:20,179 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:01:20,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:01:20,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:01:20,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:20,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:01:20,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:20,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:20,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:20,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:20,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:20,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:20,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:20,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:20,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:20,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:20,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:20,194 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:01:20,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:20,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:20,195 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:01:20,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:01:20,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:20,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:20,196 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_a5a922d5-3dd0-4d40-b027-f9af01794a70/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d2e3d2da64545cb55955230543ccece093594c714793fa68629cfbe91e63b67 [2022-11-03 04:01:20,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:20,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:20,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:20,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:20,498 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:20,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c [2022-11-03 04:01:20,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/c442a5136/2b57bdc2cd0a4b2a9905060bec9138bb/FLAGbc5b7ca79 [2022-11-03 04:01:21,141 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:21,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c [2022-11-03 04:01:21,156 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/c442a5136/2b57bdc2cd0a4b2a9905060bec9138bb/FLAGbc5b7ca79 [2022-11-03 04:01:21,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/c442a5136/2b57bdc2cd0a4b2a9905060bec9138bb [2022-11-03 04:01:21,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:21,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:21,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:21,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:21,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:21,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:21" (1/1) ... [2022-11-03 04:01:21,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f77f802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:21, skipping insertion in model container [2022-11-03 04:01:21,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:21" (1/1) ... [2022-11-03 04:01:21,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:21,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:21,826 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_a5a922d5-3dd0-4d40-b027-f9af01794a70/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c[1107,1120] [2022-11-03 04:01:22,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:22,082 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:22,096 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_a5a922d5-3dd0-4d40-b027-f9af01794a70/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c[1107,1120] [2022-11-03 04:01:22,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:22,232 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:22,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22 WrapperNode [2022-11-03 04:01:22,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:22,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:22,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:22,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:22,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,354 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 974 [2022-11-03 04:01:22,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:22,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:22,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:22,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:22,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:22,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:22,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:22,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:22,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:22,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:22,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:22,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:22,918 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:22,920 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:24,346 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:26,403 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:26,403 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:01:26,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:26 BoogieIcfgContainer [2022-11-03 04:01:26,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:26,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:26,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:26,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:26,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:21" (1/3) ... [2022-11-03 04:01:26,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2226b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:26, skipping insertion in model container [2022-11-03 04:01:26,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22" (2/3) ... [2022-11-03 04:01:26,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2226b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:26, skipping insertion in model container [2022-11-03 04:01:26,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:26" (3/3) ... [2022-11-03 04:01:26,415 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_vMiim_p1.c [2022-11-03 04:01:26,433 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:26,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:01:26,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:26,489 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;@74c1b804, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:26,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:01:26,497 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 04:01:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:01:26,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:26,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:01:26,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash 13922425, now seen corresponding path program 1 times [2022-11-03 04:01:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:26,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587777130] [2022-11-03 04:01:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:26,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:01:26,848 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:01:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:01:27,082 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:01:27,086 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:01:27,088 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:01:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:01:27,096 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:01:27,101 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:01:27,149 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:01:27,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:01:27 BoogieIcfgContainer [2022-11-03 04:01:27,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:01:27,163 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:01:27,163 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:01:27,163 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:01:27,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:26" (3/4) ... [2022-11-03 04:01:27,168 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:01:27,168 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:01:27,169 INFO L158 Benchmark]: Toolchain (without parser) took 5704.77ms. Allocated memory was 142.6MB in the beginning and 266.3MB in the end (delta: 123.7MB). Free memory was 108.0MB in the beginning and 151.4MB in the end (delta: -43.5MB). Peak memory consumption was 80.7MB. Max. memory is 16.1GB. [2022-11-03 04:01:27,170 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 57.9MB in the beginning and 57.8MB in the end (delta: 32.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:01:27,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 766.17ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 101.6MB in the end (delta: 6.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 04:01:27,172 INFO L158 Benchmark]: Boogie Procedure Inliner took 120.28ms. Allocated memory is still 142.6MB. Free memory was 101.6MB in the beginning and 90.6MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 04:01:27,172 INFO L158 Benchmark]: Boogie Preprocessor took 95.59ms. Allocated memory is still 142.6MB. Free memory was 90.6MB in the beginning and 84.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 04:01:27,173 INFO L158 Benchmark]: RCFGBuilder took 3954.62ms. Allocated memory was 142.6MB in the beginning and 266.3MB in the end (delta: 123.7MB). Free memory was 84.3MB in the beginning and 193.4MB in the end (delta: -109.1MB). Peak memory consumption was 126.6MB. Max. memory is 16.1GB. [2022-11-03 04:01:27,174 INFO L158 Benchmark]: TraceAbstraction took 753.82ms. Allocated memory is still 266.3MB. Free memory was 192.3MB in the beginning and 151.4MB in the end (delta: 40.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2022-11-03 04:01:27,174 INFO L158 Benchmark]: Witness Printer took 5.54ms. Allocated memory is still 266.3MB. Free memory is still 151.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:01:27,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 57.9MB in the beginning and 57.8MB in the end (delta: 32.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 766.17ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 101.6MB in the end (delta: 6.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 120.28ms. Allocated memory is still 142.6MB. Free memory was 101.6MB in the beginning and 90.6MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 95.59ms. Allocated memory is still 142.6MB. Free memory was 90.6MB in the beginning and 84.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 3954.62ms. Allocated memory was 142.6MB in the beginning and 266.3MB in the end (delta: 123.7MB). Free memory was 84.3MB in the beginning and 193.4MB in the end (delta: -109.1MB). Peak memory consumption was 126.6MB. Max. memory is 16.1GB. * TraceAbstraction took 753.82ms. Allocated memory is still 266.3MB. Free memory was 192.3MB in the beginning and 151.4MB in the end (delta: 40.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * Witness Printer took 5.54ms. Allocated memory is still 266.3MB. Free memory is still 151.4MB. 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 218, overapproximation of bitwiseOr at line 221, overapproximation of bitwiseAnd at line 197. 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_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 8); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (8 - 1); [L34] const SORT_7 mask_SORT_7 = (SORT_7)-1 >> (sizeof(SORT_7) * 8 - 5); [L35] const SORT_7 msb_SORT_7 = (SORT_7)1 << (5 - 1); [L37] const SORT_45 mask_SORT_45 = (SORT_45)-1 >> (sizeof(SORT_45) * 8 - 6); [L38] const SORT_45 msb_SORT_45 = (SORT_45)1 << (6 - 1); [L40] const SORT_55 mask_SORT_55 = (SORT_55)-1 >> (sizeof(SORT_55) * 8 - 32); [L41] const SORT_55 msb_SORT_55 = (SORT_55)1 << (32 - 1); [L43] const SORT_61 mask_SORT_61 = (SORT_61)-1 >> (sizeof(SORT_61) * 8 - 25); [L44] const SORT_61 msb_SORT_61 = (SORT_61)1 << (25 - 1); [L46] const SORT_63 mask_SORT_63 = (SORT_63)-1 >> (sizeof(SORT_63) * 8 - 7); [L47] const SORT_63 msb_SORT_63 = (SORT_63)1 << (7 - 1); [L49] const SORT_84 mask_SORT_84 = (SORT_84)-1 >> (sizeof(SORT_84) * 8 - 2); [L50] const SORT_84 msb_SORT_84 = (SORT_84)1 << (2 - 1); [L52] const SORT_122 mask_SORT_122 = (SORT_122)-1 >> (sizeof(SORT_122) * 8 - 3); [L53] const SORT_122 msb_SORT_122 = (SORT_122)1 << (3 - 1); [L55] const SORT_1 var_17 = 0; [L56] const SORT_1 var_41 = 1; [L57] const SORT_45 var_46 = 0; [L58] const SORT_5 var_50 = 0; [L59] const SORT_5 var_56 = 2; [L60] const SORT_55 var_58 = 2; [L61] const SORT_61 var_62 = 0; [L62] const SORT_55 var_66 = 1; [L63] const SORT_55 var_112 = 0; [L64] const SORT_45 var_218 = 33; [L65] const SORT_5 var_227 = 1; [L67] SORT_1 input_2; [L68] SORT_3 input_4; [L69] SORT_5 input_6; [L70] SORT_7 input_8; [L71] SORT_1 input_9; [L72] SORT_1 input_10; [L73] SORT_1 input_11; [L74] SORT_1 input_12; [L75] SORT_7 input_13; [L76] SORT_1 input_14; [L77] SORT_1 input_15; [L78] SORT_1 input_16; [L79] SORT_84 input_85; [L80] SORT_1 input_87; [L81] SORT_1 input_89; [L82] SORT_1 input_91; [L83] SORT_1 input_99; [L84] SORT_1 input_105; [L85] SORT_1 input_134; [L86] SORT_1 input_149; [L87] SORT_7 input_162; [L88] SORT_1 input_164; [L89] SORT_3 input_166; [L90] SORT_5 input_168; [L91] SORT_1 input_179; [L93] SORT_1 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] SORT_45 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L101] SORT_5 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L102] SORT_1 state_70 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_76 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_80 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_82 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_93 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_95 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_97 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_101 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_103 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_107 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_136 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_138 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_140 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_142 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_144 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_151 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_153 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_170 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_172 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L121] SORT_1 state_181 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_1 state_183 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_1 state_185 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_1 init_19_arg_1 = var_17; [L126] state_18 = init_19_arg_1 [L127] SORT_1 init_22_arg_1 = var_17; [L128] state_21 = init_22_arg_1 [L129] SORT_1 init_24_arg_1 = var_17; [L130] state_23 = init_24_arg_1 [L131] SORT_1 init_27_arg_1 = var_17; [L132] state_26 = init_27_arg_1 [L133] SORT_1 init_30_arg_1 = var_17; [L134] state_29 = init_30_arg_1 [L135] SORT_1 init_33_arg_1 = var_17; [L136] state_32 = init_33_arg_1 [L137] SORT_1 init_36_arg_1 = var_17; [L138] state_35 = init_36_arg_1 [L139] SORT_45 init_48_arg_1 = var_46; [L140] state_47 = init_48_arg_1 [L141] SORT_5 init_52_arg_1 = var_50; [L142] state_51 = init_52_arg_1 [L143] SORT_1 init_71_arg_1 = var_17; [L144] state_70 = init_71_arg_1 [L145] SORT_1 init_77_arg_1 = var_17; [L146] state_76 = init_77_arg_1 [L147] SORT_1 init_81_arg_1 = var_17; [L148] state_80 = init_81_arg_1 [L149] SORT_1 init_83_arg_1 = var_17; [L150] state_82 = init_83_arg_1 [L151] SORT_1 init_94_arg_1 = var_17; [L152] state_93 = init_94_arg_1 [L153] SORT_1 init_96_arg_1 = var_17; [L154] state_95 = init_96_arg_1 [L155] SORT_1 init_98_arg_1 = var_17; [L156] state_97 = init_98_arg_1 [L157] SORT_1 init_102_arg_1 = var_17; [L158] state_101 = init_102_arg_1 [L159] SORT_1 init_104_arg_1 = var_17; [L160] state_103 = init_104_arg_1 [L161] SORT_1 init_108_arg_1 = var_17; [L162] state_107 = init_108_arg_1 [L163] SORT_1 init_137_arg_1 = var_17; [L164] state_136 = init_137_arg_1 [L165] SORT_1 init_139_arg_1 = var_17; [L166] state_138 = init_139_arg_1 [L167] SORT_1 init_141_arg_1 = var_17; [L168] state_140 = init_141_arg_1 [L169] SORT_1 init_143_arg_1 = var_17; [L170] state_142 = init_143_arg_1 [L171] SORT_1 init_145_arg_1 = var_17; [L172] state_144 = init_145_arg_1 [L173] SORT_1 init_152_arg_1 = var_17; [L174] state_151 = init_152_arg_1 [L175] SORT_1 init_154_arg_1 = var_17; [L176] state_153 = init_154_arg_1 [L177] SORT_1 init_171_arg_1 = var_17; [L178] state_170 = init_171_arg_1 [L179] SORT_1 init_173_arg_1 = var_17; [L180] state_172 = init_173_arg_1 [L181] SORT_1 init_182_arg_1 = var_17; [L182] state_181 = init_182_arg_1 [L183] SORT_1 init_184_arg_1 = var_17; [L184] state_183 = init_184_arg_1 [L185] SORT_1 init_186_arg_1 = var_17; [L186] state_185 = init_186_arg_1 VAL [init_102_arg_1=0, init_104_arg_1=0, init_108_arg_1=0, init_137_arg_1=0, init_139_arg_1=0, init_141_arg_1=0, init_143_arg_1=0, init_145_arg_1=0, init_152_arg_1=0, init_154_arg_1=0, init_171_arg_1=0, init_173_arg_1=0, init_182_arg_1=0, init_184_arg_1=0, init_186_arg_1=0, init_19_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_27_arg_1=0, init_30_arg_1=0, init_33_arg_1=0, init_36_arg_1=0, init_48_arg_1=0, init_52_arg_1=0, init_71_arg_1=0, init_77_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_94_arg_1=0, init_96_arg_1=0, init_98_arg_1=0, mask_SORT_1=1, mask_SORT_122=7, mask_SORT_3=65535, mask_SORT_45=63, mask_SORT_5=255, mask_SORT_55=4294967295, mask_SORT_61=4294967295, mask_SORT_63=127, mask_SORT_7=31, mask_SORT_84=3, msb_SORT_1=1, msb_SORT_122=4, msb_SORT_3=32768, msb_SORT_45=32, msb_SORT_5=128, msb_SORT_55=2147483648, msb_SORT_61=16777216, msb_SORT_63=64, msb_SORT_7=16, msb_SORT_84=2, state_101=0, state_103=0, state_107=0, state_136=0, state_138=0, state_140=0, state_142=0, state_144=0, state_151=0, state_153=0, state_170=0, state_172=0, state_18=0, state_181=0, state_183=0, state_185=0, state_21=0, state_23=0, state_26=0, state_29=0, state_32=0, state_35=0, state_47=0, state_51=0, state_70=0, state_76=0, state_80=0, state_82=0, state_93=0, state_95=0, state_97=0, var_112=0, var_17=0, var_218=33, var_227=1, var_41=1, var_46=0, var_50=0, var_56=2, var_58=2, var_62=0, var_66=1] [L189] input_2 = __VERIFIER_nondet_uchar() [L190] input_4 = __VERIFIER_nondet_ushort() [L191] input_6 = __VERIFIER_nondet_uchar() [L192] input_8 = __VERIFIER_nondet_uchar() [L193] input_9 = __VERIFIER_nondet_uchar() [L194] input_10 = __VERIFIER_nondet_uchar() [L195] input_11 = __VERIFIER_nondet_uchar() [L196] input_12 = __VERIFIER_nondet_uchar() [L197] input_12 = input_12 & mask_SORT_1 [L198] input_13 = __VERIFIER_nondet_uchar() [L199] input_14 = __VERIFIER_nondet_uchar() [L200] input_15 = __VERIFIER_nondet_uchar() [L201] input_16 = __VERIFIER_nondet_uchar() [L202] input_85 = __VERIFIER_nondet_uchar() [L203] input_87 = __VERIFIER_nondet_uchar() [L204] input_89 = __VERIFIER_nondet_uchar() [L205] input_91 = __VERIFIER_nondet_uchar() [L206] input_99 = __VERIFIER_nondet_uchar() [L207] input_105 = __VERIFIER_nondet_uchar() [L208] input_134 = __VERIFIER_nondet_uchar() [L209] input_149 = __VERIFIER_nondet_uchar() [L210] input_162 = __VERIFIER_nondet_uchar() [L211] input_164 = __VERIFIER_nondet_uchar() [L212] input_166 = __VERIFIER_nondet_ushort() [L213] input_168 = __VERIFIER_nondet_uchar() [L214] input_179 = __VERIFIER_nondet_uchar() [L217] SORT_1 var_20_arg_0 = state_18; [L218] SORT_1 var_20 = ~var_20_arg_0; [L219] SORT_1 var_25_arg_0 = state_21; [L220] SORT_1 var_25_arg_1 = state_23; [L221] SORT_1 var_25 = var_25_arg_0 | var_25_arg_1; [L222] SORT_1 var_28_arg_0 = var_25; [L223] SORT_1 var_28_arg_1 = state_26; [L224] SORT_1 var_28 = var_28_arg_0 | var_28_arg_1; [L225] SORT_1 var_31_arg_0 = var_28; [L226] SORT_1 var_31_arg_1 = state_29; [L227] SORT_1 var_31 = var_31_arg_0 | var_31_arg_1; [L228] SORT_1 var_34_arg_0 = var_31; [L229] SORT_1 var_34_arg_1 = state_32; [L230] SORT_1 var_34 = var_34_arg_0 | var_34_arg_1; [L231] SORT_1 var_37_arg_0 = var_34; [L232] SORT_1 var_37_arg_1 = state_35; [L233] SORT_1 var_37 = var_37_arg_0 | var_37_arg_1; [L234] SORT_1 var_38_arg_0 = var_20; [L235] SORT_1 var_38_arg_1 = var_37; [L236] SORT_1 var_38 = var_38_arg_0 | var_38_arg_1; [L237] SORT_1 var_42_arg_0 = var_38; [L238] SORT_1 var_42 = ~var_42_arg_0; [L239] SORT_1 var_43_arg_0 = var_41; [L240] SORT_1 var_43_arg_1 = var_42; [L241] SORT_1 var_43 = var_43_arg_0 & var_43_arg_1; [L242] var_43 = var_43 & mask_SORT_1 [L243] SORT_1 bad_44_arg_0 = var_43; [L244] CALL __VERIFIER_assert(!(bad_44_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: 0.6s, 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, 0.2s 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 04:01:27,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/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_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/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_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/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_a5a922d5-3dd0-4d40-b027-f9af01794a70/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 5d2e3d2da64545cb55955230543ccece093594c714793fa68629cfbe91e63b67 --- 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 04:01:29,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:29,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:29,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:29,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:29,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:29,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:29,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:29,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:29,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:29,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:29,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:29,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:29,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:29,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:29,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:29,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:29,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:29,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:29,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:29,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:29,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:29,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:29,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:29,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:29,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:29,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:29,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:29,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:29,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:29,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:29,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:29,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:29,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:29,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:29,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:29,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:29,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:29,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:29,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:29,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:29,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:01:30,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:30,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:30,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:30,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:30,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:30,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:30,044 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:30,045 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:30,045 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:30,045 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:30,046 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:30,046 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:30,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:30,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:30,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:30,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:30,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:30,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:01:30,049 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:01:30,049 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:01:30,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:30,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:30,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:30,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:30,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:01:30,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:30,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:30,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:30,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:30,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:30,052 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:01:30,053 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:30,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:30,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:30,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:01:30,054 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_a5a922d5-3dd0-4d40-b027-f9af01794a70/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d2e3d2da64545cb55955230543ccece093594c714793fa68629cfbe91e63b67 [2022-11-03 04:01:30,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:30,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:30,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:30,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:30,549 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:30,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c [2022-11-03 04:01:30,634 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/8ae4eda42/d86d095573954a17a81e2c8c37c624a6/FLAGf94b4487a [2022-11-03 04:01:31,387 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:31,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c [2022-11-03 04:01:31,403 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/8ae4eda42/d86d095573954a17a81e2c8c37c624a6/FLAGf94b4487a [2022-11-03 04:01:31,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/data/8ae4eda42/d86d095573954a17a81e2c8c37c624a6 [2022-11-03 04:01:31,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:31,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:31,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:31,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:31,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:31,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:31" (1/1) ... [2022-11-03 04:01:31,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1716e598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:31, skipping insertion in model container [2022-11-03 04:01:31,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:31" (1/1) ... [2022-11-03 04:01:31,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:31,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:31,842 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_a5a922d5-3dd0-4d40-b027-f9af01794a70/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c[1107,1120] [2022-11-03 04:01:32,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:32,088 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:32,101 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_a5a922d5-3dd0-4d40-b027-f9af01794a70/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p1.c[1107,1120] [2022-11-03 04:01:32,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:32,312 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:32,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32 WrapperNode [2022-11-03 04:01:32,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:32,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:32,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:32,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:32,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,404 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 974 [2022-11-03 04:01:32,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:32,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:32,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:32,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:32,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:32,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:32,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:32,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:32,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (1/1) ... [2022-11-03 04:01:32,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:32,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:32,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:32,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:32,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:32,912 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:32,915 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:33,775 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:33,785 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:33,786 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:01:33,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:33 BoogieIcfgContainer [2022-11-03 04:01:33,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:33,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:33,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:33,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:33,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:31" (1/3) ... [2022-11-03 