./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/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_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/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_ab545cee-78e0-47d3-86f4-6da96e7bc393/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 fc22d6d4209dd91d6792979ea560d5b9cdade906028821eba254f4102038ea1f --- 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 01:49:07,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:49:07,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:49:07,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:49:07,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:49:07,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:49:07,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:49:07,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:49:07,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:49:07,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:49:07,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:49:07,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:49:07,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:49:07,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:49:07,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:49:07,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:49:07,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:49:07,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:49:07,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:49:07,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:49:07,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:49:07,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:49:07,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:49:07,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:49:07,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:49:07,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:49:07,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:49:07,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:49:07,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:49:07,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:49:07,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:49:07,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:49:07,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:49:07,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:49:07,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:49:07,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:49:07,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:49:07,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:49:07,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:49:07,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:49:07,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:49:07,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:49:07,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:49:07,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:49:07,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:49:07,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:49:07,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:49:07,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:49:07,408 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:49:07,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:49:07,408 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:49:07,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:49:07,409 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:49:07,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:49:07,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:49:07,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:49:07,410 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:49:07,411 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:49:07,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:49:07,411 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:49:07,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:49:07,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:49:07,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:49:07,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:49:07,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:49:07,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:49:07,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:49:07,413 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:49:07,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:49:07,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:49:07,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:49:07,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:07,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:49:07,429 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:49:07,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:49:07,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:49:07,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:49:07,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:49:07,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:49:07,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:49:07,430 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_ab545cee-78e0-47d3-86f4-6da96e7bc393/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc22d6d4209dd91d6792979ea560d5b9cdade906028821eba254f4102038ea1f [2022-11-03 01:49:07,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:49:07,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:49:07,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:49:07,710 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:49:07,711 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:49:07,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c [2022-11-03 01:49:07,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/6580e7f30/c9d176e81d1e4947b7c0614c4938691a/FLAGa21e1457c [2022-11-03 01:49:08,542 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:49:08,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c [2022-11-03 01:49:08,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/6580e7f30/c9d176e81d1e4947b7c0614c4938691a/FLAGa21e1457c [2022-11-03 01:49:08,692 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/6580e7f30/c9d176e81d1e4947b7c0614c4938691a [2022-11-03 01:49:08,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:49:08,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:49:08,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:08,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:49:08,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:49:08,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:08" (1/1) ... [2022-11-03 01:49:08,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196490b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:08, skipping insertion in model container [2022-11-03 01:49:08,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:08" (1/1) ... [2022-11-03 01:49:08,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:49:08,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:49:09,073 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_ab545cee-78e0-47d3-86f4-6da96e7bc393/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c[1107,1120] [2022-11-03 01:49:09,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:09,604 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:49:09,618 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_ab545cee-78e0-47d3-86f4-6da96e7bc393/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c[1107,1120] [2022-11-03 01:49:09,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:09,895 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:49:09,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09 WrapperNode [2022-11-03 01:49:09,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:09,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:09,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:49:09,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:49:09,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,164 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2307 [2022-11-03 01:49:10,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:10,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:49:10,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:49:10,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:49:10,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:49:10,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:49:10,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:49:10,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:49:10,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:10,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:10,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:10,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:49:10,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:49:10,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:49:10,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:49:11,186 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:49:11,188 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:49:15,230 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:49:26,788 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:49:26,788 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:49:26,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:26 BoogieIcfgContainer [2022-11-03 01:49:26,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:49:26,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:49:26,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:49:26,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:49:26,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:49:08" (1/3) ... [2022-11-03 01:49:26,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e541fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:26, skipping insertion in model container [2022-11-03 01:49:26,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (2/3) ... [2022-11-03 01:49:26,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e541fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:26, skipping insertion in model container [2022-11-03 01:49:26,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:26" (3/3) ... [2022-11-03 01:49:26,803 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p2.c [2022-11-03 01:49:26,828 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:49:26,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:49:26,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:49:26,899 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;@3b85777, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:49:26,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:49:26,905 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 01:49:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:49:26,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:26,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:49:26,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash 30610862, now seen corresponding path program 1 times [2022-11-03 01:49:26,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:26,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909492947] [2022-11-03 01:49:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:26,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:49:27,452 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:49:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:49:27,786 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:49:27,788 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:49:27,790 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:49:27,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:49:27,798 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:49:27,803 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:49:27,831 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:49:27,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:49:27 BoogieIcfgContainer [2022-11-03 01:49:27,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:49:27,844 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:49:27,844 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:49:27,844 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:49:27,845 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:26" (3/4) ... [2022-11-03 01:49:27,849 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:49:27,849 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:49:27,851 INFO L158 Benchmark]: Toolchain (without parser) took 19153.33ms. Allocated memory was 100.7MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 56.5MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 464.4MB. Max. memory is 16.1GB. [2022-11-03 01:49:27,852 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 100.7MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:49:27,853 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1195.19ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 56.3MB in the beginning and 85.3MB in the end (delta: -28.9MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2022-11-03 01:49:27,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 267.16ms. Allocated memory is still 136.3MB. Free memory was 85.3MB in the beginning and 82.2MB in the end (delta: 3.1MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2022-11-03 01:49:27,854 INFO L158 Benchmark]: Boogie Preprocessor took 375.03ms. Allocated memory is still 136.3MB. Free memory was 82.2MB in the beginning and 70.5MB in the end (delta: 11.7MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2022-11-03 01:49:27,855 INFO L158 Benchmark]: RCFGBuilder took 16250.66ms. Allocated memory was 136.3MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 70.5MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 698.8MB. Max. memory is 16.1GB. [2022-11-03 01:49:27,856 INFO L158 Benchmark]: TraceAbstraction took 1048.97ms. Allocated memory is still 1.8GB. Free memory was 1.4GB in the beginning and 1.3GB in the end (delta: 64.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2022-11-03 01:49:27,857 INFO L158 Benchmark]: Witness Printer took 5.83ms. Allocated memory is still 1.8GB. Free memory was 1.3GB in the beginning and 1.3GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:49:27,861 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 100.7MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1195.19ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 56.3MB in the beginning and 85.3MB in the end (delta: -28.9MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 267.16ms. Allocated memory is still 136.3MB. Free memory was 85.3MB in the beginning and 82.2MB in the end (delta: 3.1MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 375.03ms. Allocated memory is still 136.3MB. Free memory was 82.2MB in the beginning and 70.5MB in the end (delta: 11.7MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. * RCFGBuilder took 16250.66ms. Allocated memory was 136.3MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 70.5MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 698.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1048.97ms. Allocated memory is still 1.8GB. Free memory was 1.4GB in the beginning and 1.3GB in the end (delta: 64.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 5.83ms. Allocated memory is still 1.8GB. Free memory was 1.3GB in the beginning and 1.3GB in the end (delta: 1.0MB). 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 197, overapproximation of bitwiseAnd at line 192. 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_38 mask_SORT_38 = (SORT_38)-1 >> (sizeof(SORT_38) * 8 - 12); [L32] const SORT_38 msb_SORT_38 = (SORT_38)1 << (12 - 1); [L34] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 3); [L35] const SORT_44 msb_SORT_44 = (SORT_44)1 << (3 - 1); [L37] const SORT_71 mask_SORT_71 = (SORT_71)-1 >> (sizeof(SORT_71) * 8 - 2); [L38] const SORT_71 msb_SORT_71 = (SORT_71)1 << (2 - 1); [L40] const SORT_230 mask_SORT_230 = (SORT_230)-1 >> (sizeof(SORT_230) * 8 - 4); [L41] const SORT_230 msb_SORT_230 = (SORT_230)1 << (4 - 1); [L43] const SORT_232 mask_SORT_232 = (SORT_232)-1 >> (sizeof(SORT_232) * 8 - 5); [L44] const SORT_232 msb_SORT_232 = (SORT_232)1 << (5 - 1); [L46] const SORT_234 mask_SORT_234 = (SORT_234)-1 >> (sizeof(SORT_234) * 8 - 6); [L47] const SORT_234 msb_SORT_234 = (SORT_234)1 << (6 - 1); [L49] const SORT_236 mask_SORT_236 = (SORT_236)-1 >> (sizeof(SORT_236) * 8 - 7); [L50] const SORT_236 msb_SORT_236 = (SORT_236)1 << (7 - 1); [L52] const SORT_238 mask_SORT_238 = (SORT_238)-1 >> (sizeof(SORT_238) * 8 - 8); [L53] const SORT_238 msb_SORT_238 = (SORT_238)1 << (8 - 1); [L55] const SORT_240 mask_SORT_240 = (SORT_240)-1 >> (sizeof(SORT_240) * 8 - 9); [L56] const SORT_240 msb_SORT_240 = (SORT_240)1 << (9 - 1); [L58] const SORT_242 mask_SORT_242 = (SORT_242)-1 >> (sizeof(SORT_242) * 8 - 10); [L59] const SORT_242 msb_SORT_242 = (SORT_242)1 << (10 - 1); [L61] const SORT_244 mask_SORT_244 = (SORT_244)-1 >> (sizeof(SORT_244) * 8 - 11); [L62] const SORT_244 msb_SORT_244 = (SORT_244)1 << (11 - 1); [L64] const SORT_247 mask_SORT_247 = (SORT_247)-1 >> (sizeof(SORT_247) * 8 - 13); [L65] const SORT_247 msb_SORT_247 = (SORT_247)1 << (13 - 1); [L67] const SORT_249 mask_SORT_249 = (SORT_249)-1 >> (sizeof(SORT_249) * 8 - 14); [L68] const SORT_249 msb_SORT_249 = (SORT_249)1 << (14 - 1); [L70] const SORT_251 mask_SORT_251 = (SORT_251)-1 >> (sizeof(SORT_251) * 8 - 15); [L71] const SORT_251 msb_SORT_251 = (SORT_251)1 << (15 - 1); [L73] const SORT_460 mask_SORT_460 = (SORT_460)-1 >> (sizeof(SORT_460) * 8 - 17); [L74] const SORT_460 msb_SORT_460 = (SORT_460)1 << (17 - 1); [L76] const SORT_3 var_6 = 0; [L77] const SORT_1 var_11 = 0; [L78] const SORT_1 var_22 = 1; [L79] const SORT_38 var_39 = 0; [L80] const SORT_44 var_45 = 0; [L81] const SORT_44 var_49 = 2; [L82] const SORT_44 var_53 = 1; [L83] const SORT_44 var_58 = 4; [L84] const SORT_44 var_60 = 5; [L85] const SORT_44 var_64 = 3; [L86] const SORT_71 var_73 = 0; [L87] const SORT_3 var_80 = 65535; [L88] const SORT_232 var_461 = 0; [L89] const SORT_236 var_507 = 5; [L90] const SORT_236 var_511 = 4; [L91] const SORT_236 var_515 = 3; [L92] const SORT_236 var_519 = 2; [L93] const SORT_236 var_523 = 1; [L94] const SORT_236 var_527 = 0; [L95] const SORT_38 var_561 = 2; [L97] SORT_1 input_2; [L98] SORT_3 input_4; [L99] SORT_3 input_5; [L100] SORT_3 input_68; [L101] SORT_3 input_69; [L102] SORT_3 input_70; [L103] SORT_3 input_79; [L104] SORT_3 input_88; [L105] SORT_3 input_89; [L106] SORT_3 input_90; [L107] SORT_3 input_93; [L108] SORT_3 input_111; [L109] SORT_3 input_112; [L110] SORT_3 input_113; [L111] SORT_3 input_116; [L112] SORT_3 input_118; [L113] SORT_71 input_132; [L114] SORT_71 input_133; [L115] SORT_71 input_134; [L117] SORT_3 state_7 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L118] SORT_3 state_9 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L119] SORT_3 state_13 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L120] SORT_3 state_15 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L121] SORT_3 state_26 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L122] SORT_3 state_28 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L123] SORT_3 state_30 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L124] SORT_1 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_3 state_34 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L126] SORT_3 state_36 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L127] SORT_38 state_40 = __VERIFIER_nondet_ushort() & mask_SORT_38; [L128] SORT_38 state_42 = __VERIFIER_nondet_ushort() & mask_SORT_38; [L129] SORT_44 state_46 = __VERIFIER_nondet_uchar() & mask_SORT_44; [L131] SORT_3 init_8_arg_1 = var_6; [L132] state_7 = init_8_arg_1 [L133] SORT_3 init_10_arg_1 = var_6; [L134] state_9 = init_10_arg_1 [L135] SORT_3 init_14_arg_1 = var_6; [L136] state_13 = init_14_arg_1 [L137] SORT_3 init_16_arg_1 = var_6; [L138] state_15 = init_16_arg_1 [L139] SORT_3 init_27_arg_1 = var_6; [L140] state_26 = init_27_arg_1 [L141] SORT_3 init_29_arg_1 = var_6; [L142] state_28 = init_29_arg_1 [L143] SORT_3 init_31_arg_1 = var_6; [L144] state_30 = init_31_arg_1 [L145] SORT_1 init_33_arg_1 = var_11; [L146] state_32 = init_33_arg_1 [L147] SORT_3 init_35_arg_1 = var_6; [L148] state_34 = init_35_arg_1 [L149] SORT_3 init_37_arg_1 = var_6; [L150] state_36 = init_37_arg_1 [L151] SORT_38 init_41_arg_1 = var_39; [L152] state_40 = init_41_arg_1 [L153] SORT_38 init_43_arg_1 = var_39; [L154] state_42 = init_43_arg_1 [L155] SORT_44 init_47_arg_1 = var_45; [L156] state_46 = init_47_arg_1 VAL [init_10_arg_1=0, init_14_arg_1=0, init_16_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_47_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_230=15, mask_SORT_232=31, mask_SORT_234=63, mask_SORT_236=127, mask_SORT_238=255, mask_SORT_240=511, mask_SORT_242=1023, mask_SORT_244=2047, mask_SORT_247=8191, mask_SORT_249=16383, mask_SORT_251=32767, mask_SORT_3=65535, mask_SORT_38=4095, mask_SORT_44=7, mask_SORT_460=4294967295, mask_SORT_71=3, msb_SORT_1=1, msb_SORT_230=8, msb_SORT_232=16, msb_SORT_234=32, msb_SORT_236=64, msb_SORT_238=128, msb_SORT_240=256, msb_SORT_242=512, msb_SORT_244=1024, msb_SORT_247=4096, msb_SORT_249=8192, msb_SORT_251=16384, msb_SORT_3=32768, msb_SORT_38=2048, msb_SORT_44=4, msb_SORT_460=65536, msb_SORT_71=2, state_13=0, state_15=0, state_26=0, state_28=0, state_30=0, state_32=0, state_34=0, state_36=0, state_40=0, state_42=0, state_46=0, state_7=0, state_9=0, var_11=0, var_22=1, var_39=0, var_45=0, var_461=0, var_49=2, var_507=5, var_511=4, var_515=3, var_519=2, var_523=1, var_527=0, var_53=1, var_561=2, var_58=4, var_6=0, var_60=5, var_64=3, var_73=0, var_80=65535] [L159] input_2 = __VERIFIER_nondet_uchar() [L160] input_4 = __VERIFIER_nondet_ushort() [L161] input_5 = __VERIFIER_nondet_ushort() [L162] input_68 = __VERIFIER_nondet_ushort() [L163] input_69 = __VERIFIER_nondet_ushort() [L164] input_70 = __VERIFIER_nondet_ushort() [L165] input_79 = __VERIFIER_nondet_ushort() [L166] input_88 = __VERIFIER_nondet_ushort() [L167] input_89 = __VERIFIER_nondet_ushort() [L168] input_90 = __VERIFIER_nondet_ushort() [L169] input_93 = __VERIFIER_nondet_ushort() [L170] input_111 = __VERIFIER_nondet_ushort() [L171] input_112 = __VERIFIER_nondet_ushort() [L172] input_113 = __VERIFIER_nondet_ushort() [L173] input_116 = __VERIFIER_nondet_ushort() [L174] input_118 = __VERIFIER_nondet_ushort() [L175] input_132 = __VERIFIER_nondet_uchar() [L176] input_133 = __VERIFIER_nondet_uchar() [L177] input_134 = __VERIFIER_nondet_uchar() [L180] SORT_1 var_17_arg_0 = var_11; [L181] SORT_3 var_17_arg_1 = state_15; [L182] SORT_3 var_17_arg_2 = state_13; [L183] EXPR var_17_arg_0 ? var_17_arg_1 : var_17_arg_2 [L183] SORT_3 var_17 = var_17_arg_0 ? var_17_arg_1 : var_17_arg_2; [L184] SORT_1 var_12_arg_0 = var_11; [L185] SORT_3 var_12_arg_1 = state_9; [L186] SORT_3 var_12_arg_2 = state_7; [L187] EXPR var_12_arg_0 ? var_12_arg_1 : var_12_arg_2 [L187] SORT_3 var_12 = var_12_arg_0 ? var_12_arg_1 : var_12_arg_2; [L188] SORT_1 var_18_arg_0 = var_11; [L189] SORT_3 var_18_arg_1 = var_17; [L190] SORT_3 var_18_arg_2 = var_12; [L191] EXPR var_18_arg_0 ? var_18_arg_1 : var_18_arg_2 [L191] SORT_3 var_18 = var_18_arg_0 ? var_18_arg_1 : var_18_arg_2; [L192] var_18 = var_18 & mask_SORT_3 [L193] SORT_3 var_19_arg_0 = var_18; [L194] SORT_3 var_19_arg_1 = var_6; [L195] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L196] SORT_1 var_23_arg_0 = var_19; [L197] SORT_1 var_23 = ~var_23_arg_0; [L198] SORT_1 var_24_arg_0 = var_22; [L199] SORT_1 var_24_arg_1 = var_23; [L200] SORT_1 var_24 = var_24_arg_0 & var_24_arg_1; [L201] var_24 = var_24 & mask_SORT_1 [L202] SORT_1 bad_25_arg_0 = var_24; [L203] CALL __VERIFIER_assert(!(bad_25_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: 0.9s, 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, 0.4s 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 01:49:27,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/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_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/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_ab545cee-78e0-47d3-86f4-6da96e7bc393/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 fc22d6d4209dd91d6792979ea560d5b9cdade906028821eba254f4102038ea1f --- 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 01:49:30,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:49:30,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:49:30,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:49:30,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:49:30,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:49:30,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:49:30,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:49:30,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:49:30,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:49:30,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:49:30,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:49:30,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:49:30,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:49:30,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:49:30,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:49:30,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:49:30,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:49:30,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:49:31,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:49:31,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:49:31,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:49:31,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:49:31,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:49:31,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:49:31,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:49:31,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:49:31,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:49:31,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:49:31,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:49:31,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:49:31,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:49:31,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:49:31,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:49:31,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:49:31,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:49:31,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:49:31,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:49:31,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:49:31,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:49:31,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:49:31,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:49:31,096 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:49:31,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:49:31,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:49:31,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:49:31,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:49:31,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:49:31,100 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:49:31,100 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:49:31,100 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:49:31,101 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:49:31,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:49:31,102 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:49:31,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:49:31,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:49:31,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:49:31,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:49:31,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:49:31,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:49:31,106 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:49:31,106 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:49:31,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:49:31,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:49:31,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:49:31,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:49:31,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:49:31,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:49:31,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:31,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:49:31,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:49:31,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:49:31,108 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:49:31,109 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:31,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:49:31,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:49:31,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:49:31,110 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_ab545cee-78e0-47d3-86f4-6da96e7bc393/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc22d6d4209dd91d6792979ea560d5b9cdade906028821eba254f4102038ea1f [2022-11-03 01:49:31,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:49:31,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:49:31,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:49:31,597 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:49:31,598 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:49:31,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c [2022-11-03 01:49:31,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/899f334b3/4592f2a27b7c46b1b0aeb744f8f43067/FLAGa3b35be98 [2022-11-03 01:49:32,545 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:49:32,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c [2022-11-03 01:49:32,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/899f334b3/4592f2a27b7c46b1b0aeb744f8f43067/FLAGa3b35be98 [2022-11-03 01:49:32,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/data/899f334b3/4592f2a27b7c46b1b0aeb744f8f43067 [2022-11-03 01:49:32,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:49:32,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:49:32,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:32,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:49:32,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:49:32,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:32" (1/1) ... [2022-11-03 01:49:32,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348f8750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:32, skipping insertion in model container [2022-11-03 01:49:32,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:32" (1/1) ... [2022-11-03 01:49:32,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:49:32,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:49:33,020 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_ab545cee-78e0-47d3-86f4-6da96e7bc393/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c[1107,1120] [2022-11-03 01:49:33,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:33,605 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:49:33,619 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_ab545cee-78e0-47d3-86f4-6da96e7bc393/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p2.c[1107,1120] [2022-11-03 01:49:33,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:33,808 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:49:33,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33 WrapperNode [2022-11-03 01:49:33,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:33,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:33,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:49:33,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:49:33,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:33,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,057 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2307 [2022-11-03 01:49:34,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:34,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:49:34,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:49:34,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:49:34,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:49:34,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:49:34,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:49:34,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:49:34,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (1/1) ... [2022-11-03 01:49:34,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:34,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:49:34,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:49:34,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:49:34,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:49:35,004 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:49:35,007 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:49:37,034 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:49:37,059 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:49:37,060 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:49:37,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:37 BoogieIcfgContainer [2022-11-03 01:49:37,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:49:37,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:49:37,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:49:37,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:49:37,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:49:32" (1/3) ... [2022-11-03 01:49:37,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f3c4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:37, skipping insertion in model container [2022-11-03 01:49:37,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:33" (2/3) ... [2022-11-03 01:49:37,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f3c4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:37, skipping insertion in model container [2022-11-03 01:49:37,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:37" (3/3) ... [2022-11-03 01:49:37,076 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p2.c [2022-11-03 01:49:37,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:49:37,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:49:37,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:49:37,186 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;@47739683, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:49:37,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:49:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 275 states, 273 states have (on average 1.4981684981684982) internal successors, (409), 274 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:49:37,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:37,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:37,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 01:49:37,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:37,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598158551] [2022-11-03 01:49:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:37,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:37,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:37,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:37,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:49:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:37,943 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 01:49:37,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:37,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:37,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598158551] [2022-11-03 01:49:37,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598158551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:37,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:37,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740312548] [2022-11-03 01:49:37,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:37,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:38,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:38,008 INFO L87 Difference]: Start difference. First operand has 275 states, 273 states have (on average 1.4981684981684982) internal successors, (409), 274 states have internal predecessors, (409), 0 states have call successors, (0), 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 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:38,185 INFO L93 Difference]: Finished difference Result 545 states and 816 transitions. [2022-11-03 01:49:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 01:49:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:38,205 INFO L225 Difference]: With dead ends: 545 [2022-11-03 01:49:38,207 INFO L226 Difference]: Without dead ends: 272 [2022-11-03 01:49:38,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 01:49:38,225 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 799 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:38,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 397 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-03 01:49:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-11-03 01:49:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.488888888888889) internal successors, (402), 270 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 402 transitions. [2022-11-03 01:49:38,315 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 402 transitions. Word has length 11 [2022-11-03 01:49:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:38,316 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 402 transitions. [2022-11-03 01:49:38,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 402 transitions. [2022-11-03 01:49:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:49:38,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:38,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:38,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:38,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:38,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 01:49:38,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:38,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723216982] [2022-11-03 01:49:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:38,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:38,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:49:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:38,968 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 01:49:38,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:38,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:38,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723216982] [2022-11-03 01:49:38,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723216982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:38,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:38,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220045880] [2022-11-03 01:49:38,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:38,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:38,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:38,973 INFO L87 Difference]: Start difference. First operand 271 states and 402 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:39,083 INFO L93 Difference]: Finished difference Result 543 states and 805 transitions. [2022-11-03 01:49:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 01:49:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:39,090 INFO L225 