04:01:33,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a1637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:33, skipping insertion in model container [2022-11-03 04:01:33,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:32" (2/3) ... [2022-11-03 04:01:33,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a1637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:33, skipping insertion in model container [2022-11-03 04:01:33,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:33" (3/3) ... [2022-11-03 04:01:33,798 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_vMiim_p1.c [2022-11-03 04:01:33,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:33,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:01:33,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:33,924 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;@49551f56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:33,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:01:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.496) internal successors, (187), 126 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:01:33,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:33,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:01:33,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:01:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:33,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051340704] [2022-11-03 04:01:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:33,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:33,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:34,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:01:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:01:34,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:34,490 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 04:01:34,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:34,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:34,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051340704] [2022-11-03 04:01:34,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051340704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:34,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:34,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:34,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913970159] [2022-11-03 04:01:34,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:34,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:34,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:34,548 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.496) internal successors, (187), 126 states have internal predecessors, (187), 0 states have call successors, (0), 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 04:01:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:34,751 INFO L93 Difference]: Finished difference Result 368 states and 552 transitions. [2022-11-03 04:01:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:34,757 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 04:01:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:34,780 INFO L225 Difference]: With dead ends: 368 [2022-11-03 04:01:34,781 INFO L226 Difference]: Without dead ends: 243 [2022-11-03 04:01:34,785 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 04:01:34,790 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 352 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:34,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 522 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-03 04:01:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 125. [2022-11-03 04:01:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 183 transitions. [2022-11-03 04:01:34,884 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 183 transitions. Word has length 5 [2022-11-03 04:01:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:34,885 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 183 transitions. [2022-11-03 04:01:34,886 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 04:01:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 183 transitions. [2022-11-03 04:01:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:34,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:34,895 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] [2022-11-03 04:01:34,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:35,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:35,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1276738581, now seen corresponding path program 1 times [2022-11-03 04:01:35,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:35,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906129690] [2022-11-03 04:01:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:35,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:35,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:35,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:01:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:35,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:35,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:35,745 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 04:01:35,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:35,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:35,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906129690] [2022-11-03 04:01:35,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906129690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:35,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:35,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499156410] [2022-11-03 04:01:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:35,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:35,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:35,770 INFO L87 Difference]: Start difference. First operand 125 states and 183 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:35,873 INFO L93 Difference]: Finished difference Result 483 states and 714 transitions. [2022-11-03 04:01:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:35,877 INFO L225 Difference]: With dead ends: 483 [2022-11-03 04:01:35,877 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 04:01:35,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 04:01:35,880 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 512 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:35,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 702 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 04:01:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 131. [2022-11-03 04:01:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4692307692307693) internal successors, (191), 130 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 191 transitions. [2022-11-03 04:01:35,893 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 191 transitions. Word has length 124 [2022-11-03 04:01:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:35,893 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 191 transitions. [2022-11-03 04:01:35,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 191 transitions. [2022-11-03 04:01:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:35,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:35,896 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] [2022-11-03 04:01:35,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:36,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:36,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash 652193645, now seen corresponding path program 1 times [2022-11-03 04:01:36,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:36,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145982965] [2022-11-03 04:01:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:36,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:36,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:36,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:36,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:01:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:36,848 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 04:01:36,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:36,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:36,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145982965] [2022-11-03 04:01:36,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145982965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:36,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:36,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886642501] [2022-11-03 04:01:36,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:36,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:36,867 INFO L87 Difference]: Start difference. First operand 131 states and 191 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:37,010 INFO L93 Difference]: Finished difference Result 483 states and 713 transitions. [2022-11-03 04:01:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:37,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:37,016 INFO L225 Difference]: With dead ends: 483 [2022-11-03 04:01:37,016 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 04:01:37,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 04:01:37,018 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 501 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 683 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 04:01:37,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 683 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 04:01:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 135. [2022-11-03 04:01:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.462686567164179) internal successors, (196), 134 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-11-03 04:01:37,043 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 124 [2022-11-03 04:01:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:37,044 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-11-03 04:01:37,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-11-03 04:01:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:37,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:37,048 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] [2022-11-03 04:01:37,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 04:01:37,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:37,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash -995169297, now seen corresponding path program 1 times [2022-11-03 04:01:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:37,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569324270] [2022-11-03 04:01:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:37,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:37,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:37,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:01:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:37,795 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 04:01:37,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:37,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:37,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569324270] [2022-11-03 04:01:37,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569324270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:37,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:37,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:37,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523962425] [2022-11-03 04:01:37,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:37,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:37,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:37,800 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:37,862 INFO L93 Difference]: Finished difference Result 483 states and 712 transitions. [2022-11-03 04:01:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:37,865 INFO L225 Difference]: With dead ends: 483 [2022-11-03 04:01:37,865 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 04:01:37,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 04:01:37,867 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 495 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:37,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 700 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 04:01:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 137. [2022-11-03 04:01:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4558823529411764) internal successors, (198), 136 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 198 transitions. [2022-11-03 04:01:37,878 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 198 transitions. Word has length 124 [2022-11-03 04:01:37,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:37,878 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 198 transitions. [2022-11-03 04:01:37,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,879 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 198 transitions. [2022-11-03 04:01:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:37,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:37,881 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] [2022-11-03 04:01:37,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:38,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:38,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2033753871, now seen corresponding path program 1 times [2022-11-03 04:01:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:38,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834309973] [2022-11-03 04:01:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:38,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:38,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:38,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:38,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:01:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:38,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:38,750 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 04:01:38,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:38,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:38,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834309973] [2022-11-03 04:01:38,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834309973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:38,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:38,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363771381] [2022-11-03 04:01:38,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:38,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:38,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:38,766 INFO L87 Difference]: Start difference. First operand 137 states and 198 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:38,816 INFO L93 Difference]: Finished difference Result 274 states and 398 transitions. [2022-11-03 04:01:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:38,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:38,818 INFO L225 Difference]: With dead ends: 274 [2022-11-03 04:01:38,818 INFO L226 Difference]: Without dead ends: 153 [2022-11-03 04:01:38,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:38,822 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 22 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:38,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 672 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-11-03 04:01:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-03 04:01:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-03 04:01:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4342105263157894) internal successors, (218), 152 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 218 transitions. [2022-11-03 04:01:38,836 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 218 transitions. Word has length 124 [2022-11-03 04:01:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:38,838 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 218 transitions. [2022-11-03 04:01:38,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 218 transitions. [2022-11-03 04:01:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:38,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:38,847 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] [2022-11-03 04:01:38,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:39,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:39,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:39,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:39,064 INFO L85 PathProgramCache]: Analyzing trace with hash -359825, now seen corresponding path program 1 times [2022-11-03 04:01:39,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:39,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754589563] [2022-11-03 04:01:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:39,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:39,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:39,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 04:01:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:39,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:39,746 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 04:01:39,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:39,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:39,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754589563] [2022-11-03 04:01:39,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754589563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:39,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:39,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160150724] [2022-11-03 04:01:39,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:39,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:39,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:39,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:39,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:39,750 INFO L87 Difference]: Start difference. First operand 153 states and 218 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:39,853 INFO L93 Difference]: Finished difference Result 499 states and 731 transitions. [2022-11-03 04:01:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:39,857 INFO L225 Difference]: With dead ends: 499 [2022-11-03 04:01:39,857 INFO L226 Difference]: Without dead ends: 378 [2022-11-03 04:01:39,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 04:01:39,862 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 469 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:39,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 693 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-03 04:01:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 163. [2022-11-03 04:01:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.4320987654320987) internal successors, (232), 162 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 232 transitions. [2022-11-03 04:01:39,879 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 232 transitions. Word has length 124 [2022-11-03 04:01:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:39,880 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 232 transitions. [2022-11-03 04:01:39,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 232 transitions. [2022-11-03 04:01:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:39,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:39,883 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] [2022-11-03 04:01:39,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:40,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:40,103 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1030681073, now seen corresponding path program 1 times [2022-11-03 04:01:40,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:40,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821945387] [2022-11-03 04:01:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:40,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:40,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:40,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:40,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:01:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 04:01:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:40,908 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 04:01:40,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:40,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:40,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821945387] [2022-11-03 04:01:40,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821945387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:40,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:40,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:40,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036957035] [2022-11-03 04:01:40,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:40,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:40,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:40,912 INFO L87 Difference]: Start difference. First operand 163 states and 232 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:41,112 INFO L93 Difference]: Finished difference Result 524 states and 765 transitions. [2022-11-03 04:01:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:41,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:41,115 INFO L225 Difference]: With dead ends: 524 [2022-11-03 04:01:41,115 INFO L226 Difference]: Without dead ends: 403 [2022-11-03 04:01:41,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 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 04:01:41,116 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 675 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:41,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1013 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-03 04:01:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 165. [2022-11-03 04:01:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4268292682926829) internal successors, (234), 164 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 234 transitions. [2022-11-03 04:01:41,128 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 234 transitions. Word has length 124 [2022-11-03 04:01:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:41,129 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 234 transitions. [2022-11-03 04:01:41,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 234 transitions. [2022-11-03 04:01:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:41,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:41,133 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] [2022-11-03 04:01:41,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:41,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:41,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1663215117, now seen corresponding path program 1 times [2022-11-03 04:01:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:41,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593773803] [2022-11-03 04:01:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:41,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:41,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:01:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:42,009 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 04:01:42,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:42,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593773803] [2022-11-03 04:01:42,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593773803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:42,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:42,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:42,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997732341] [2022-11-03 04:01:42,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:42,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:42,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:42,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:42,013 INFO L87 Difference]: Start difference. First operand 165 states and 234 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:42,173 INFO L93 Difference]: Finished difference Result 418 states and 608 transitions. [2022-11-03 04:01:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:42,175 INFO L225 Difference]: With dead ends: 418 [2022-11-03 04:01:42,175 INFO L226 Difference]: Without dead ends: 297 [2022-11-03 04:01:42,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 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 04:01:42,177 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 489 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:42,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 731 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-03 04:01:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 177. [2022-11-03 04:01:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4261363636363635) internal successors, (251), 176 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 251 transitions. [2022-11-03 04:01:42,184 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 251 transitions. Word has length 124 [2022-11-03 04:01:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:42,185 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 251 transitions. [2022-11-03 04:01:42,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 251 transitions. [2022-11-03 04:01:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:42,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:42,187 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] [2022-11-03 04:01:42,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-03 04:01:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:42,406 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash 755269361, now seen corresponding path program 1 times [2022-11-03 04:01:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:42,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109704960] [2022-11-03 04:01:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:42,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:42,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:42,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:42,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:01:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:42,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:43,148 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 04:01:43,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:43,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:43,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109704960] [2022-11-03 04:01:43,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109704960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:43,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:43,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:43,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881712043] [2022-11-03 04:01:43,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:43,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:43,152 INFO L87 Difference]: Start difference. First operand 177 states and 251 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:43,263 INFO L93 Difference]: Finished difference Result 499 states and 728 transitions. [2022-11-03 04:01:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:43,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:43,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:43,266 INFO L225 Difference]: With dead ends: 499 [2022-11-03 04:01:43,266 INFO L226 Difference]: Without dead ends: 378 [2022-11-03 04:01:43,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 04:01:43,268 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 401 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:43,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 681 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-03 04:01:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 189. [2022-11-03 04:01:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.425531914893617) internal successors, (268), 188 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 268 transitions. [2022-11-03 04:01:43,276 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 268 transitions. Word has length 124 [2022-11-03 04:01:43,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:43,277 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 268 transitions. [2022-11-03 04:01:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 268 transitions. [2022-11-03 04:01:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:43,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:43,279 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] [2022-11-03 04:01:43,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-03 04:01:43,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:43,497 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1155773197, now seen corresponding path program 1 times [2022-11-03 04:01:43,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:43,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528442693] [2022-11-03 04:01:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:43,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:43,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:43,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:43,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 04:01:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:44,291 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 04:01:44,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:44,292 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:44,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528442693] [2022-11-03 04:01:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528442693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:44,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:44,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510797646] [2022-11-03 04:01:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:44,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:44,294 INFO L87 Difference]: Start difference. First operand 189 states and 268 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:44,327 INFO L93 Difference]: Finished difference Result 342 states and 491 transitions. [2022-11-03 04:01:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:44,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:44,330 