Difference]: With dead ends: 543 [2022-11-03 01:49:39,090 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 01:49:39,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 01:49:39,095 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 795 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:39,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 398 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 01:49:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2022-11-03 01:49:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.4851851851851852) internal successors, (401), 270 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 401 transitions. [2022-11-03 01:49:39,127 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 401 transitions. Word has length 11 [2022-11-03 01:49:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:39,127 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 401 transitions. [2022-11-03 01:49:39,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 401 transitions. [2022-11-03 01:49:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:49:39,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:39,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:39,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:39,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:39,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 01:49:39,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:39,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775548437] [2022-11-03 01:49:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:39,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:39,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:39,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:39,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:49:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:39,786 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 01:49:39,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:39,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:39,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775548437] [2022-11-03 01:49:39,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775548437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:39,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:39,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840098191] [2022-11-03 01:49:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:39,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:39,790 INFO L87 Difference]: Start difference. First operand 271 states and 401 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:39,865 INFO L93 Difference]: Finished difference Result 545 states and 805 transitions. [2022-11-03 01:49:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 01:49:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:39,868 INFO L225 Difference]: With dead ends: 545 [2022-11-03 01:49:39,868 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 01:49:39,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 01:49:39,874 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 791 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:39,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 399 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 01:49:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 271. [2022-11-03 01:49:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.4814814814814814) internal successors, (400), 270 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 400 transitions. [2022-11-03 01:49:39,899 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 400 transitions. Word has length 11 [2022-11-03 01:49:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:39,900 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 400 transitions. [2022-11-03 01:49:39,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 400 transitions. [2022-11-03 01:49:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:49:39,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:39,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:39,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:40,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:40,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 01:49:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:40,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519903420] [2022-11-03 01:49:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:40,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:40,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:40,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:40,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:49:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:49:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:40,910 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 01:49:40,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:40,911 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:40,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519903420] [2022-11-03 01:49:40,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519903420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:40,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:40,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:49:40,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346936124] [2022-11-03 01:49:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:49:40,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:49:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:40,929 INFO L87 Difference]: Start difference. First operand 271 states and 400 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:42,463 INFO L93 Difference]: Finished difference Result 547 states and 805 transitions. [2022-11-03 01:49:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:49:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 01:49:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:42,467 INFO L225 Difference]: With dead ends: 547 [2022-11-03 01:49:42,467 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 01:49:42,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:49:42,469 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1573 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:42,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 2277 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 01:49:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 01:49:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 279. [2022-11-03 01:49:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.4676258992805755) internal successors, (408), 278 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 408 transitions. [2022-11-03 01:49:42,482 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 408 transitions. Word has length 11 [2022-11-03 01:49:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:42,482 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 408 transitions. [2022-11-03 01:49:42,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 408 transitions. [2022-11-03 01:49:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:42,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:42,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:42,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:42,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:42,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1686817151, now seen corresponding path program 1 times [2022-11-03 01:49:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:42,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828244700] [2022-11-03 01:49:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:42,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:42,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:42,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:49:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:43,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:44,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:44,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:44,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828244700] [2022-11-03 01:49:44,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828244700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:44,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:44,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:44,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785801019] [2022-11-03 01:49:44,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:44,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:44,104 INFO L87 Difference]: Start difference. First operand 279 states and 408 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:44,395 INFO L93 Difference]: Finished difference Result 1075 states and 1590 transitions. [2022-11-03 01:49:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:49:44,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:44,399 INFO L225 Difference]: With dead ends: 1075 [2022-11-03 01:49:44,399 INFO L226 Difference]: Without dead ends: 806 [2022-11-03 01:49:44,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 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 01:49:44,401 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1167 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:44,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 1554 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-03 01:49:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 281. [2022-11-03 01:49:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.4642857142857142) internal successors, (410), 280 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 410 transitions. [2022-11-03 01:49:44,416 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 410 transitions. Word has length 278 [2022-11-03 01:49:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:44,416 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 410 transitions. [2022-11-03 01:49:44,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 410 transitions. [2022-11-03 01:49:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:44,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:44,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:44,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:44,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:44,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash 664792833, now seen corresponding path program 1 times [2022-11-03 01:49:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:44,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775593401] [2022-11-03 01:49:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:44,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:44,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:44,654 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:44,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:49:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:49:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:46,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:46,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:46,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775593401] [2022-11-03 01:49:46,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775593401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:46,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:46,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:46,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215158795] [2022-11-03 01:49:46,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:46,025 INFO L87 Difference]: Start difference. First operand 281 states and 410 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:47,033 INFO L93 Difference]: Finished difference Result 1086 states and 1600 transitions. [2022-11-03 01:49:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:47,038 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:49:47,039 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:49:47,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:49:47,041 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1568 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:47,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1568 Valid, 2123 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:49:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:49:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 283. [2022-11-03 01:49:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.4609929078014185) internal successors, (412), 282 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 412 transitions. [2022-11-03 01:49:47,060 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 412 transitions. Word has length 278 [2022-11-03 01:49:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:47,061 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 412 transitions. [2022-11-03 01:49:47,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 412 transitions. [2022-11-03 01:49:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:47,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:47,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:47,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:47,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:47,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1231326467, now seen corresponding path program 1 times [2022-11-03 01:49:47,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:47,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691353528] [2022-11-03 01:49:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:47,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:47,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:47,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:49:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:48,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:48,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:48,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:48,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:48,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691353528] [2022-11-03 01:49:48,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691353528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:48,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:48,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:48,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319352749] [2022-11-03 01:49:48,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:48,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:48,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:48,540 INFO L87 Difference]: Start difference. First operand 283 states and 412 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:48,809 INFO L93 Difference]: Finished difference Result 1086 states and 1599 transitions. [2022-11-03 01:49:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:48,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:48,814 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:49:48,814 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:49:48,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:49:48,816 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1561 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1561 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:48,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1561 Valid, 2318 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:49:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 285. [2022-11-03 01:49:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4577464788732395) internal successors, (414), 284 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 414 transitions. [2022-11-03 01:49:48,832 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 414 transitions. Word has length 278 [2022-11-03 01:49:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:48,832 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 414 transitions. [2022-11-03 01:49:48,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 414 transitions. [2022-11-03 01:49:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:48,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:48,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:48,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:49,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:49,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:49,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:49,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1214038917, now seen corresponding path program 1 times [2022-11-03 01:49:49,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176969848] [2022-11-03 01:49:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:49,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:49,060 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:49,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:49:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:50,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:50,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:50,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176969848] [2022-11-03 01:49:50,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176969848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:50,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:50,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:50,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136770703] [2022-11-03 01:49:50,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:50,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:50,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:50,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:50,324 INFO L87 Difference]: Start difference. First operand 285 states and 414 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:50,627 INFO L93 Difference]: Finished difference Result 1086 states and 1598 transitions. [2022-11-03 01:49:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:50,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:50,634 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:49:50,634 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:49:50,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:49:50,639 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 1554 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:50,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1554 Valid, 2314 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:49:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 287. [2022-11-03 01:49:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4545454545454546) internal successors, (416), 286 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 416 transitions. [2022-11-03 01:49:50,655 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 416 transitions. Word has length 278 [2022-11-03 01:49:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:50,655 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 416 transitions. [2022-11-03 01:49:50,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 416 transitions. [2022-11-03 01:49:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:50,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:50,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:50,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:50,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:50,879 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1248546169, now seen corresponding path program 1 times [2022-11-03 01:49:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826857309] [2022-11-03 01:49:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:50,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:50,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:50,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:49:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:51,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:52,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:52,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826857309] [2022-11-03 01:49:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826857309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:52,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:52,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:52,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957865656] [2022-11-03 01:49:52,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:52,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:52,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:52,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:52,149 INFO L87 Difference]: Start difference. First operand 287 states and 416 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:52,477 INFO L93 Difference]: Finished difference Result 1086 states and 1597 transitions. [2022-11-03 01:49:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:52,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:52,482 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:49:52,483 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:49:52,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:49:52,487 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1546 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2324 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:52,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 2324 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:49:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:49:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 289. [2022-11-03 01:49:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.4513888888888888) internal successors, (418), 288 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 418 transitions. [2022-11-03 01:49:52,502 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 418 transitions. Word has length 278 [2022-11-03 01:49:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:52,505 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 418 transitions. [2022-11-03 01:49:52,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 418 transitions. [2022-11-03 01:49:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:52,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:52,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:52,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:52,728 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash 916486665, now seen corresponding path program 1 times [2022-11-03 01:49:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:52,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809382571] [2022-11-03 01:49:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:52,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:52,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:52,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:49:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:54,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:54,120 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:54,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809382571] [2022-11-03 01:49:54,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809382571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:54,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:54,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:54,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535576157] [2022-11-03 01:49:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:54,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:54,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:54,125 INFO L87 Difference]: Start difference. First operand 289 states and 418 transitions. Second operand has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:54,495 INFO L93 Difference]: Finished difference Result 828 states and 1215 transitions. [2022-11-03 01:49:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:54,498 INFO L225 Difference]: With dead ends: 828 [2022-11-03 01:49:54,499 INFO L226 Difference]: Without dead ends: 559 [2022-11-03 01:49:54,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:54,500 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1552 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:54,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 1963 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:49:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-11-03 01:49:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 291. [2022-11-03 01:49:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4482758620689655) internal successors, (420), 290 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 420 transitions. [2022-11-03 01:49:54,514 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 420 transitions. Word has length 278 [2022-11-03 01:49:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:54,514 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 420 transitions. [2022-11-03 01:49:54,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 420 transitions. [2022-11-03 01:49:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:54,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:54,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:54,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:54,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:54,739 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:54,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1705294343, now seen corresponding path program 1 times [2022-11-03 01:49:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:54,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430746872] [2022-11-03 01:49:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:54,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:54,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:54,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:54,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:49:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:49:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:55,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:55,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:55,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430746872] [2022-11-03 01:49:55,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430746872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:55,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:55,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:55,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869471159] [2022-11-03 01:49:55,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:55,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:55,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:55,945 INFO L87 Difference]: Start difference. First operand 291 states and 420 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:56,817 INFO L93 Difference]: Finished difference Result 1086 states and 1595 transitions. [2022-11-03 01:49:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:56,822 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:49:56,823 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:49:56,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:49:56,825 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1533 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:56,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1533 Valid, 2103 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:49:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:49:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 293. [2022-11-03 01:49:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.4452054794520548) internal successors, (422), 292 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 422 transitions. [2022-11-03 01:49:56,839 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 422 transitions. Word has length 278 [2022-11-03 01:49:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:56,840 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 422 transitions. [2022-11-03 01:49:56,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 422 transitions. [2022-11-03 01:49:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:56,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:56,846 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:56,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:57,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:57,074 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1530172041, now seen corresponding path program 1 times [2022-11-03 01:49:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:57,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163385156] [2022-11-03 01:49:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:57,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:57,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:57,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:57,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:49:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:58,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:58,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:58,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163385156] [2022-11-03 01:49:58,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163385156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:58,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:58,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:58,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178317328] [2022-11-03 01:49:58,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:58,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:58,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:58,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:58,185 INFO L87 Difference]: Start difference. First operand 293 states and 422 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:58,451 INFO L93 Difference]: Finished difference Result 1086 states and 1594 transitions. [2022-11-03 01:49:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:58,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:49:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:58,456 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:49:58,456 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:49:58,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:49:58,458 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1526 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:58,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 2298 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:49:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 295. [2022-11-03 01:49:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.4421768707482994) internal successors, (424), 294 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 424 transitions. [2022-11-03 01:49:58,472 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 424 transitions. Word has length 278 [2022-11-03 01:49:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:58,472 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 424 transitions. [2022-11-03 01:49:58,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 424 transitions. [2022-11-03 01:49:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:49:58,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:58,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:58,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:58,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:58,700 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:58,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1686414219, now seen corresponding path program 1 times [2022-11-03 01:49:58,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:58,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661004859] [2022-11-03 01:49:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:58,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:58,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:58,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:58,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:49:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:59,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:59,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:59,907 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:59,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661004859] [2022-11-03 01:49:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661004859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:59,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354872449] [2022-11-03 01:49:59,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:59,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:59,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:59,911 INFO L87 Difference]: Start difference. First operand 295 states and 424 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:00,185 INFO L93 Difference]: Finished difference Result 1094 states and 1605 transitions. [2022-11-03 01:50:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:00,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:00,195 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 01:50:00,195 INFO L226 Difference]: Without dead ends: 825 [2022-11-03 01:50:00,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:00,197 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 1535 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:00,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1535 Valid, 2305 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-11-03 01:50:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 297. [2022-11-03 01:50:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.4391891891891893) internal successors, (426), 296 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 426 transitions. [2022-11-03 01:50:00,229 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 426 transitions. Word has length 278 [2022-11-03 01:50:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:00,230 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 426 transitions. [2022-11-03 01:50:00,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 426 transitions. [2022-11-03 01:50:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:00,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:00,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:00,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:00,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:00,434 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1924592371, now seen corresponding path program 1 times [2022-11-03 01:50:00,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:00,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853819789] [2022-11-03 01:50:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:00,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:00,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:00,439 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:00,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:50:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:50:01,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:01,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:01,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853819789] [2022-11-03 01:50:01,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853819789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:01,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:01,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:50:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313428605] [2022-11-03 01:50:01,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:01,663 INFO L87 Difference]: Start difference. First operand 297 states and 426 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:01,907 INFO L93 Difference]: Finished difference Result 1075 states and 1581 transitions. [2022-11-03 01:50:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:50:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:01,912 INFO L225 Difference]: With dead ends: 1075 [2022-11-03 01:50:01,912 INFO L226 Difference]: Without dead ends: 806 [2022-11-03 01:50:01,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 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 01:50:01,914 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1113 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:01,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 1545 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-03 01:50:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 299. [2022-11-03 01:50:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.436241610738255) internal successors, (428), 298 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 428 transitions. [2022-11-03 01:50:01,929 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 428 transitions. Word has length 278 [2022-11-03 01:50:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:01,930 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 428 transitions. [2022-11-03 01:50:01,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 428 transitions. [2022-11-03 01:50:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:01,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:01,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:01,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:02,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:02,146 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:02,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2143153935, now seen corresponding path program 1 times [2022-11-03 01:50:02,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:02,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214846856] [2022-11-03 01:50:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:02,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:02,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:02,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:02,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:50:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:03,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:03,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:03,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214846856] [2022-11-03 01:50:03,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214846856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:03,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:03,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:03,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144842028] [2022-11-03 01:50:03,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:03,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:03,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:03,276 INFO L87 Difference]: Start difference. First operand 299 states and 428 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:03,549 INFO L93 Difference]: Finished difference Result 1086 states and 1591 transitions. [2022-11-03 01:50:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:03,555 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:50:03,556 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:50:03,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:03,563 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1505 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:03,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1505 