INFO L225 Difference]: With dead ends: 342 [2022-11-03 04:01:44,330 INFO L226 Difference]: Without dead ends: 221 [2022-11-03 04:01:44,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:44,331 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 70 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:44,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 783 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-11-03 04:01:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-03 04:01:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-11-03 04:01:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4136363636363636) internal successors, (311), 220 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2022-11-03 04:01:44,338 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 124 [2022-11-03 04:01:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:44,338 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2022-11-03 04:01:44,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2022-11-03 04:01:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:44,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:44,340 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] [2022-11-03 04:01:44,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:44,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:44,556 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash -188422543, now seen corresponding path program 1 times [2022-11-03 04:01:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:44,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662788177] [2022-11-03 04:01:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:44,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:44,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:44,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:01:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:44,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:45,425 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 04:01:45,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:45,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:45,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662788177] [2022-11-03 04:01:45,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662788177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:45,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:45,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:45,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919902188] [2022-11-03 04:01:45,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:45,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:45,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:45,428 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:45,464 INFO L93 Difference]: Finished difference Result 360 states and 517 transitions. [2022-11-03 04:01:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:45,467 INFO L225 Difference]: With dead ends: 360 [2022-11-03 04:01:45,467 INFO L226 Difference]: Without dead ends: 239 [2022-11-03 04:01:45,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:45,468 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 98 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:45,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 764 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 63 Unchecked, 0.0s Time] [2022-11-03 04:01:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-03 04:01:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-11-03 04:01:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.415966386554622) internal successors, (337), 238 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 337 transitions. [2022-11-03 04:01:45,476 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 337 transitions. Word has length 124 [2022-11-03 04:01:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:45,477 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 337 transitions. [2022-11-03 04:01:45,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 337 transitions. [2022-11-03 04:01:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:45,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:45,479 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] [2022-11-03 04:01:45,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:45,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:45,706 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash -632323217, now seen corresponding path program 1 times [2022-11-03 04:01:45,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:45,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049890108] [2022-11-03 04:01:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:45,710 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:45,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:01:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:46,336 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 04:01:46,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:46,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049890108] [2022-11-03 04:01:46,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049890108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:46,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:46,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991132878] [2022-11-03 04:01:46,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:46,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:46,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:46,339 INFO L87 Difference]: Start difference. First operand 239 states and 337 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:46,449 INFO L93 Difference]: Finished difference Result 574 states and 831 transitions. [2022-11-03 04:01:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:46,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:46,452 INFO L225 Difference]: With dead ends: 574 [2022-11-03 04:01:46,453 INFO L226 Difference]: Without dead ends: 453 [2022-11-03 04:01:46,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 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 04:01:46,454 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 534 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:46,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 957 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-03 04:01:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 269. [2022-11-03 04:01:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.421641791044776) internal successors, (381), 268 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 381 transitions. [2022-11-03 04:01:46,463 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 381 transitions. Word has length 124 [2022-11-03 04:01:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:46,464 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 381 transitions. [2022-11-03 04:01:46,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:46,464 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 381 transitions. [2022-11-03 04:01:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:46,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:46,467 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] [2022-11-03 04:01:46,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:46,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:46,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:46,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1529716495, now seen corresponding path program 1 times [2022-11-03 04:01:46,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:46,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140347902] [2022-11-03 04:01:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:46,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:46,686 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:46,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 04:01:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 04:01:47,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:47,473 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 04:01:47,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:47,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:47,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140347902] [2022-11-03 04:01:47,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140347902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:47,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:47,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:47,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281709441] [2022-11-03 04:01:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:47,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:47,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:47,476 INFO L87 Difference]: Start difference. First operand 269 states and 381 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:47,640 INFO L93 Difference]: Finished difference Result 574 states and 830 transitions. [2022-11-03 04:01:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:47,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:47,643 INFO L225 Difference]: With dead ends: 574 [2022-11-03 04:01:47,643 INFO L226 Difference]: Without dead ends: 453 [2022-11-03 04:01:47,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 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 04:01:47,645 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 527 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:47,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 925 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-03 04:01:47,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 271. [2022-11-03 04:01:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.4185185185185185) internal successors, (383), 270 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 383 transitions. [2022-11-03 04:01:47,655 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 383 transitions. Word has length 124 [2022-11-03 04:01:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:47,656 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 383 transitions. [2022-11-03 04:01:47,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 383 transitions. [2022-11-03 04:01:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:47,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:47,658 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] [2022-11-03 04:01:47,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:47,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:47,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:47,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1106069773, now seen corresponding path program 1 times [2022-11-03 04:01:47,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:47,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559833014] [2022-11-03 04:01:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:47,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:47,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:47,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:01:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:01:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:48,684 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 04:01:48,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:48,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:48,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559833014] [2022-11-03 04:01:48,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559833014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:48,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:48,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:48,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960878706] [2022-11-03 04:01:48,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:48,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:48,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:48,688 INFO L87 Difference]: Start difference. First operand 271 states and 383 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:48,916 INFO L93 Difference]: Finished difference Result 514 states and 742 transitions. [2022-11-03 04:01:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:48,919 INFO L225 Difference]: With dead ends: 514 [2022-11-03 04:01:48,919 INFO L226 Difference]: Without dead ends: 393 [2022-11-03 04:01:48,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 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 04:01:48,920 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 433 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:48,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 768 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-03 04:01:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 273. [2022-11-03 04:01:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.4154411764705883) internal successors, (385), 272 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 385 transitions. [2022-11-03 04:01:48,945 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 385 transitions. Word has length 124 [2022-11-03 04:01:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:48,945 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 385 transitions. [2022-11-03 04:01:48,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 385 transitions. [2022-11-03 04:01:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:48,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:48,948 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] [2022-11-03 04:01:48,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:49,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 739297393, now seen corresponding path program 1 times [2022-11-03 04:01:49,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:49,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063523578] [2022-11-03 04:01:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:49,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:49,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:49,174 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:49,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:01:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:49,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:50,184 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 04:01:50,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:50,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:50,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063523578] [2022-11-03 04:01:50,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063523578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:50,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:50,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:50,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093095422] [2022-11-03 04:01:50,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:50,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:50,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:50,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:50,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:50,190 INFO L87 Difference]: Start difference. First operand 273 states and 385 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:50,231 INFO L93 Difference]: Finished difference Result 426 states and 609 transitions. [2022-11-03 04:01:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:50,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:50,234 INFO L225 Difference]: With dead ends: 426 [2022-11-03 04:01:50,234 INFO L226 Difference]: Without dead ends: 305 [2022-11-03 04:01:50,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:50,238 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 145 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:50,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 738 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-11-03 04:01:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-03 04:01:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-11-03 04:01:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.4111842105263157) internal successors, (429), 304 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 429 transitions. [2022-11-03 04:01:50,247 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 429 transitions. Word has length 124 [2022-11-03 04:01:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:50,248 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 429 transitions. [2022-11-03 04:01:50,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 429 transitions. [2022-11-03 04:01:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:50,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:50,250 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] [2022-11-03 04:01:50,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:50,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:50,468 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash 316595567, now seen corresponding path program 1 times [2022-11-03 04:01:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:50,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719352812] [2022-11-03 04:01:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:50,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:50,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:50,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:50,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:01:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:50,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:51,465 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 04:01:51,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:51,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:51,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719352812] [2022-11-03 04:01:51,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719352812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:51,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:51,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:51,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823322191] [2022-11-03 04:01:51,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:51,468 INFO L87 Difference]: Start difference. First operand 305 states and 429 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:51,519 INFO L93 Difference]: Finished difference Result 440 states and 629 transitions. [2022-11-03 04:01:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:51,522 INFO L225 Difference]: With dead ends: 440 [2022-11-03 04:01:51,522 INFO L226 Difference]: Without dead ends: 319 [2022-11-03 04:01:51,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:51,523 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 125 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:51,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 845 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 04:01:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-03 04:01:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-11-03 04:01:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.4119496855345912) internal successors, (449), 318 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 449 transitions. [2022-11-03 04:01:51,532 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 449 transitions. Word has length 124 [2022-11-03 04:01:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:51,533 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 449 transitions. [2022-11-03 04:01:51,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 449 transitions. [2022-11-03 04:01:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:51,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:51,535 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] [2022-11-03 04:01:51,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:51,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:51,748 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1458411795, now seen corresponding path program 1 times [2022-11-03 04:01:51,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:51,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43285959] [2022-11-03 04:01:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:51,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:51,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:51,751 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:51,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:01:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:01:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:52,707 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 04:01:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:53,390 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 04:01:53,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43285959] [2022-11-03 04:01:53,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43285959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304632483] [2022-11-03 04:01:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:53,392 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:53,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:53,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:53,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 04:01:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:01:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:54,650 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 04:01:54,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:55,225 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 04:01:55,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304632483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569031948] [2022-11-03 04:01:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:55,229 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:55,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 04:01:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:01:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:56,119 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 04:01:56,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:56,724 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 04:01:56,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569031948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:56,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:56,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 04:01:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100581099] [2022-11-03 04:01:56,730 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:56,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 04:01:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:56,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 04:01:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:56,733 INFO L87 Difference]: Start difference. First operand 319 states and 449 transitions. Second operand has 16 states, 16 states have (on average 15.625) internal successors, (250), 16 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:57,420 INFO L93 Difference]: Finished difference Result 715 states and 1036 transitions. [2022-11-03 04:01:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:01:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.625) internal successors, (250), 16 states have internal predecessors, (250), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:57,424 INFO L225 Difference]: With dead ends: 715 [2022-11-03 04:01:57,424 INFO L226 Difference]: Without dead ends: 713 [2022-11-03 04:01:57,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 722 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:01:57,426 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 3822 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3822 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:57,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3822 Valid, 2383 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 218 Invalid, 0 Unknown, 428 Unchecked, 0.3s Time] [2022-11-03 04:01:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-03 04:01:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 555. [2022-11-03 04:01:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4458483754512634) internal successors, (801), 554 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 801 transitions. [2022-11-03 04:01:57,446 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 801 transitions. Word has length 124 [2022-11-03 04:01:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:57,447 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 801 transitions. [2022-11-03 04:01:57,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.625) internal successors, (250), 16 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 801 transitions. [2022-11-03 04:01:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:57,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:57,449 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] [2022-11-03 04:01:57,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:57,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:57,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:58,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:58,055 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1195248377, now seen corresponding path program 1 times [2022-11-03 04:01:58,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:58,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769741934] [2022-11-03 04:01:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:58,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:58,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:58,058 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:58,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 04:01:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:58,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:58,541 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 04:01:58,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:58,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:58,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769741934] [2022-11-03 04:01:58,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769741934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:58,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:58,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:58,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112124739] [2022-11-03 04:01:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:58,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:58,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:58,544 INFO L87 Difference]: Start difference. First operand 555 states and 801 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:58,805 INFO L93 Difference]: Finished difference Result 1465 states and 2132 transitions. [2022-11-03 04:01:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:01:58,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:58,810 INFO L225 Difference]: With dead ends: 1465 [2022-11-03 04:01:58,810 INFO L226 Difference]: Without dead ends: 1034 [2022-11-03 04:01:58,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:01:58,812 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 335 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:58,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1774 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-11-03 04:01:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-03 04:01:58,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 555. [2022-11-03 04:01:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.444043321299639) internal successors, (800), 554 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 800 transitions. [2022-11-03 04:01:58,833 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 800 transitions. Word has length 124 [2022-11-03 04:01:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:58,834 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 800 transitions. [2022-11-03 04:01:58,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:58,834 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 800 transitions. [2022-11-03 04:01:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:58,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:58,836 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] [2022-11-03 04:01:58,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:59,051 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:59,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1372573957, now seen corresponding path program 1 times [2022-11-03 04:01:59,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:59,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666955053] [2022-11-03 04:01:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:59,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:59,054 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:59,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 04:01:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:59,514 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 04:01:59,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:59,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:59,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666955053] [2022-11-03 04:01:59,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666955053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:59,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:59,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999583976] [2022-11-03 04:01:59,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:59,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:59,519 INFO L87 Difference]: Start difference. First operand 555 states and 800 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:59,770 INFO L93 Difference]: Finished difference Result 1435 states and 2090 transitions. [2022-11-03 04:01:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:01:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:59,774 INFO L225 Difference]: With dead ends: 1435 [2022-11-03 04:01:59,774 INFO L226 Difference]: Without dead ends: 1010 [2022-11-03 04:01:59,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:01:59,776 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 325 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:59,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1743 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-11-03 04:01:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-11-03 04:01:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 555. [2022-11-03 04:01:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4422382671480145) internal successors, (799), 554 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 799 transitions. [2022-11-03 04:01:59,792 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 799 transitions. Word has length 124 [2022-11-03 04:01:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:59,793 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 799 transitions. [2022-11-03 04:01:59,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 799 transitions. [2022-11-03 04:01:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:59,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:59,795 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] [2022-11-03 04:01:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:00,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,011 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:00,011 INFO L85 PathProgramCache]: Analyzing trace with hash 780532861, now seen corresponding path program 1 times [2022-11-03 04:02:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:00,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763592012] [2022-11-03 04:02:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:00,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:00,015 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:00,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:02:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:00,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:00,534 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 04:02:00,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:00,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763592012] [2022-11-03 04:02:00,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763592012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:00,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:00,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158358375] [2022-11-03 04:02:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:00,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:00,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:00,536 INFO L87 Difference]: Start difference. First operand 555 states and 799 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:00,640 INFO L93 Difference]: Finished difference Result 1369 states and 1992 transitions. [2022-11-03 04:02:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:00,644 INFO L225 Difference]: With dead ends: 1369 [2022-11-03 04:02:00,645 INFO L226 Difference]: Without dead ends: 950 [2022-11-03 04:02:00,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:00,647 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 170 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:00,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1122 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-03 04:02:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-11-03 04:02:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 555. [2022-11-03 04:02:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.44043321299639) internal successors, (798), 554 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 04:02:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 798 transitions. [2022-11-03 04:02:00,673 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 798 transitions. Word has length 124 [2022-11-03 04:02:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:00,673 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 798 transitions. [2022-11-03 04:02:00,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 798 transitions. [2022-11-03 04:02:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:00,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:00,675 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] [2022-11-03 04:02:00,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:00,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,892 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash -526609537, now seen corresponding path program 1 times [2022-11-03 04:02:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:00,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405638619] [2022-11-03 04:02:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:00,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:00,895 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:00,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:02:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:01,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:01,371 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 04:02:01,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:01,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405638619] [2022-11-03 04:02:01,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405638619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:01,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:01,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708756577] [2022-11-03 04:02:01,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:01,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:01,375 INFO L87 Difference]: Start difference. First operand 555 states and 798 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:01,606 INFO L93 Difference]: Finished difference Result 1365 states and 1988 transitions. [2022-11-03 04:02:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:01,610 INFO L225 Difference]: With dead ends: 1365 [2022-11-03 04:02:01,610 INFO L226 Difference]: Without dead ends: 954 [2022-11-03 04:02:01,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:01,612 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 301 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:01,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1921 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-11-03 04:02:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-03 04:02:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 555. [2022-11-03 04:02:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4386281588447654) internal successors, (797), 554 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 797 transitions. [2022-11-03 04:02:01,629 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 797 transitions. Word has length 124 [2022-11-03 04:02:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:01,630 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 797 transitions. [2022-11-03 04:02:01,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 797 transitions. [2022-11-03 04:02:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:01,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:01,631 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] [2022-11-03 04:02:01,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 04:02:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:01,848 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1410118527, now seen corresponding path program 1 times [2022-11-03 04:02:01,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139686215] [2022-11-03 04:02:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:01,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:01,852 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:01,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 04:02:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:02,329 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 04:02:02,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:02,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:02,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139686215] [2022-11-03 04:02:02,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139686215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:02,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:02,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:02,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720960419] [2022-11-03 04:02:02,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:02,332 INFO L87 Difference]: Start difference. First operand 555 states and 797 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:02,495 INFO L93 Difference]: Finished difference Result 1345 states and 1957 transitions. [2022-11-03 04:02:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:02,500 INFO L225 Difference]: With dead ends: 1345 [2022-11-03 04:02:02,500 INFO L226 Difference]: Without dead ends: 938 [2022-11-03 04:02:02,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:02,502 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 423 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:02,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1646 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-11-03 04:02:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-11-03 04:02:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 555. [2022-11-03 04:02:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4368231046931408) internal successors, (796), 554 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 04:02:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 796 transitions. [2022-11-03 04:02:02,519 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 796 transitions. Word has length 124 [2022-11-03 04:02:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:02,520 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 796 transitions. [2022-11-03 04:02:02,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 796 transitions. [2022-11-03 04:02:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:02,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:02,522 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] [2022-11-03 04:02:02,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:02,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:02,738 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2114115203, now seen corresponding path program 1 times [2022-11-03 04:02:02,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:02,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669089482] [2022-11-03 04:02:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:02,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:02,742 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:02,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:02:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:03,212 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 04:02:03,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:03,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669089482] [2022-11-03 04:02:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669089482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:03,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:03,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230282299] [2022-11-03 04:02:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:03,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:03,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:03,216 INFO L87 Difference]: Start difference. First operand 555 states and 796 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:03,329 INFO L93 Difference]: Finished difference Result 1269 states and 1845 transitions. [2022-11-03 04:02:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:03,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:03,333 INFO L225 Difference]: With dead ends: 1269 [2022-11-03 04:02:03,333 INFO L226 Difference]: Without dead ends: 870 [2022-11-03 04:02:03,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:03,335 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 187 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:03,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1137 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-11-03 04:02:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-11-03 04:02:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 555. [2022-11-03 04:02:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4350180505415162) internal successors, (795), 554 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 795 transitions. [2022-11-03 04:02:03,354 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 795 transitions. Word has length 124 [2022-11-03 04:02:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:03,354 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 795 transitions. [2022-11-03 04:02:03,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 795 transitions. [2022-11-03 04:02:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:03,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:03,356 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] [2022-11-03 04:02:03,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:03,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1056277125, now seen corresponding path program 1 times [2022-11-03 04:02:03,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:03,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678775594] [2022-11-03 04:02:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:03,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:03,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:03,574 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:03,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 04:02:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:04,155 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 04:02:04,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:04,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678775594] [2022-11-03 04:02:04,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678775594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:04,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:04,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:04,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294501531] [2022-11-03 04:02:04,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:04,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:04,157 INFO L87 Difference]: Start difference. First operand 555 states and 795 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:04,261 INFO L93 Difference]: Finished difference Result 1239 states and 1799 transitions. [2022-11-03 04:02:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:04,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:04,266 INFO L225 Difference]: With dead ends: 1239 [2022-11-03 04:02:04,266 INFO L226 Difference]: Without dead ends: 846 [2022-11-03 04:02:04,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:04,268 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 165 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:04,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1121 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-03 04:02:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-03 04:02:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 555. [2022-11-03 04:02:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4332129963898916) internal successors, (794), 554 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 04:02:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 794 transitions. [2022-11-03 04:02:04,288 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 794 transitions. Word has length 124 [2022-11-03 04:02:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:04,288 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 794 transitions. [2022-11-03 04:02:04,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 794 transitions. [2022-11-03 04:02:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:04,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:04,290 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] [2022-11-03 04:02:04,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:04,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:04,507 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1504585721, now seen corresponding path program 1 times [2022-11-03 04:02:04,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591383097] [2022-11-03 04:02:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:04,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:04,510 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:04,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 04:02:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:04,945 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 04:02:04,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:04,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:04,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591383097] [2022-11-03 04:02:04,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591383097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:04,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:04,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013986705] [2022-11-03 04:02:04,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:04,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:04,949 INFO L87 Difference]: Start difference. First operand 555 states and 794 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:05,056 INFO L93 Difference]: Finished difference Result 1209 states and 1756 transitions. [2022-11-03 04:02:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:05,060 INFO L225 Difference]: With dead ends: 1209 [2022-11-03 04:02:05,060 INFO L226 Difference]: Without dead ends: 822 [2022-11-03 04:02:05,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:05,061 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 162 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:05,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1334 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-11-03 04:02:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-11-03 04:02:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 555. [2022-11-03 04:02:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.431407942238267) internal successors, (793), 554 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 793 transitions. [2022-11-03 04:02:05,118 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 793 transitions. Word has length 124 [2022-11-03 04:02:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:05,119 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 793 transitions. [2022-11-03 04:02:05,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 793 transitions. [2022-11-03 04:02:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:05,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:05,121 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] [2022-11-03 04:02:05,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:05,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:05,337 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1997211895, now seen corresponding path program 1 times [2022-11-03 04:02:05,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:05,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616834623] [2022-11-03 04:02:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:05,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:05,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:05,341 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:05,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:02:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:05,833 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 04:02:05,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:05,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:05,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616834623] [2022-11-03 04:02:05,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616834623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:05,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:05,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:05,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144228168] [2022-11-03 04:02:05,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:05,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:05,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:05,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:05,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:05,835 INFO L87 Difference]: Start difference. First operand 555 states and 793 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:06,070 INFO L93 Difference]: Finished difference Result 1225 states and 1778 transitions. [2022-11-03 04:02:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:06,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:06,075 INFO L225 Difference]: With dead ends: 1225 [2022-11-03 04:02:06,075 INFO L226 Difference]: Without dead ends: 842 [2022-11-03 04:02:06,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:06,077 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 253 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:06,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1747 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-11-03 04:02:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-03 04:02:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 555. [2022-11-03 04:02:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4296028880866427) internal successors, (792), 554 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 04:02:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 792 transitions. [2022-11-03 04:02:06,094 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 792 transitions. Word has length 124 [2022-11-03 04:02:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:06,094 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 792 transitions. [2022-11-03 04:02:06,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 792 transitions. [2022-11-03 04:02:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:06,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:06,096 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] [2022-11-03 04:02:06,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 04:02:06,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:06,313 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash 611575563, now seen corresponding path program 1 times [2022-11-03 04:02:06,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:06,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392568492] [2022-11-03 04:02:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:06,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:06,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:06,316 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:06,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 04:02:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:06,861 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 04:02:06,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:06,861 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:06,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392568492] [2022-11-03 04:02:06,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392568492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:06,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:06,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235821172] [2022-11-03 04:02:06,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:06,863 INFO L87 Difference]: Start difference. First operand 555 states and 792 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:06,996 INFO L93 Difference]: Finished difference Result 1169 states and 1694 transitions. [2022-11-03 04:02:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:07,001 INFO L225 Difference]: With dead ends: 1169 [2022-11-03 04:02:07,001 INFO L226 Difference]: Without dead ends: 790 [2022-11-03 04:02:07,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:07,003 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 175 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:07,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1114 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-03 04:02:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-03 04:02:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 555. [2022-11-03 04:02:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4277978339350181) internal successors, (791), 554 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 791 transitions. [2022-11-03 04:02:07,043 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 791 transitions. Word has length 124 [2022-11-03 04:02:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:07,043 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 791 transitions. [2022-11-03 04:02:07,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 791 transitions. [2022-11-03 04:02:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:07,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:07,045 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] [2022-11-03 04:02:07,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:07,261 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1721817075, now seen corresponding path program 1 times [2022-11-03 04:02:07,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409040206] [2022-11-03 04:02:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:07,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:07,264 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:07,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 04:02:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:07,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:07,747 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 04:02:07,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:07,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:07,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409040206] [2022-11-03 04:02:07,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409040206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:07,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:07,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:07,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894454974] [2022-11-03 04:02:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:07,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:07,750 INFO L87 Difference]: Start difference. First operand 555 states and 791 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:07,945 INFO L93 Difference]: Finished difference Result 1195 states and 1731 transitions. [2022-11-03 04:02:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:07,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:07,950 INFO L225 Difference]: With dead ends: 1195 [2022-11-03 04:02:07,950 INFO L226 Difference]: Without dead ends: 818 [2022-11-03 04:02:07,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:07,951 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 230 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:07,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1504 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-03 04:02:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-11-03 04:02:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 555. [2022-11-03 04:02:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4259927797833936) internal successors, (790), 554 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 04:02:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 790 transitions. [2022-11-03 04:02:07,967 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 790 transitions. Word has length 124 [2022-11-03 04:02:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:07,967 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 790 transitions. [2022-11-03 04:02:07,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 790 transitions. [2022-11-03 04:02:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:07,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:07,969 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] [2022-11-03 04:02:07,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:08,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:08,183 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1161117297, now seen corresponding path program 1 times [2022-11-03 04:02:08,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:08,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87239086] [2022-11-03 04:02:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:08,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:08,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:08,186 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:08,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 04:02:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:08,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:08,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:08,671 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 04:02:08,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:08,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:08,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87239086] [2022-11-03 04:02:08,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87239086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:08,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:08,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:08,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554649866] [2022-11-03 04:02:08,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:08,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:08,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:08,673 INFO L87 Difference]: Start difference. First operand 555 states and 790 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:08,776 INFO L93 Difference]: Finished difference Result 1149 states and 1662 transitions. [2022-11-03 04:02:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:08,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:08,780 INFO L225 Difference]: With dead ends: 1149 [2022-11-03 04:02:08,780 INFO L226 Difference]: Without dead ends: 774 [2022-11-03 04:02:08,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:08,781 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 179 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:08,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1115 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-11-03 04:02:08,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-03 04:02:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 