Valid, 2286 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:50:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 301. [2022-11-03 01:50:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.4333333333333333) internal successors, (430), 300 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 430 transitions. [2022-11-03 01:50:03,589 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 430 transitions. Word has length 278 [2022-11-03 01:50:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:03,591 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 430 transitions. [2022-11-03 01:50:03,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 430 transitions. [2022-11-03 01:50:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:03,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:03,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:03,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:03,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:03,812 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2035848815, now seen corresponding path program 1 times [2022-11-03 01:50:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:03,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211761934] [2022-11-03 01:50:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:03,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:03,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:03,817 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:03,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:50:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:04,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:04,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:04,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211761934] [2022-11-03 01:50:04,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211761934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:04,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:04,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733815117] [2022-11-03 01:50:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:04,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:04,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:04,924 INFO L87 Difference]: Start difference. First operand 301 states and 430 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:05,203 INFO L93 Difference]: Finished difference Result 1104 states and 1617 transitions. [2022-11-03 01:50:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:05,208 INFO L225 Difference]: With dead ends: 1104 [2022-11-03 01:50:05,208 INFO L226 Difference]: Without dead ends: 835 [2022-11-03 01:50:05,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:05,210 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 1534 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:05,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1534 Valid, 2307 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-11-03 01:50:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 303. [2022-11-03 01:50:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.4304635761589404) internal successors, (432), 302 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 432 transitions. [2022-11-03 01:50:05,226 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 432 transitions. Word has length 278 [2022-11-03 01:50:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:05,227 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 432 transitions. [2022-11-03 01:50:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 432 transitions. [2022-11-03 01:50:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:05,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:05,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:05,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:05,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:05,444 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash 257006739, now seen corresponding path program 1 times [2022-11-03 01:50:05,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:05,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480833375] [2022-11-03 01:50:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:05,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:05,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:05,449 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:05,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:50:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:06,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:06,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:06,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:06,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480833375] [2022-11-03 01:50:06,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480833375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:06,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:06,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:50:06,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198699282] [2022-11-03 01:50:06,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:50:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:50:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:50:06,593 INFO L87 Difference]: Start difference. First operand 303 states and 432 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:07,680 INFO L93 Difference]: Finished difference Result 1686 states and 2474 transitions. [2022-11-03 01:50:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:50:07,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:07,686 INFO L225 Difference]: With dead ends: 1686 [2022-11-03 01:50:07,688 INFO L226 Difference]: Without dead ends: 1417 [2022-11-03 01:50:07,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:50:07,696 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 3552 mSDsluCounter, 4660 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3552 SdHoareTripleChecker+Valid, 5087 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:07,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3552 Valid, 5087 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:50:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2022-11-03 01:50:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 321. [2022-11-03 01:50:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.43125) internal successors, (458), 320 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 458 transitions. [2022-11-03 01:50:07,720 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 458 transitions. Word has length 278 [2022-11-03 01:50:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:07,721 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 458 transitions. [2022-11-03 01:50:07,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 458 transitions. [2022-11-03 01:50:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:07,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:07,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:07,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:07,937 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1416583147, now seen corresponding path program 1 times [2022-11-03 01:50:07,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:07,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007405102] [2022-11-03 01:50:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:07,942 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:07,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:50:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:50:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:09,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:09,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:09,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007405102] [2022-11-03 01:50:09,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007405102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:09,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:09,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578956021] [2022-11-03 01:50:09,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:09,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:09,222 INFO L87 Difference]: Start difference. First operand 321 states and 458 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:09,528 INFO L93 Difference]: Finished difference Result 1169 states and 1709 transitions. [2022-11-03 01:50:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:09,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:09,532 INFO L225 Difference]: With dead ends: 1169 [2022-11-03 01:50:09,533 INFO L226 Difference]: Without dead ends: 882 [2022-11-03 01:50:09,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:09,535 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1520 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:09,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 2314 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-11-03 01:50:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 325. [2022-11-03 01:50:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.4259259259259258) internal successors, (462), 324 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 462 transitions. [2022-11-03 01:50:09,552 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 462 transitions. Word has length 278 [2022-11-03 01:50:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:09,552 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 462 transitions. [2022-11-03 01:50:09,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 462 transitions. [2022-11-03 01:50:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:09,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:09,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:09,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:09,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:09,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:09,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:09,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1816089577, now seen corresponding path program 1 times [2022-11-03 01:50:09,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:09,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425568724] [2022-11-03 01:50:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:09,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:09,768 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:09,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:50:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:10,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:10,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:10,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425568724] [2022-11-03 01:50:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425568724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:10,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:10,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:10,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952862663] [2022-11-03 01:50:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:10,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:10,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:10,890 INFO L87 Difference]: Start difference. First operand 325 states and 462 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:11,147 INFO L93 Difference]: Finished difference Result 1184 states and 1730 transitions. [2022-11-03 01:50:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:11,152 INFO L225 Difference]: With dead ends: 1184 [2022-11-03 01:50:11,152 INFO L226 Difference]: Without dead ends: 897 [2022-11-03 01:50:11,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:11,154 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1524 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:11,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 2303 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-03 01:50:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 329. [2022-11-03 01:50:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.423780487804878) internal successors, (467), 328 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 467 transitions. [2022-11-03 01:50:11,171 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 467 transitions. Word has length 278 [2022-11-03 01:50:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:11,171 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 467 transitions. [2022-11-03 01:50:11,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 467 transitions. [2022-11-03 01:50:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:11,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:11,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:11,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:11,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:11,388 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash -519634663, now seen corresponding path program 1 times [2022-11-03 01:50:11,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967679956] [2022-11-03 01:50:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:11,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:11,391 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:11,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:50:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:12,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:12,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:12,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:12,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967679956] [2022-11-03 01:50:12,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967679956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:12,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:12,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:50:12,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321728660] [2022-11-03 01:50:12,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:12,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:50:12,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:50:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:50:12,400 INFO L87 Difference]: Start difference. First operand 329 states and 467 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:13,254 INFO L93 Difference]: Finished difference Result 1720 states and 2519 transitions. [2022-11-03 01:50:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:50:13,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:13,259 INFO L225 Difference]: With dead ends: 1720 [2022-11-03 01:50:13,259 INFO L226 Difference]: Without dead ends: 1433 [2022-11-03 01:50:13,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:50:13,264 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 3560 mSDsluCounter, 4665 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 5114 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:13,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 5114 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:50:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-11-03 01:50:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 337. [2022-11-03 01:50:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4226190476190477) internal successors, (478), 336 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2022-11-03 01:50:13,288 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 278 [2022-11-03 01:50:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:13,288 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2022-11-03 01:50:13,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2022-11-03 01:50:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:13,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:13,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:13,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:13,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:13,516 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1635602789, now seen corresponding path program 1 times [2022-11-03 01:50:13,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:13,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9628382] [2022-11-03 01:50:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:13,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:13,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:13,520 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:13,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:50:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:14,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:50:14,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:14,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:14,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:14,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9628382] [2022-11-03 01:50:14,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9628382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:14,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:14,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658697785] [2022-11-03 01:50:14,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:14,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:14,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:14,434 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:14,675 INFO L93 Difference]: Finished difference Result 1164 states and 1696 transitions. [2022-11-03 01:50:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:14,680 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 01:50:14,680 INFO L226 Difference]: Without dead ends: 869 [2022-11-03 01:50:14,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:14,682 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1458 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:14,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1458 Valid, 2277 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-03 01:50:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 341. [2022-11-03 01:50:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4176470588235295) internal successors, (482), 340 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2022-11-03 01:50:14,696 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 278 [2022-11-03 01:50:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:14,696 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2022-11-03 01:50:14,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2022-11-03 01:50:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:14,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:14,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:14,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:14,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:14,921 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1297099619, now seen corresponding path program 1 times [2022-11-03 01:50:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:14,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265714081] [2022-11-03 01:50:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:14,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:14,925 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:14,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:50:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:50:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:16,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:16,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:16,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265714081] [2022-11-03 01:50:16,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265714081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:16,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:16,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:16,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678106004] [2022-11-03 01:50:16,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:16,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:16,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:16,059 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:16,840 INFO L93 Difference]: Finished difference Result 1164 states and 1695 transitions. [2022-11-03 01:50:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:16,844 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 01:50:16,844 INFO L226 Difference]: Without dead ends: 869 [2022-11-03 01:50:16,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:16,846 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1451 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 2056 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:16,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1451 Valid, 2056 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:50:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-03 01:50:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 343. [2022-11-03 01:50:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.4152046783625731) internal successors, (484), 342 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 484 transitions. [2022-11-03 01:50:16,863 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 484 transitions. Word has length 278 [2022-11-03 01:50:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:16,864 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 484 transitions. [2022-11-03 01:50:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 484 transitions. [2022-11-03 01:50:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:16,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:16,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:16,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:17,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:17,090 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1265462497, now seen corresponding path program 1 times [2022-11-03 01:50:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179472709] [2022-11-03 01:50:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:17,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:17,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:17,093 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:17,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:50:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:18,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:18,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179472709] [2022-11-03 01:50:18,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179472709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:18,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:18,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582837746] [2022-11-03 01:50:18,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:18,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:18,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:18,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:18,192 INFO L87 Difference]: Start difference. First operand 343 states and 484 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:18,451 INFO L93 Difference]: Finished difference Result 1164 states and 1694 transitions. [2022-11-03 01:50:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:18,456 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 01:50:18,456 INFO L226 Difference]: Without dead ends: 869 [2022-11-03 01:50:18,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:18,458 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 1444 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:18,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1444 Valid, 2251 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-03 01:50:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 345. [2022-11-03 01:50:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.4127906976744187) internal successors, (486), 344 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 486 transitions. [2022-11-03 01:50:18,474 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 486 transitions. Word has length 278 [2022-11-03 01:50:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:18,474 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 486 transitions. [2022-11-03 01:50:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 486 transitions. [2022-11-03 01:50:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:18,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:18,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:18,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 01:50:18,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:18,692 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1840712225, now seen corresponding path program 1 times [2022-11-03 01:50:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:18,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118314589] [2022-11-03 01:50:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:18,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:18,695 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:18,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:50:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:19,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:19,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:19,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118314589] [2022-11-03 01:50:19,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118314589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:19,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:19,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:19,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082627797] [2022-11-03 01:50:19,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:19,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:19,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:19,839 INFO L87 Difference]: Start difference. First operand 345 states and 486 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:20,129 INFO L93 Difference]: Finished difference Result 1224 states and 1781 transitions. [2022-11-03 01:50:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:20,134 INFO L225 Difference]: With dead ends: 1224 [2022-11-03 01:50:20,134 INFO L226 Difference]: Without dead ends: 929 [2022-11-03 01:50:20,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:20,136 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1504 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:20,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1504 Valid, 2294 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-11-03 01:50:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 347. [2022-11-03 01:50:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.4104046242774566) internal successors, (488), 346 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 488 transitions. [2022-11-03 01:50:20,152 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 488 transitions. Word has length 278 [2022-11-03 01:50:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:20,153 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 488 transitions. [2022-11-03 01:50:20,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 488 transitions. [2022-11-03 01:50:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:20,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:20,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:20,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:20,372 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -600745565, now seen corresponding path program 1 times [2022-11-03 01:50:20,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:20,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703685011] [2022-11-03 01:50:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:20,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:20,376 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:20,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:50:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:21,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:50:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:21,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:21,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:21,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703685011] [2022-11-03 01:50:21,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703685011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:21,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:21,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:21,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121726375] [2022-11-03 01:50:21,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:21,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:21,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:21,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:21,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:21,523 INFO L87 Difference]: Start difference. First operand 347 states and 488 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:22,330 INFO L93 Difference]: Finished difference Result 1164 states and 1692 transitions. [2022-11-03 01:50:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:22,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:22,335 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 01:50:22,335 INFO L226 Difference]: Without dead ends: 869 [2022-11-03 01:50:22,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:22,337 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 1420 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:22,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1420 Valid, 2038 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:50:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-03 01:50:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 353. [2022-11-03 01:50:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.4090909090909092) internal successors, (496), 352 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 496 transitions. [2022-11-03 01:50:22,365 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 496 transitions. Word has length 278 [2022-11-03 01:50:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:22,366 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 496 transitions. [2022-11-03 01:50:22,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 496 transitions. [2022-11-03 01:50:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:22,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:22,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:22,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:22,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:22,584 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash 175501989, now seen corresponding path program 1 times [2022-11-03 01:50:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:22,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868470397] [2022-11-03 01:50:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:22,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:22,588 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:22,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:50:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:23,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:23,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:23,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:23,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868470397] [2022-11-03 01:50:23,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868470397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:23,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:23,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:23,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283837759] [2022-11-03 01:50:23,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:23,736 INFO L87 Difference]: Start difference. First operand 353 states and 496 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:23,999 INFO L93 Difference]: Finished difference Result 1164 states and 1691 transitions. [2022-11-03 01:50:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:24,004 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 01:50:24,004 INFO L226 Difference]: Without dead ends: 869 [2022-11-03 01:50:24,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:24,005 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 1413 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:24,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2233 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-03 01:50:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 355. [2022-11-03 01:50:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.4067796610169492) internal successors, (498), 354 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 498 transitions. [2022-11-03 01:50:24,024 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 498 transitions. Word has length 278 [2022-11-03 01:50:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:24,025 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 498 transitions. [2022-11-03 01:50:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 498 transitions. [2022-11-03 01:50:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:24,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:24,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:24,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:24,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:24,252 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1682906073, now seen corresponding path program 1 times [2022-11-03 01:50:24,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:24,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280384316] [2022-11-03 01:50:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:24,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:24,255 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:24,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:50:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:25,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:25,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:25,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280384316] [2022-11-03 01:50:25,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280384316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:25,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:25,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:25,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973600716] [2022-11-03 01:50:25,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:25,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:25,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:25,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:25,383 INFO L87 Difference]: Start difference. First operand 355 states and 498 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:25,612 INFO L93 Difference]: Finished difference Result 1232 states and 1790 transitions. [2022-11-03 01:50:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:25,616 INFO L225 Difference]: With dead ends: 1232 [2022-11-03 01:50:25,616 INFO L226 Difference]: Without dead ends: 937 [2022-11-03 01:50:25,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:25,618 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 1489 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:25,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2287 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-11-03 01:50:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 357. [2022-11-03 01:50:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.404494382022472) internal successors, (500), 356 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 500 transitions. [2022-11-03 01:50:25,632 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 500 transitions. Word has length 278 [2022-11-03 01:50:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:25,632 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 500 transitions. [2022-11-03 01:50:25,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 500 transitions. [2022-11-03 01:50:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:25,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:25,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:25,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:25,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:25,860 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash 849235497, now seen corresponding path program 1 times [2022-11-03 01:50:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:25,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892048546] [2022-11-03 01:50:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:25,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:25,863 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:25,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:50:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:50:26,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:27,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:27,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:27,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892048546] [2022-11-03 01:50:27,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892048546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:27,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:27,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403409778] [2022-11-03 01:50:27,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:27,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:27,089 INFO L87 Difference]: Start difference. First operand 357 states and 500 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:27,391 INFO L93 Difference]: Finished difference Result 1193 states and 1732 transitions. [2022-11-03 01:50:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:27,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:27,394 INFO L225 Difference]: With dead ends: 1193 [2022-11-03 01:50:27,394 INFO L226 Difference]: Without dead ends: 898 [2022-11-03 01:50:27,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:27,395 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1435 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:27,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 2265 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-03 01:50:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 359. [2022-11-03 01:50:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.4022346368715084) internal successors, (502), 358 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 502 transitions. [2022-11-03 01:50:27,411 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 502 transitions. Word has length 278 [2022-11-03 01:50:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:27,412 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 502 transitions. [2022-11-03 01:50:27,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 502 transitions. [2022-11-03 01:50:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:27,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:27,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:27,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 01:50:27,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:27,636 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash 847401131, now seen corresponding path program 1 times [2022-11-03 