555. [2022-11-03 04:02:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.424187725631769) internal successors, (789), 554 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 789 transitions. [2022-11-03 04:02:08,797 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 789 transitions. Word has length 124 [2022-11-03 04:02:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:08,797 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 789 transitions. [2022-11-03 04:02:08,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 789 transitions. [2022-11-03 04:02:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:08,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:08,799 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] [2022-11-03 04:02:08,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:09,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:09,014 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash 99799953, now seen corresponding path program 1 times [2022-11-03 04:02:09,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:09,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045645832] [2022-11-03 04:02:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:09,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:09,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:09,017 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:09,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 04:02:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:09,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:09,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:09,571 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 04:02:09,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:09,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:09,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045645832] [2022-11-03 04:02:09,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045645832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:09,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:09,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:09,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317921847] [2022-11-03 04:02:09,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:09,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:09,574 INFO L87 Difference]: Start difference. First operand 555 states and 789 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:09,800 INFO L93 Difference]: Finished difference Result 1155 states and 1670 transitions. [2022-11-03 04:02:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:09,804 INFO L225 Difference]: With dead ends: 1155 [2022-11-03 04:02:09,804 INFO L226 Difference]: Without dead ends: 786 [2022-11-03 04:02:09,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:09,806 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 212 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:09,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1464 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-03 04:02:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-11-03 04:02:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 555. [2022-11-03 04:02:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4223826714801444) internal successors, (788), 554 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 04:02:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 788 transitions. [2022-11-03 04:02:09,835 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 788 transitions. Word has length 124 [2022-11-03 04:02:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:09,836 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 788 transitions. [2022-11-03 04:02:09,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 788 transitions. [2022-11-03 04:02:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:09,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:09,838 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] [2022-11-03 04:02:09,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:10,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:10,050 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1928786157, now seen corresponding path program 1 times [2022-11-03 04:02:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236234048] [2022-11-03 04:02:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:10,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:10,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:10,053 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:10,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 04:02:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:10,598 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 04:02:10,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:10,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236234048] [2022-11-03 04:02:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236234048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:10,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:10,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802346563] [2022-11-03 04:02:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:10,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:10,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:10,601 INFO L87 Difference]: Start difference. First operand 555 states and 788 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:10,739 INFO L93 Difference]: Finished difference Result 1099 states and 1586 transitions. [2022-11-03 04:02:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:10,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:10,743 INFO L225 Difference]: With dead ends: 1099 [2022-11-03 04:02:10,743 INFO L226 Difference]: Without dead ends: 734 [2022-11-03 04:02:10,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:10,744 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 154 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:10,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1296 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-11-03 04:02:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-11-03 04:02:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 555. [2022-11-03 04:02:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4205776173285198) internal successors, (787), 554 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 787 transitions. [2022-11-03 04:02:10,762 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 787 transitions. Word has length 124 [2022-11-03 04:02:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:10,762 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 787 transitions. [2022-11-03 04:02:10,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 787 transitions. [2022-11-03 04:02:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:10,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:10,764 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] [2022-11-03 04:02:10,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:10,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:10,981 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2013092757, now seen corresponding path program 1 times [2022-11-03 04:02:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:10,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505363974] [2022-11-03 04:02:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:10,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:10,983 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:10,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 04:02:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:11,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:11,477 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 04:02:11,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:11,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:11,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505363974] [2022-11-03 04:02:11,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505363974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:11,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:11,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:11,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758266217] [2022-11-03 04:02:11,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:11,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:11,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:11,480 INFO L87 Difference]: Start difference. First operand 555 states and 787 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:11,678 INFO L93 Difference]: Finished difference Result 1087 states and 1572 transitions. [2022-11-03 04:02:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:11,680 INFO L225 Difference]: With dead ends: 1087 [2022-11-03 04:02:11,680 INFO L226 Difference]: Without dead ends: 730 [2022-11-03 04:02:11,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:11,681 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 204 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:11,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1569 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-11-03 04:02:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-11-03 04:02:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 557. [2022-11-03 04:02:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.419064748201439) internal successors, (789), 556 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 789 transitions. [2022-11-03 04:02:11,692 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 789 transitions. Word has length 124 [2022-11-03 04:02:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:11,693 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 789 transitions. [2022-11-03 04:02:11,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 789 transitions. [2022-11-03 04:02:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:11,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:11,694 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] [2022-11-03 04:02:11,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:11,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:11,905 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1622343017, now seen corresponding path program 1 times [2022-11-03 04:02:11,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:11,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139491804] [2022-11-03 04:02:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:11,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:11,907 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:11,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 04:02:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:12,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:12,448 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 04:02:12,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:12,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139491804] [2022-11-03 04:02:12,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139491804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:12,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:12,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503489193] [2022-11-03 04:02:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:12,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:12,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:12,452 INFO L87 Difference]: Start difference. First operand 557 states and 789 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:12,639 INFO L93 Difference]: Finished difference Result 1071 states and 1547 transitions. [2022-11-03 04:02:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:12,643 INFO L225 Difference]: With dead ends: 1071 [2022-11-03 04:02:12,643 INFO L226 Difference]: Without dead ends: 714 [2022-11-03 04:02:12,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:12,645 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 259 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:12,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1194 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-11-03 04:02:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-03 04:02:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 561. [2022-11-03 04:02:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.417857142857143) internal successors, (794), 560 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 04:02:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 794 transitions. [2022-11-03 04:02:12,689 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 794 transitions. Word has length 124 [2022-11-03 04:02:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:12,690 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 794 transitions. [2022-11-03 04:02:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 794 transitions. [2022-11-03 04:02:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:12,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:12,692 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] [2022-11-03 04:02:12,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:12,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:12,907 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1694729575, now seen corresponding path program 1 times [2022-11-03 04:02:12,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:12,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54800993] [2022-11-03 04:02:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:12,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:12,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:12,911 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:12,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 04:02:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:13,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:13,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:13,438 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 04:02:13,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:13,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54800993] [2022-11-03 04:02:13,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54800993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:13,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:13,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092818649] [2022-11-03 04:02:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:13,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:13,441 INFO L87 Difference]: Start difference. First operand 561 states and 794 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:13,652 INFO L93 Difference]: Finished difference Result 1055 states and 1522 transitions. [2022-11-03 04:02:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:13,654 INFO L225 Difference]: With dead ends: 1055 [2022-11-03 04:02:13,654 INFO L226 Difference]: Without dead ends: 698 [2022-11-03 04:02:13,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:13,655 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 190 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:13,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1517 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-11-03 04:02:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-03 04:02:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 565. [2022-11-03 04:02:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.4166666666666667) internal successors, (799), 564 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 799 transitions. [2022-11-03 04:02:13,670 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 799 transitions. Word has length 124 [2022-11-03 04:02:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:13,671 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 799 transitions. [2022-11-03 04:02:13,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 799 transitions. [2022-11-03 04:02:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:13,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:13,672 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] [2022-11-03 04:02:13,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 04:02:13,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:13,873 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash -308526181, now seen corresponding path program 1 times [2022-11-03 04:02:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:13,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062846185] [2022-11-03 04:02:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:13,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:13,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:13,876 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:13,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 04:02:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:14,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:14,422 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 04:02:14,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:14,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062846185] [2022-11-03 04:02:14,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062846185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:14,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:14,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219476602] [2022-11-03 04:02:14,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:14,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:14,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:14,424 INFO L87 Difference]: Start difference. First operand 565 states and 799 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:14,588 INFO L93 Difference]: Finished difference Result 1024 states and 1475 transitions. [2022-11-03 04:02:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:14,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:14,592 INFO L225 Difference]: With dead ends: 1024 [2022-11-03 04:02:14,592 INFO L226 Difference]: Without dead ends: 667 [2022-11-03 04:02:14,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:14,593 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 170 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:14,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1094 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-11-03 04:02:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-03 04:02:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 567. [2022-11-03 04:02:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.4151943462897527) internal successors, (801), 566 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 801 transitions. [2022-11-03 04:02:14,618 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 801 transitions. Word has length 124 [2022-11-03 04:02:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:14,619 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 801 transitions. [2022-11-03 04:02:14,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 801 transitions. [2022-11-03 04:02:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:14,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:14,621 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] [2022-11-03 04:02:14,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:14,835 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1614701853, now seen corresponding path program 1 times [2022-11-03 04:02:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:14,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102544969] [2022-11-03 04:02:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:14,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:14,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:14,838 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:14,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:02:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:15,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:15,413 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 04:02:15,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:15,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102544969] [2022-11-03 04:02:15,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102544969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:15,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:15,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:15,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358914204] [2022-11-03 04:02:15,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:15,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:15,416 INFO L87 Difference]: Start difference. First operand 567 states and 801 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:15,556 INFO L93 Difference]: Finished difference Result 1017 states and 1464 transitions. [2022-11-03 04:02:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:15,559 INFO L225 Difference]: With dead ends: 1017 [2022-11-03 04:02:15,559 INFO L226 Difference]: Without dead ends: 660 [2022-11-03 04:02:15,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:15,560 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 144 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:15,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1090 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-03 04:02:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-03 04:02:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 569. [2022-11-03 04:02:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.4137323943661972) internal successors, (803), 568 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 04:02:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 803 transitions. [2022-11-03 04:02:15,579 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 803 transitions. Word has length 124 [2022-11-03 04:02:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:15,579 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 803 transitions. [2022-11-03 04:02:15,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 803 transitions. [2022-11-03 04:02:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:15,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:15,581 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] [2022-11-03 04:02:15,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 04:02:15,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:15,794 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1755250463, now seen corresponding path program 1 times [2022-11-03 04:02:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:15,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160851460] [2022-11-03 04:02:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:15,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:15,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:15,798 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:15,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 04:02:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:16,350 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 04:02:16,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:16,350 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:16,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160851460] [2022-11-03 04:02:16,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160851460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:16,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:16,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:16,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630637641] [2022-11-03 04:02:16,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:16,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:16,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:16,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:16,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:16,353 INFO L87 Difference]: Start difference. First operand 569 states and 803 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:16,569 INFO L93 Difference]: Finished difference Result 1031 states and 1483 transitions. [2022-11-03 04:02:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:16,572 INFO L225 Difference]: With dead ends: 1031 [2022-11-03 04:02:16,572 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 04:02:16,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:16,573 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 156 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:16,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1315 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-03 04:02:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 04:02:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 571. [2022-11-03 04:02:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.412280701754386) internal successors, (805), 570 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 04:02:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 805 transitions. [2022-11-03 04:02:16,592 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 805 transitions. Word has length 124 [2022-11-03 04:02:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:16,593 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 805 transitions. [2022-11-03 04:02:16,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 805 transitions. [2022-11-03 04:02:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:16,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:16,594 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] [2022-11-03 04:02:16,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:16,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:16,812 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash -50187871, now seen corresponding path program 1 times [2022-11-03 04:02:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844802001] [2022-11-03 04:02:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:16,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:16,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:16,815 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:16,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 04:02:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:17,369 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 04:02:17,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:17,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:17,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844802001] [2022-11-03 04:02:17,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844802001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:17,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:17,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:17,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586383766] [2022-11-03 04:02:17,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:17,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:17,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:17,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:17,372 INFO L87 Difference]: Start difference. First operand 571 states and 805 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:17,581 INFO L93 Difference]: Finished difference Result 1015 states and 1459 transitions. [2022-11-03 04:02:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:17,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:17,583 INFO L225 Difference]: With dead ends: 1015 [2022-11-03 04:02:17,583 INFO L226 Difference]: Without dead ends: 658 [2022-11-03 04:02:17,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:17,584 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 146 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:17,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1453 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-03 04:02:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-03 04:02:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 575. [2022-11-03 04:02:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.411149825783972) internal successors, (810), 574 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 810 transitions. [2022-11-03 04:02:17,601 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 810 transitions. Word has length 124 [2022-11-03 04:02:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:17,601 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 810 transitions. [2022-11-03 04:02:17,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 810 transitions. [2022-11-03 04:02:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:17,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:17,603 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] [2022-11-03 04:02:17,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:17,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:17,818 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1739131613, now seen corresponding path program 1 times [2022-11-03 04:02:17,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:17,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099767991] [2022-11-03 04:02:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:17,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:17,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:17,821 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:17,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 04:02:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:18,394 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 04:02:18,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:18,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:18,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099767991] [2022-11-03 04:02:18,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099767991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:18,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:18,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:18,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30771832] [2022-11-03 04:02:18,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:18,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:18,397 INFO L87 Difference]: Start difference. First operand 575 states and 810 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:18,601 INFO L93 Difference]: Finished difference Result 999 states and 1434 transitions. [2022-11-03 04:02:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:18,604 INFO L225 Difference]: With dead ends: 999 [2022-11-03 04:02:18,604 INFO L226 Difference]: Without dead ends: 642 [2022-11-03 04:02:18,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:18,605 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 163 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:18,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1275 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-03 04:02:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-11-03 04:02:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 579. [2022-11-03 04:02:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.4100346020761245) internal successors, (815), 578 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 815 transitions. [2022-11-03 04:02:18,624 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 815 transitions. Word has length 124 [2022-11-03 04:02:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:18,625 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 815 transitions. [2022-11-03 04:02:18,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 815 transitions. [2022-11-03 04:02:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:18,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:18,627 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] [2022-11-03 04:02:18,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 04:02:18,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:18,845 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1275972005, now seen corresponding path program 1 times [2022-11-03 04:02:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:18,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722156638] [2022-11-03 04:02:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:18,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:18,847 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:18,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 04:02:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:19,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:19,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:19,475 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 04:02:19,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:19,475 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:19,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722156638] [2022-11-03 04:02:19,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722156638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:19,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:19,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448042243] [2022-11-03 04:02:19,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:19,477 INFO L87 Difference]: Start difference. First operand 579 states and 815 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:19,615 INFO L93 Difference]: Finished difference Result 975 states and 1398 transitions. [2022-11-03 04:02:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:19,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:19,619 INFO L225 Difference]: With dead ends: 975 [2022-11-03 04:02:19,619 INFO L226 Difference]: Without dead ends: 618 [2022-11-03 04:02:19,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:19,620 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 138 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:19,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1080 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-03 04:02:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-11-03 04:02:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 583. [2022-11-03 04:02:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.4089347079037802) internal successors, (820), 582 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 04:02:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 820 transitions. [2022-11-03 04:02:19,638 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 820 transitions. Word has length 124 [2022-11-03 04:02:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:19,639 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 820 transitions. [2022-11-03 04:02:19,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 820 transitions. [2022-11-03 04:02:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:19,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:19,640 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] [2022-11-03 04:02:19,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:19,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:19,854 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1977036583, now seen corresponding path program 1 times [2022-11-03 04:02:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:19,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794878548] [2022-11-03 04:02:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:19,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:19,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:19,857 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:19,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 04:02:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:20,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:20,478 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 04:02:20,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:20,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:20,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794878548] [2022-11-03 04:02:20,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794878548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:20,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:20,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:20,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061436600] [2022-11-03 04:02:20,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:20,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:20,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:20,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:20,482 INFO L87 Difference]: Start difference. First operand 583 states and 820 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:20,701 INFO L93 Difference]: Finished difference Result 975 states and 1396 transitions. [2022-11-03 04:02:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:20,705 INFO L225 Difference]: With dead ends: 975 [2022-11-03 04:02:20,706 INFO L226 Difference]: Without dead ends: 618 [2022-11-03 04:02:20,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:20,707 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 125 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:20,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1387 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-11-03 04:02:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-11-03 04:02:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 585. [2022-11-03 04:02:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.4075342465753424) internal successors, (822), 584 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 04:02:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 822 transitions. [2022-11-03 04:02:20,726 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 822 transitions. Word has length 124 [2022-11-03 04:02:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:20,727 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 822 transitions. [2022-11-03 04:02:20,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 822 transitions. [2022-11-03 04:02:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:20,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:20,729 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] [2022-11-03 04:02:20,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:20,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:20,946 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1637872343, now seen corresponding path program 1 times [2022-11-03 04:02:20,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:20,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747931154] [2022-11-03 04:02:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:20,949 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:20,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 04:02:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:21,580 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 04:02:21,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:21,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747931154] [2022-11-03 04:02:21,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747931154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:21,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:21,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385231197] [2022-11-03 04:02:21,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:21,585 INFO L87 Difference]: Start difference. First operand 585 states and 822 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:21,756 INFO L93 Difference]: Finished difference Result 959 states and 1373 transitions. [2022-11-03 04:02:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:21,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:21,760 INFO L225 Difference]: With dead ends: 959 [2022-11-03 04:02:21,760 INFO L226 Difference]: Without dead ends: 602 [2022-11-03 04:02:21,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:21,761 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 134 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:21,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1214 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-11-03 04:02:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-03 04:02:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 589. [2022-11-03 04:02:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.4064625850340136) internal successors, (827), 588 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 827 transitions. [2022-11-03 04:02:21,777 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 827 transitions. Word has length 124 [2022-11-03 04:02:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:21,777 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 827 transitions. [2022-11-03 04:02:21,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 827 transitions. [2022-11-03 04:02:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:21,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:21,779 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] [2022-11-03 04:02:21,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:21,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:21,993 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:21,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1636025301, now seen corresponding path program 1 times [2022-11-03 04:02:21,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:21,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277570505] [2022-11-03 04:02:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:21,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:21,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:21,996 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:22,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 04:02:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:02:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:22,916 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 04:02:22,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:23,580 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 04:02:23,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:23,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277570505] [2022-11-03 04:02:23,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277570505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:23,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61033623] [2022-11-03 04:02:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:23,581 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:23,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:23,582 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:23,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 04:02:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:24,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:02:24,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:24,796 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 04:02:24,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:25,346 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 04:02:25,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61033623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:25,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859283257] [2022-11-03 04:02:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:25,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:25,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:25,351 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:25,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 04:02:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:02:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:26,286 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 04:02:26,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:26,880 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 04:02:26,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859283257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:26,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:02:26,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 04:02:26,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394233742] [2022-11-03 04:02:26,881 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:26,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 04:02:26,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 04:02:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:26,883 INFO L87 Difference]: Start difference. First operand 589 states and 827 transitions. Second operand has 16 states, 16 states have (on average 15.625) internal successors, (250), 16 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:27,308 INFO L93 Difference]: Finished difference Result 834 states and 1188 transitions. [2022-11-03 04:02:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:02:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.625) internal successors, (250), 16 states have internal predecessors, (250), 0 states have call successors, (0), 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 124 [2022-11-03 04:02:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:27,311 INFO L225 Difference]: With dead ends: 834 [2022-11-03 04:02:27,311 INFO L226 Difference]: Without dead ends: 832 [2022-11-03 04:02:27,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 722 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:02:27,313 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 1564 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:27,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 2660 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-11-03 04:02:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-03 04:02:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 592. [2022-11-03 04:02:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 1.404399323181049) internal successors, (830), 591 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 04:02:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 830 transitions. [2022-11-03 04:02:27,336 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 830 transitions. Word has length 124 [2022-11-03 04:02:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:27,337 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 830 transitions. [2022-11-03 04:02:27,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.625) internal successors, (250), 16 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 830 transitions. [2022-11-03 04:02:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:27,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:27,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:27,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:27,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 04:02:27,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-03 04:02:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:27,955 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash 712361223, now seen corresponding path program 1 times [2022-11-03 04:02:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:27,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423416807] [2022-11-03 04:02:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:27,958 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 04:02:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:28,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:29,120 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423416807] [2022-11-03 04:02:29,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423416807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1079349334] [2022-11-03 04:02:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:29,121 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:29,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:29,122 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:29,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 04:02:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:29,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:02:30,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:30,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1079349334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:30,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:30,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:02:30,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053127869] [2022-11-03 04:02:30,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:30,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:30,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:02:30,060 INFO L87 Difference]: Start difference. First operand 592 states and 830 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:30,301 INFO L93 Difference]: Finished difference Result 1299 states and 1849 transitions. [2022-11-03 04:02:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:30,304 INFO L225 Difference]: With dead ends: 1299 [2022-11-03 04:02:30,304 INFO L226 Difference]: Without dead ends: 1077 [2022-11-03 04:02:30,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:02:30,306 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 849 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:30,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 609 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-11-03 04:02:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 608. [2022-11-03 04:02:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 1.4036243822075782) internal successors, (852), 607 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 852 transitions. [2022-11-03 04:02:30,330 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 852 transitions. Word has length 243 [2022-11-03 04:02:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:30,331 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 852 transitions. [2022-11-03 04:02:30,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 852 transitions. [2022-11-03 04:02:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:30,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:30,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:30,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:30,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:30,740 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1549212027, now seen corresponding path program 1 times [2022-11-03 04:02:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:30,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323292254] [2022-11-03 04:02:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:30,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:30,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:30,743 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:30,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 04:02:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:31,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:31,826 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:31,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323292254] [2022-11-03 04:02:31,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323292254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:31,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989573173] [2022-11-03 04:02:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:31,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:31,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:31,830 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:31,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 04:02:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:02:32,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:32,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989573173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:32,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:32,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:02:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008212006] [2022-11-03 04:02:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:02:32,822 INFO L87 Difference]: Start difference. First operand 608 states and 852 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:33,087 INFO L93 Difference]: Finished difference Result 1315 states and 1877 transitions. [2022-11-03 04:02:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:33,090 INFO L225 Difference]: With dead ends: 1315 [2022-11-03 04:02:33,090 INFO L226 Difference]: Without dead ends: 1109 [2022-11-03 04:02:33,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:02:33,091 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 829 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:33,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 636 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-11-03 04:02:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 640. [2022-11-03 04:02:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.405320813771518) internal successors, (898), 639 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 898 transitions. [2022-11-03 04:02:33,112 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 898 transitions. Word has length 243 [2022-11-03 04:02:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:33,113 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 898 transitions. [2022-11-03 04:02:33,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 898 transitions. [2022-11-03 04:02:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:33,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:33,115 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, 1, 1, 1, 1, 1, 1, 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 04:02:33,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:33,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 04:02:33,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:33,520 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash -581861373, now seen corresponding path program 1 times [2022-11-03 04:02:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:33,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642437118] [2022-11-03 04:02:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:33,524 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:33,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 04:02:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:34,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:34,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:34,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:34,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642437118] [2022-11-03 04:02:34,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642437118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:34,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636603331] [2022-11-03 04:02:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:34,586 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:34,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:34,587 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:34,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 04:02:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:35,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:02:35,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:35,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636603331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:35,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:35,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:02:35,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311279402] [2022-11-03 04:02:35,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:02:35,587 INFO L87 Difference]: Start difference. First operand 640 states and 898 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:35,860 INFO L93 Difference]: Finished difference Result 1347 states and 1925 transitions. [2022-11-03 04:02:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:35,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:35,863 INFO L225 Difference]: With dead ends: 1347 [2022-11-03 04:02:35,863 INFO L226 Difference]: Without dead ends: 1127 [2022-11-03 04:02:35,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:02:35,864 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 815 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:35,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 650 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-03 04:02:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 658. [2022-11-03 04:02:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.4048706240487063) internal successors, (923), 657 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 923 transitions. [2022-11-03 04:02:35,889 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 923 transitions. Word has length 243 [2022-11-03 04:02:35,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:35,890 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 923 transitions. [2022-11-03 04:02:35,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 923 transitions. [2022-11-03 04:02:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:35,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:35,893 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, 1, 1, 1, 1, 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 04:02:35,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:36,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-03 04:02:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:36,315 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1025762047, now seen corresponding path program 1 times [2022-11-03 04:02:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385362453] [2022-11-03 04:02:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:36,319 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:36,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 04:02:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:36,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:37,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:37,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385362453] [2022-11-03 04:02:37,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385362453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982707036] [2022-11-03 04:02:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:37,385 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:37,387 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:37,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 04:02:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:02:38,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:38,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1982707036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:38,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:38,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:02:38,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275593849] [2022-11-03 04:02:38,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:38,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:38,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:02:38,340 INFO L87 Difference]: Start difference. First operand 658 states and 923 transitions. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:38,521 INFO L93 Difference]: Finished difference Result 2368 states and 3402 transitions. [2022-11-03 04:02:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:38,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:38,524 INFO L225 Difference]: With dead ends: 2368 [2022-11-03 04:02:38,524 INFO L226 Difference]: Without dead ends: 1945 [2022-11-03 04:02:38,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:02:38,525 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 902 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:38,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 746 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-11-03 04:02:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 908. [2022-11-03 04:02:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.4211686879823595) internal successors, (1289), 907 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1289 transitions. [2022-11-03 04:02:38,558 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1289 transitions. Word has length 243 [2022-11-03 04:02:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:38,558 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1289 transitions. [2022-11-03 04:02:38,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1289 transitions. [2022-11-03 04:02:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:38,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:38,562 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, 1, 1, 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 04:02:38,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:38,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:38,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:38,976 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash 819605119, now seen corresponding path program 1 times [2022-11-03 04:02:38,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:38,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645393983] [2022-11-03 04:02:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:38,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:38,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:38,979 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:38,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 04:02:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:39,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:40,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645393983] [2022-11-03 04:02:40,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645393983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:40,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508288105] [2022-11-03 04:02:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:40,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:40,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:40,047 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:40,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 04:02:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:40,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:02:40,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:40,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1508288105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:40,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:40,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:02:40,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086330783] [2022-11-03 04:02:40,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:40,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:40,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:02:40,972 INFO L87 Difference]: Start difference. First operand 908 states and 1289 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:41,235 INFO L93 Difference]: Finished difference Result 2011 states and 2903 transitions. [2022-11-03 04:02:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:41,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:41,239 INFO L225 Difference]: With dead ends: 2011 [2022-11-03 04:02:41,239 INFO L226 Difference]: Without dead ends: 1687 [2022-11-03 04:02:41,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:02:41,241 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 797 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:41,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 673 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-11-03 04:02:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 954. [2022-11-03 04:02:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.421825813221406) internal successors, (1355), 953 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1355 transitions. [2022-11-03 04:02:41,272 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1355 transitions. Word has length 243 [2022-11-03 04:02:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:41,273 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 1355 transitions. [2022-11-03 04:02:41,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1355 transitions. [2022-11-03 04:02:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:41,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:41,276 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, 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 04:02:41,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-03 04:02:41,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 04:02:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:41,682 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 396903293, now seen corresponding path program 1 times [2022-11-03 04:02:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254197332] [2022-11-03 04:02:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:41,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:41,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:41,685 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:41,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 04:02:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:42,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:42,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:42,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:42,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:42,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254197332] [2022-11-03 04:02:42,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254197332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:42,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1892004182] [2022-11-03 04:02:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:42,777 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:42,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:42,778 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:42,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 04:02:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:02:43,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:43,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1892004182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:43,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:43,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:02:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725141933] [2022-11-03 04:02:43,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:43,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:43,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:02:43,737 INFO L87 Difference]: Start difference. First operand 954 states and 1355 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:44,010 INFO L93 Difference]: Finished difference Result 2057 states and 2970 transitions. [2022-11-03 04:02:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:44,027 INFO L225 Difference]: With dead ends: 2057 [2022-11-03 04:02:44,027 INFO L226 Difference]: Without dead ends: 1701 [2022-11-03 04:02:44,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:02:44,028 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 786 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:44,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 683 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-11-03 04:02:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 934. [2022-11-03 04:02:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.4212218649517685) internal successors, (1326), 933 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1326 transitions. [2022-11-03 04:02:44,055 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1326 transitions. Word has length 243 [2022-11-03 04:02:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:44,055 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1326 transitions. [2022-11-03 04:02:44,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1326 transitions. [2022-11-03 04:02:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:44,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:44,059 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, 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 04:02:44,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:44,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-03 04:02:44,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:44,482 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1378104069, now seen corresponding path program 1 times [2022-11-03 04:02:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:44,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545875905] [2022-11-03 04:02:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:44,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:44,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:44,486 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:44,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 04:02:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:45,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:45,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:45,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:45,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545875905] [2022-11-03 04:02:45,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545875905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:45,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [475153120] [2022-11-03 04:02:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:45,557 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:45,558 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 04:02:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:46,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:46,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:46,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:47,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [475153120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:47,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971882900] [2022-11-03 04:02:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:47,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:47,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:47,009 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:47,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 04:02:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 85 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:48,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 85 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:48,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971882900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:48,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:02:48,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 24 [2022-11-03 04:02:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134454303] [2022-11-03 04:02:48,664 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:48,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 04:02:48,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 04:02:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:02:48,667 INFO L87 Difference]: Start difference. First operand 934 states and 1326 transitions. Second operand has 24 states, 24 states have (on average 23.416666666666668) internal successors, (562), 24 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:54,428 INFO L93 Difference]: Finished difference Result 22678 states and 33106 transitions. [2022-11-03 04:02:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-03 04:02:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 23.416666666666668) internal successors, (562), 24 states have internal predecessors, (562), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:54,457 INFO L225 Difference]: With dead ends: 22678 [2022-11-03 04:02:54,457 INFO L226 Difference]: Without dead ends: 21945 [2022-11-03 04:02:54,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1430 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7848 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3839, Invalid=18213, Unknown=0, NotChecked=0, Total=22052 [2022-11-03 04:02:54,465 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 20217 mSDsluCounter, 2713 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20217 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:54,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20217 Valid, 2903 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 04:02:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21945 states. [2022-11-03 04:02:54,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21945 to 2771. [2022-11-03 04:02:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 1.4411552346570398) internal successors, (3992), 2770 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 3992 transitions. [2022-11-03 04:02:54,620 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 3992 transitions. Word has length 243 [2022-11-03 04:02:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:54,620 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 3992 transitions. [2022-11-03 04:02:54,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 23.416666666666668) internal successors, (562), 24 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 3992 transitions. [2022-11-03 04:02:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:54,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:54,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:54,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:54,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 04:02:55,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-03 04:02:55,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:55,245 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:55,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1325654661, now seen corresponding path program 1 times [2022-11-03 04:02:55,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:55,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859631952] [2022-11-03 04:02:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:55,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:55,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:55,248 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:55,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 04:02:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:56,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:56,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:56,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859631952] [2022-11-03 04:02:56,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859631952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:56,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1852982687] [2022-11-03 04:02:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:56,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:56,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:56,819 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:56,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 04:02:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:57,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:57,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:57,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1852982687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:57,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:57,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:57,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333900741] [2022-11-03 04:02:57,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:57,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:57,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:57,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:57,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:57,589 INFO L87 Difference]: Start difference. First operand 2771 states and 3992 transitions. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:57,778 INFO L93 Difference]: Finished difference Result 10083 states and 14666 transitions. [2022-11-03 04:02:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:02:57,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:57,793 INFO L225 Difference]: With dead ends: 10083 [2022-11-03 04:02:57,793 INFO L226 Difference]: Without dead ends: 7621 [2022-11-03 04:02:57,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:57,799 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 850 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:57,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 709 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7621 states. [2022-11-03 04:02:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7621 to 2819. [2022-11-03 04:02:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2818 states have (on average 1.4393186657203692) internal successors, (4056), 2818 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4056 transitions. [2022-11-03 04:02:57,936 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4056 transitions. Word has length 243 [2022-11-03 04:02:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:57,937 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 4056 transitions. [2022-11-03 04:02:57,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4056 transitions. [2022-11-03 04:02:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:57,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:57,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:57,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-03 04:02:58,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 04:02:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:58,350 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1930728061, now seen corresponding path program 1 times [2022-11-03 04:02:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:58,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507659335] [2022-11-03 04:02:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:58,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:58,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:58,352 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:58,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 04:02:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:58,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:59,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:59,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:59,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507659335] [2022-11-03 04:02:59,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507659335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:59,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1449794897] [2022-11-03 04:02:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:59,752 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:59,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:59,752 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:59,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 04:03:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:01,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1449794897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944882594] [2022-11-03 04:03:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:01,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:01,523 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:01,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 04:03:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:01,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:02,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:02,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944882594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:02,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:02,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 24 [2022-11-03 04:03:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903553092] [2022-11-03 04:03:02,903 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:02,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 04:03:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 04:03:02,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:03:02,906 INFO L87 Difference]: Start difference. First operand 2819 states and 4056 transitions. Second operand has 24 states, 24 states have (on average 27.541666666666668) internal successors, (661), 24 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:08,438 INFO L93 Difference]: Finished difference Result 54359 states and 78630 transitions. [2022-11-03 04:03:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 04:03:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 27.541666666666668) internal successors, (661), 24 states have internal predecessors, (661), 0 states have call successors, (0), 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 243 [2022-11-03 04:03:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:08,527 INFO L225 Difference]: With dead ends: 54359 [2022-11-03 04:03:08,527 INFO L226 Difference]: Without dead ends: 51849 [2022-11-03 04:03:08,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1438 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4921 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2877, Invalid=12129, Unknown=0, NotChecked=0, Total=15006 [2022-11-03 04:03:08,543 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 11448 mSDsluCounter, 5060 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11448 SdHoareTripleChecker+Valid, 5521 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1423 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:08,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11448 Valid, 5521 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1648 Invalid, 0 Unknown, 1423 Unchecked, 1.7s Time] [2022-11-03 04:03:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51849 states. [2022-11-03 04:03:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51849 to 5927. [2022-11-03 04:03:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5927 states, 5926 states have (on average 1.4309821127235909) internal successors, (8480), 5926 states have internal predecessors, (8480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 8480 transitions. [2022-11-03 04:03:09,069 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 8480 transitions. Word has length 243 [2022-11-03 04:03:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:09,069 INFO L495 AbstractCegarLoop]: Abstraction has 5927 states and 8480 transitions. [2022-11-03 04:03:09,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 27.541666666666668) internal successors, (661), 24 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 8480 transitions. [2022-11-03 04:03:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:09,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:09,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:09,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:09,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:09,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:09,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:09,695 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1314406017, now seen corresponding path program 1 times [2022-11-03 04:03:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:09,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870752635] [2022-11-03 04:03:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:09,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:09,697 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:09,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 04:03:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:10,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:03:10,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:11,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:11,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:11,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870752635] [2022-11-03 04:03:11,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870752635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:11,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1517801664] [2022-11-03 04:03:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:11,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:11,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:11,942 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:11,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 04:03:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:03:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:03:12,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1517801664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:12,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:12,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:03:12,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924111093] [2022-11-03 04:03:12,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:12,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:03:12,758 INFO L87 Difference]: Start difference. First operand 5927 states and 8480 transitions. Second operand has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:13,145 INFO L93 Difference]: Finished difference Result 24637 states and 35427 transitions. [2022-11-03 04:03:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:03:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 0 states have call successors, (0), 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 243 [2022-11-03 04:03:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:13,171 INFO L225 Difference]: With dead ends: 24637 [2022-11-03 04:03:13,171 INFO L226 Difference]: Without dead ends: 19147 [2022-11-03 04:03:13,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 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 04:03:13,179 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 911 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:13,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 817 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:03:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19147 states. [2022-11-03 04:03:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19147 to 8359. [2022-11-03 04:03:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8359 states, 8358 states have (on average 1.4357501794687724) internal successors, (12000), 8358 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8359 states to 8359 states and 12000 transitions. [2022-11-03 04:03:13,619 INFO L78 Accepts]: Start accepts. Automaton has 8359 states and 12000 transitions. Word has length 243 [2022-11-03 04:03:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:13,620 INFO L495 AbstractCegarLoop]: Abstraction has 8359 states and 12000 transitions. [2022-11-03 04:03:13,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8359 states and 12000 transitions. [2022-11-03 04:03:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:13,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:13,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:13,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:13,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:14,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:14,052 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:14,053 INFO L85 PathProgramCache]: Analyzing trace with hash 417012739, now seen corresponding path program 1 times [2022-11-03 04:03:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422098367] [2022-11-03 04:03:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:14,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:14,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:14,056 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:14,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 04:03:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:03:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:15,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:16,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:16,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422098367] [2022-11-03 04:03:16,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422098367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:16,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234974602] [2022-11-03 04:03:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:16,380 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:16,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:16,383 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:16,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 04:03:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:17,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:03:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:28,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234974602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:28,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668706893] [2022-11-03 04:03:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:28,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:28,565 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:28,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 04:03:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:29,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:29,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:29,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:30,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668706893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:30,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:30,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 15, 15, 9, 9] total 49 [2022-11-03 04:03:30,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219104521] [2022-11-03 04:03:30,500 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:30,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 04:03:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 04:03:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2187, Unknown=2, NotChecked=0, Total=2352 [2022-11-03 04:03:30,503 INFO L87 Difference]: Start difference. First operand 8359 states and 12000 transitions. Second operand has 49 states, 49 states have (on average 19.836734693877553) internal successors, (972), 49 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 04:04:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:40,167 INFO L93 Difference]: Finished difference Result 461296 states and 659646 transitions. [2022-11-03 04:04:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 583 states. [2022-11-03 04:04:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 19.836734693877553) internal successors, (972), 49 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-11-03 04:04:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:40,756 INFO L225 Difference]: With dead ends: 461296 [2022-11-03 04:04:40,756 INFO L226 Difference]: Without dead ends: 453374 [2022-11-03 04:04:41,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2045 GetRequests, 1417 SyntacticMatches, 0 SemanticMatches, 628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169842 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=41651, Invalid=354617, Unknown=2, NotChecked=0, Total=396270 [2022-11-03 04:04:41,017 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 30813 mSDsluCounter, 18594 mSDsCounter, 0 mSdLazyCounter, 5467 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30813 SdHoareTripleChecker+Valid, 19242 SdHoareTripleChecker+Invalid, 