01:50:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:27,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806944626] [2022-11-03 01:50:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:27,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:27,643 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:27,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:50:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:28,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:28,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806944626] [2022-11-03 01:50:28,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806944626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:28,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:28,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:28,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044341050] [2022-11-03 01:50:28,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:28,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:28,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:28,723 INFO L87 Difference]: Start difference. First operand 359 states and 502 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:28,965 INFO L93 Difference]: Finished difference Result 1164 states and 1688 transitions. [2022-11-03 01:50:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:28,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:28,968 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 01:50:28,968 INFO L226 Difference]: Without dead ends: 869 [2022-11-03 01:50:28,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:28,969 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 1392 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:28,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1392 Valid, 2221 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-03 01:50:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 361. [2022-11-03 01:50:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.4) internal successors, (504), 360 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 504 transitions. [2022-11-03 01:50:28,986 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 504 transitions. Word has length 278 [2022-11-03 01:50:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:28,986 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 504 transitions. [2022-11-03 01:50:28,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 504 transitions. [2022-11-03 01:50:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:28,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:28,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:29,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:29,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:29,217 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1093209005, now seen corresponding path program 1 times [2022-11-03 01:50:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267646677] [2022-11-03 01:50:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:29,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:29,221 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:29,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:50:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:30,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:30,441 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:30,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267646677] [2022-11-03 01:50:30,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267646677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:30,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:30,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:30,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442957855] [2022-11-03 01:50:30,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:30,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:30,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:30,444 INFO L87 Difference]: Start difference. First operand 361 states and 504 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:30,710 INFO L93 Difference]: Finished difference Result 1242 states and 1802 transitions. [2022-11-03 01:50:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:30,713 INFO L225 Difference]: With dead ends: 1242 [2022-11-03 01:50:30,713 INFO L226 Difference]: Without dead ends: 947 [2022-11-03 01:50:30,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:50:30,715 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1486 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:30,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 2289 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-11-03 01:50:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 363. [2022-11-03 01:50:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.3977900552486189) internal successors, (506), 362 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 506 transitions. [2022-11-03 01:50:30,731 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 506 transitions. Word has length 278 [2022-11-03 01:50:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:30,731 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 506 transitions. [2022-11-03 01:50:30,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 506 transitions. [2022-11-03 01:50:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:30,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:30,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:30,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:30,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:30,960 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1223073583, now seen corresponding path program 1 times [2022-11-03 01:50:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:30,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602727498] [2022-11-03 01:50:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:30,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:30,964 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:30,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:50:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:32,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:32,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602727498] [2022-11-03 01:50:32,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602727498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:32,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:32,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:50:32,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899945600] [2022-11-03 01:50:32,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:32,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:50:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:32,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:50:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:50:32,129 INFO L87 Difference]: Start difference. First operand 363 states and 506 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:33,105 INFO L93 Difference]: Finished difference Result 1780 states and 2595 transitions. [2022-11-03 01:50:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:50:33,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:33,111 INFO L225 Difference]: With dead ends: 1780 [2022-11-03 01:50:33,111 INFO L226 Difference]: Without dead ends: 1485 [2022-11-03 01:50:33,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:50:33,114 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 4053 mSDsluCounter, 4696 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4053 SdHoareTripleChecker+Valid, 5247 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:33,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4053 Valid, 5247 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:50:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2022-11-03 01:50:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 389. [2022-11-03 01:50:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.402061855670103) internal successors, (544), 388 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 544 transitions. [2022-11-03 01:50:33,133 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 544 transitions. Word has length 278 [2022-11-03 01:50:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:33,134 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 544 transitions. [2022-11-03 01:50:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 544 transitions. [2022-11-03 01:50:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:33,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:33,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:33,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:33,352 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash -90756303, now seen corresponding path program 1 times [2022-11-03 01:50:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:33,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913969477] [2022-11-03 01:50:33,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:33,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:33,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:33,356 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:33,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:50:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:34,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:34,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:34,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913969477] [2022-11-03 01:50:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913969477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:34,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:34,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:34,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614263646] [2022-11-03 01:50:34,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:34,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:34,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:34,719 INFO L87 Difference]: Start difference. First operand 389 states and 544 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:36,669 INFO L93 Difference]: Finished difference Result 2012 states and 2928 transitions. [2022-11-03 01:50:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:36,674 INFO L225 Difference]: With dead ends: 2012 [2022-11-03 01:50:36,674 INFO L226 Difference]: Without dead ends: 1691 [2022-11-03 01:50:36,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:36,677 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 3513 mSDsluCounter, 3376 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:36,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3833 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:50:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-11-03 01:50:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 449. [2022-11-03 01:50:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.4084821428571428) internal successors, (631), 448 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 631 transitions. [2022-11-03 01:50:36,695 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 631 transitions. Word has length 278 [2022-11-03 01:50:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:36,695 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 631 transitions. [2022-11-03 01:50:36,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 631 transitions. [2022-11-03 01:50:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:36,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:36,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:36,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:36,921 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1226700749, now seen corresponding path program 1 times [2022-11-03 01:50:36,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:36,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926394530] [2022-11-03 01:50:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:36,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:36,924 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:36,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:50:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:37,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:37,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:38,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:38,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926394530] [2022-11-03 01:50:38,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926394530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:38,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:38,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735359831] [2022-11-03 01:50:38,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:38,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:38,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:38,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:38,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:38,144 INFO L87 Difference]: Start difference. First operand 449 states and 631 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:40,090 INFO L93 Difference]: Finished difference Result 2074 states and 3016 transitions. [2022-11-03 01:50:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:40,094 INFO L225 Difference]: With dead ends: 2074 [2022-11-03 01:50:40,095 INFO L226 Difference]: Without dead ends: 1693 [2022-11-03 01:50:40,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:40,096 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 3513 mSDsluCounter, 3377 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3838 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:40,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3838 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:50:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2022-11-03 01:50:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 451. [2022-11-03 01:50:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.4066666666666667) internal successors, (633), 450 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 633 transitions. [2022-11-03 01:50:40,117 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 633 transitions. Word has length 278 [2022-11-03 01:50:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:40,118 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 633 transitions. [2022-11-03 01:50:40,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 633 transitions. [2022-11-03 01:50:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:40,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:40,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:40,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 01:50:40,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:40,343 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:40,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1793342901, now seen corresponding path program 1 times [2022-11-03 01:50:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924930324] [2022-11-03 01:50:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:40,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:40,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:40,348 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:40,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 01:50:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:41,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:41,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924930324] [2022-11-03 01:50:41,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924930324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:41,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:41,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976293699] [2022-11-03 01:50:41,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:41,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:41,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:41,669 INFO L87 Difference]: Start difference. First operand 451 states and 633 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:43,650 INFO L93 Difference]: Finished difference Result 2078 states and 3019 transitions. [2022-11-03 01:50:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:43,654 INFO L225 Difference]: With dead ends: 2078 [2022-11-03 01:50:43,654 INFO L226 Difference]: Without dead ends: 1695 [2022-11-03 01:50:43,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:43,656 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 3513 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3843 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:43,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3843 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:50:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-11-03 01:50:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 453. [2022-11-03 01:50:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.404867256637168) internal successors, (635), 452 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 635 transitions. [2022-11-03 01:50:43,675 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 635 transitions. Word has length 278 [2022-11-03 01:50:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:43,675 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 635 transitions. [2022-11-03 01:50:43,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 635 transitions. [2022-11-03 01:50:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:43,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:43,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:43,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 01:50:43,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:43,878 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash -174462025, now seen corresponding path program 1 times [2022-11-03 01:50:43,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:43,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920684452] [2022-11-03 01:50:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:43,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:43,881 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:43,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:50:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:44,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:44,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920684452] [2022-11-03 01:50:44,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920684452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:44,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:44,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:44,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948708720] [2022-11-03 01:50:44,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:44,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:44,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:44,993 INFO L87 Difference]: Start difference. First operand 453 states and 635 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:46,546 INFO L93 Difference]: Finished difference Result 2082 states and 3022 transitions. [2022-11-03 01:50:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:46,548 INFO L225 Difference]: With dead ends: 2082 [2022-11-03 01:50:46,548 INFO L226 Difference]: Without dead ends: 1697 [2022-11-03 01:50:46,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:46,549 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 3513 mSDsluCounter, 3379 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3848 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:46,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3848 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 