25954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 5467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19585 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:41,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30813 Valid, 19242 Invalid, 25954 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [902 Valid, 5467 Invalid, 0 Unknown, 19585 Unchecked, 6.0s Time] [2022-11-03 04:04:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453374 states. [2022-11-03 04:04:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453374 to 26207. [2022-11-03 04:04:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26207 states, 26206 states have (on average 1.4306647332671907) internal successors, (37492), 26206 states have internal predecessors, (37492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26207 states to 26207 states and 37492 transitions. [2022-11-03 04:04:43,587 INFO L78 Accepts]: Start accepts. Automaton has 26207 states and 37492 transitions. Word has length 243 [2022-11-03 04:04:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:43,588 INFO L495 AbstractCegarLoop]: Abstraction has 26207 states and 37492 transitions. [2022-11-03 04:04:43,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 19.836734693877553) internal successors, (972), 49 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 04:04:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 26207 states and 37492 transitions. [2022-11-03 04:04:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:43,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:43,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:43,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:43,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:44,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 04:04:44,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:44,227 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash 318223755, now seen corresponding path program 1 times [2022-11-03 04:04:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:44,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362833795] [2022-11-03 04:04:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:44,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:44,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:44,229 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:44,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 04:04:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:44,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 95 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:45,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 95 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:46,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:46,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362833795] [2022-11-03 04:04:46,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362833795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:46,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766492850] [2022-11-03 04:04:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:46,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:46,745 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:46,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 04:04:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:47,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:04:47,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:47,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1766492850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:47,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:47,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 15 [2022-11-03 04:04:47,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867752794] [2022-11-03 04:04:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:47,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:47,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:47,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:04:47,605 INFO L87 Difference]: Start difference. First operand 26207 states and 37492 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:49,882 INFO L93 Difference]: Finished difference Result 81746 states and 116527 transitions. [2022-11-03 04:04:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:49,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:49,915 INFO L225 Difference]: With dead ends: 81746 [2022-11-03 04:04:49,915 INFO L226 Difference]: Without dead ends: 55599 [2022-11-03 04:04:49,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:49,925 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 547 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:49,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1058 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55599 states. [2022-11-03 04:04:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55599 to 26233. [2022-11-03 04:04:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26233 states, 26232 states have (on average 1.4266544678255566) internal successors, (37424), 26232 states have internal predecessors, (37424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26233 states to 26233 states and 37424 transitions. [2022-11-03 04:04:51,089 INFO L78 Accepts]: Start accepts. Automaton has 26233 states and 37424 transitions. Word has length 243 [2022-11-03 04:04:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:51,090 INFO L495 AbstractCegarLoop]: Abstraction has 26233 states and 37424 transitions. [2022-11-03 04:04:51,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26233 states and 37424 transitions. [2022-11-03 04:04:51,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:51,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:51,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:51,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 04:04:51,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-11-03 04:04:51,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:51,517 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1669608973, now seen corresponding path program 1 times [2022-11-03 04:04:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:51,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356537606] [2022-11-03 04:04:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:51,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:51,520 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:51,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 04:04:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:51,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 91 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:53,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 91 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:53,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:53,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356537606] [2022-11-03 04:04:53,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356537606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:53,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043161016] [2022-11-03 04:04:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:53,916 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:53,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:53,918 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:53,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 04:04:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:54,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:04:54,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:54,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2043161016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:54,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:54,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 15 [2022-11-03 04:04:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039264737] [2022-11-03 04:04:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:54,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:04:54,681 INFO L87 Difference]: Start difference. First operand 26233 states and 37424 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:57,152 INFO L93 Difference]: Finished difference Result 82106 states and 116778 transitions. [2022-11-03 04:04:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:57,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:57,183 INFO L225 Difference]: With dead ends: 82106 [2022-11-03 04:04:57,183 INFO L226 Difference]: Without dead ends: 55971 [2022-11-03 04:04:57,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:57,193 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 547 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:57,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1061 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55971 states. [2022-11-03 04:04:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55971 to 26245. [2022-11-03 04:04:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26245 states, 26244 states have (on average 1.4228776101204084) internal successors, (37342), 26244 states have internal predecessors, (37342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26245 states to 26245 states and 37342 transitions. [2022-11-03 04:04:58,106 INFO L78 Accepts]: Start accepts. Automaton has 26245 states and 37342 transitions. Word has length 243 [2022-11-03 04:04:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:58,107 INFO L495 AbstractCegarLoop]: Abstraction has 26245 states and 37342 transitions. [2022-11-03 04:04:58,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 26245 states and 37342 transitions. [2022-11-03 04:04:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:58,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:58,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:58,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:58,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-11-03 04:04:58,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:58,546 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash -270973041, now seen corresponding path program 1 times [2022-11-03 04:04:58,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:58,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464853485] [2022-11-03 04:04:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:58,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:58,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:58,548 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:58,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 04:04:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:00,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:01,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464853485] [2022-11-03 04:05:01,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464853485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2032489448] [2022-11-03 04:05:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:01,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:01,257 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:01,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 04:05:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:01,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:05:02,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:02,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2032489448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:02,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:02,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 15 [2022-11-03 04:05:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179027469] [2022-11-03 04:05:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:02,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:05:02,033 INFO L87 Difference]: Start difference. First operand 26245 states and 37342 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:04,080 INFO L93 Difference]: Finished difference Result 82802 states and 117527 transitions. [2022-11-03 04:05:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:04,109 INFO L225 Difference]: With dead ends: 82802 [2022-11-03 04:05:04,109 INFO L226 Difference]: Without dead ends: 56691 [2022-11-03 04:05:04,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:04,121 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 548 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:04,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1070 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56691 states. [2022-11-03 04:05:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56691 to 26269. [2022-11-03 04:05:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26269 states, 26268 states have (on average 1.420854271356784) internal successors, (37323), 26268 states have internal predecessors, (37323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26269 states to 26269 states and 37323 transitions. [2022-11-03 04:05:05,047 INFO L78 Accepts]: Start accepts. Automaton has 26269 states and 37323 transitions. Word has length 243 [2022-11-03 04:05:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:05,047 INFO L495 AbstractCegarLoop]: Abstraction has 26269 states and 37323 transitions. [2022-11-03 04:05:05,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 26269 states and 37323 transitions. [2022-11-03 04:05:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:05,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:05,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:05,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:05,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 04:05:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:05:05,476 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1053883153, now seen corresponding path program 1 times [2022-11-03 04:05:05,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:05,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29866869] [2022-11-03 04:05:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:05,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:05,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:05,479 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:05,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 04:05:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:06,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:07,983 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:07,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29866869] [2022-11-03 04:05:07,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29866869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:07,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1610322734] [2022-11-03 04:05:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:07,984 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:07,985 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:07,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-03 04:05:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:08,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:08,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:05:08,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:08,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1610322734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:08,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:08,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192691893] [2022-11-03 04:05:08,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:08,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:08,811 INFO L87 Difference]: Start difference. First operand 26269 states and 37323 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:10,823 INFO L93 Difference]: Finished difference Result 83810 states and 118792 transitions. [2022-11-03 04:05:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:10,856 INFO L225 Difference]: With dead ends: 83810 [2022-11-03 04:05:10,856 INFO L226 Difference]: Without dead ends: 57807 [2022-11-03 04:05:10,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:10,867 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 552 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:10,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1092 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57807 states. [2022-11-03 04:05:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57807 to 26377. [2022-11-03 04:05:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26377 states, 26376 states have (on average 1.416439187139824) internal successors, (37360), 26376 states have internal predecessors, (37360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26377 states to 26377 states and 37360 transitions. [2022-11-03 04:05:12,025 INFO L78 Accepts]: Start accepts. Automaton has 26377 states and 37360 transitions. Word has length 243 [2022-11-03 04:05:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:12,025 INFO L495 AbstractCegarLoop]: Abstraction has 26377 states and 37360 transitions. [2022-11-03 04:05:12,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26377 states and 37360 transitions. [2022-11-03 04:05:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:12,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:12,042 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, 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 04:05:12,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:12,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 04:05:12,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:05:12,443 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash -162270573, now seen corresponding path program 1 times [2022-11-03 04:05:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:12,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503506428] [2022-11-03 04:05:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:12,446 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:12,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 04:05:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:14,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:14,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503506428] [2022-11-03 04:05:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503506428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2040070932] [2022-11-03 04:05:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:14,906 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:14,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 04:05:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:05:15,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:15,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2040070932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:15,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:15,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:15,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505193665] [2022-11-03 04:05:15,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:15,717 INFO L87 Difference]: Start difference. First operand 26377 states and 37360 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:17,782 INFO L93 Difference]: Finished difference Result 84090 states and 118821 transitions. [2022-11-03 04:05:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:17,825 INFO L225 Difference]: With dead ends: 84090 [2022-11-03 04:05:17,825 INFO L226 Difference]: Without dead ends: 58139 [2022-11-03 04:05:17,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:17,835 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 552 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:17,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1095 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58139 states. [2022-11-03 04:05:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58139 to 26429. [2022-11-03 04:05:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26429 states, 26428 states have (on average 1.408657484486151) internal successors, (37228), 26428 states have internal predecessors, (37228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26429 states to 26429 states and 37228 transitions. [2022-11-03 04:05:18,651 INFO L78 Accepts]: Start accepts. Automaton has 26429 states and 37228 transitions. Word has length 243 [2022-11-03 04:05:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:18,651 INFO L495 AbstractCegarLoop]: Abstraction has 26429 states and 37228 transitions. [2022-11-03 04:05:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 26429 states and 37228 transitions. [2022-11-03 04:05:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:18,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:18,667 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, 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 04:05:18,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:18,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2022-11-03 04:05:19,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:19,080 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -579667179, now seen corresponding path program 1 times [2022-11-03 04:05:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:19,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239552998] [2022-11-03 04:05:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:19,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:19,082 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:19,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 04:05:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:19,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:20,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:21,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239552998] [2022-11-03 04:05:21,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239552998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [642558623] [2022-11-03 04:05:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:21,466 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:21,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 04:05:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:05:22,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:22,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [642558623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:22,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:22,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281813236] [2022-11-03 04:05:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:22,301 INFO L87 Difference]: Start difference. First operand 26429 states and 37228 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:24,300 INFO L93 Difference]: Finished difference Result 85354 states and 120130 transitions. [2022-11-03 04:05:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:24,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:24,333 INFO L225 Difference]: With dead ends: 85354 [2022-11-03 04:05:24,333 INFO L226 Difference]: Without dead ends: 59539 [2022-11-03 04:05:24,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:24,341 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 554 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:24,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1104 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59539 states. [2022-11-03 04:05:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59539 to 26565. [2022-11-03 04:05:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26565 states, 26564 states have (on average 1.4011444059629574) internal successors, (37220), 26564 states have internal predecessors, (37220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26565 states to 26565 states and 37220 transitions. [2022-11-03 04:05:25,293 INFO L78 Accepts]: Start accepts. Automaton has 26565 states and 37220 transitions. Word has length 243 [2022-11-03 04:05:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:25,293 INFO L495 AbstractCegarLoop]: Abstraction has 26565 states and 37220 transitions. [2022-11-03 04:05:25,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 26565 states and 37220 transitions. [2022-11-03 04:05:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:25,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:25,312 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, 1, 1, 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 04:05:25,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:25,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2022-11-03 04:05:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:25,712 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash 807118231, now seen corresponding path program 1 times [2022-11-03 04:05:25,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:25,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558487865] [2022-11-03 04:05:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:25,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:25,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:25,715 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:25,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 04:05:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:26,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:26,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:27,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:28,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:28,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558487865] [2022-11-03 04:05:28,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558487865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:28,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1174480321] [2022-11-03 04:05:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:28,164 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:28,165 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:28,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 04:05:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:28,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:05:28,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:28,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1174480321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:28,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:28,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:28,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13000535] [2022-11-03 04:05:29,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:29,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:29,001 INFO L87 Difference]: Start difference. First operand 26565 states and 37220 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:31,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:31,459 INFO L93 Difference]: Finished difference Result 86302 states and 120929 transitions. [2022-11-03 04:05:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:31,513 INFO L225 Difference]: With dead ends: 86302 [2022-11-03 04:05:31,513 INFO L226 Difference]: Without dead ends: 60589 [2022-11-03 04:05:31,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:31,533 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 555 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:31,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1110 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60589 states. [2022-11-03 04:05:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60589 to 26667. [2022-11-03 04:05:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26667 states, 26666 states have (on average 1.3930473261831546) internal successors, (37147), 26666 states have internal predecessors, (37147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26667 states to 26667 states and 37147 transitions. [2022-11-03 04:05:32,848 INFO L78 Accepts]: Start accepts. Automaton has 26667 states and 37147 transitions. Word has length 243 [2022-11-03 04:05:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:32,849 INFO L495 AbstractCegarLoop]: Abstraction has 26667 states and 37147 transitions. [2022-11-03 04:05:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 26667 states and 37147 transitions. [2022-11-03 04:05:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:32,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:32,866 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, 1, 1, 1, 1, 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 04:05:32,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-03 04:05:33,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-03 04:05:33,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:05:33,267 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash 791599513, now seen corresponding path program 1 times [2022-11-03 04:05:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:33,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412390450] [2022-11-03 04:05:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:33,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:33,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:33,269 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:33,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 04:05:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:34,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:35,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412390450] [2022-11-03 04:05:35,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412390450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [843058595] [2022-11-03 04:05:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:35,866 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:35,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:35,868 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:35,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a922d5-3dd0-4d40-b027-f9af01794a70/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 04:05:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:36,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 04:05:36,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:36,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [843058595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:36,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:36,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154456599] [2022-11-03 04:05:36,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:36,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:36,742 INFO L87 Difference]: Start difference. First operand 26667 states and 37147 transitions. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)