01:50:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-11-03 01:50:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 455. [2022-11-03 01:50:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.4030837004405285) internal successors, (637), 454 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 637 transitions. [2022-11-03 01:50:46,567 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 637 transitions. Word has length 278 [2022-11-03 01:50:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:46,567 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 637 transitions. [2022-11-03 01:50:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 637 transitions. [2022-11-03 01:50:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:46,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:46,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:46,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 01:50:46,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:46,770 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash 109523513, now seen corresponding path program 1 times [2022-11-03 01:50:46,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:46,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155920580] [2022-11-03 01:50:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:46,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:46,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:46,773 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:46,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 01:50:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:47,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:47,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:47,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:47,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155920580] [2022-11-03 01:50:47,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155920580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:47,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:47,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:47,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530613530] [2022-11-03 01:50:47,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:47,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:47,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:47,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:47,901 INFO L87 Difference]: Start difference. First operand 455 states and 637 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:49,648 INFO L93 Difference]: Finished difference Result 2086 states and 3025 transitions. [2022-11-03 01:50:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:49,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:49,650 INFO L225 Difference]: With dead ends: 2086 [2022-11-03 01:50:49,650 INFO L226 Difference]: Without dead ends: 1699 [2022-11-03 01:50:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:49,652 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 3513 mSDsluCounter, 3380 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:49,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3853 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-03 01:50:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 457. [2022-11-03 01:50:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.4013157894736843) internal successors, (639), 456 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 639 transitions. [2022-11-03 01:50:49,668 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 639 transitions. Word has length 278 [2022-11-03 01:50:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:49,668 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 639 transitions. [2022-11-03 01:50:49,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 639 transitions. [2022-11-03 01:50:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:49,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:49,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:49,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 01:50:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:49,870 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1615318725, now seen corresponding path program 1 times [2022-11-03 01:50:49,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:49,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953179834] [2022-11-03 01:50:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:49,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:49,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:49,873 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:49,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 01:50:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:50,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:51,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:51,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:51,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953179834] [2022-11-03 01:50:51,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953179834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:51,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:51,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:51,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157650741] [2022-11-03 01:50:51,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:51,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:51,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:51,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:51,110 INFO L87 Difference]: Start difference. First operand 457 states and 639 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:53,056 INFO L93 Difference]: Finished difference Result 2090 states and 3028 transitions. [2022-11-03 01:50:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:53,058 INFO L225 Difference]: With dead ends: 2090 [2022-11-03 01:50:53,058 INFO L226 Difference]: Without dead ends: 1701 [2022-11-03 01:50:53,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:53,060 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 3513 mSDsluCounter, 3381 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3858 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:53,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3858 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:50:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-11-03 01:50:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 459. [2022-11-03 01:50:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.3995633187772927) internal successors, (641), 458 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 641 transitions. [2022-11-03 01:50:53,081 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 641 transitions. Word has length 278 [2022-11-03 01:50:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:53,082 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 641 transitions. [2022-11-03 01:50:53,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 641 transitions. [2022-11-03 01:50:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:53,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:53,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:53,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:53,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:53,313 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash 398526653, now seen corresponding path program 1 times [2022-11-03 01:50:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046855917] [2022-11-03 01:50:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:53,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:53,318 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:53,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:50:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:54,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:54,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:54,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046855917] [2022-11-03 01:50:54,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046855917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:54,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:54,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:54,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519895072] [2022-11-03 01:50:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:54,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:54,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:54,618 INFO L87 Difference]: Start difference. First operand 459 states and 641 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:56,499 INFO L93 Difference]: Finished difference Result 2096 states and 3034 transitions. [2022-11-03 01:50:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:56,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:56,501 INFO L225 Difference]: With dead ends: 2096 [2022-11-03 01:50:56,501 INFO L226 Difference]: Without dead ends: 1705 [2022-11-03 01:50:56,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:56,503 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 3517 mSDsluCounter, 3386 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:56,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3873 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 01:50:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-11-03 01:50:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 463. [2022-11-03 01:50:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.3982683982683983) internal successors, (646), 462 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 646 transitions. [2022-11-03 01:50:56,523 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 646 transitions. Word has length 278 [2022-11-03 01:50:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:56,524 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 646 transitions. [2022-11-03 01:50:56,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 646 transitions. [2022-11-03 01:50:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:56,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:56,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:56,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:50:56,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:56,727 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:56,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1386876609, now seen corresponding path program 1 times [2022-11-03 01:50:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:56,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813548767] [2022-11-03 01:50:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:56,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:56,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:56,731 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:56,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 01:50:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:57,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:57,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:57,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:57,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813548767] [2022-11-03 01:50:57,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813548767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:57,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:57,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:57,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263794553] [2022-11-03 01:50:57,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:57,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:57,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:57,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:57,980 INFO L87 Difference]: Start difference. First operand 463 states and 646 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:59,718 INFO L93 Difference]: Finished difference Result 2102 states and 3040 transitions. [2022-11-03 01:50:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:50:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:59,721 INFO L225 Difference]: With dead ends: 2102 [2022-11-03 01:50:59,721 INFO L226 Difference]: Without dead ends: 1707 [2022-11-03 01:50:59,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:59,722 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 3517 mSDsluCounter, 3387 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3878 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:59,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3878 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2022-11-03 01:50:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 465. [2022-11-03 01:50:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.396551724137931) internal successors, (648), 464 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 648 transitions. [2022-11-03 01:50:59,743 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 648 transitions. Word has length 278 [2022-11-03 01:50:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:59,743 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 648 transitions. [2022-11-03 01:50:59,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 648 transitions. [2022-11-03 01:50:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:50:59,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:59,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:59,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 01:50:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:59,964 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1263594943, now seen corresponding path program 1 times [2022-11-03 01:50:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:59,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679268303] [2022-11-03 01:50:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:59,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:59,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:59,967 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:59,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 01:51:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:00,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:01,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:01,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679268303] [2022-11-03 01:51:01,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679268303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:01,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:01,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452280762] [2022-11-03 01:51:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:01,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:01,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:01,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:01,332 INFO L87 Difference]: Start difference. First operand 465 states and 648 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:03,072 INFO L93 Difference]: Finished difference Result 2106 states and 3043 transitions. [2022-11-03 01:51:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:03,075 INFO L225 Difference]: With dead ends: 2106 [2022-11-03 01:51:03,075 INFO L226 Difference]: Without dead ends: 1709 [2022-11-03 01:51:03,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:03,077 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 3517 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3883 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:03,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3883 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:51:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-11-03 01:51:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 467. [2022-11-03 01:51:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.3948497854077253) internal successors, (650), 466 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 650 transitions. [2022-11-03 01:51:03,097 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 650 transitions. Word has length 278 [2022-11-03 01:51:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:03,098 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 650 transitions. [2022-11-03 01:51:03,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 650 transitions. [2022-11-03 01:51:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:03,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:03,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:03,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 01:51:03,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:03,320 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash -360674365, now seen corresponding path program 1 times [2022-11-03 01:51:03,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:03,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527218714] [2022-11-03 01:51:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:03,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:03,323 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:03,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:51:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:04,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:04,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:04,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527218714] [2022-11-03 01:51:04,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527218714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:04,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:04,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:04,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920078055] [2022-11-03 01:51:04,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:04,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:04,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:04,500 INFO L87 Difference]: Start difference. First operand 467 states and 650 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:06,101 INFO L93 Difference]: Finished difference Result 2110 states and 3046 transitions. [2022-11-03 01:51:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:06,104 INFO L225 Difference]: With dead ends: 2110 [2022-11-03 01:51:06,104 INFO L226 Difference]: Without dead ends: 1711 [2022-11-03 01:51:06,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:06,106 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 3517 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3888 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:06,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3888 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 01:51:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-11-03 01:51:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 469. [2022-11-03 01:51:06,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.393162393162393) internal successors, (652), 468 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 652 transitions. [2022-11-03 01:51:06,124 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 652 transitions. Word has length 278 [2022-11-03 01:51:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:06,124 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 652 transitions. [2022-11-03 01:51:06,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 652 transitions. [2022-11-03 01:51:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:06,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:06,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:06,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 01:51:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:06,349 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:06,350 INFO L85 PathProgramCache]: Analyzing trace with hash -368673339, now seen corresponding path program 1 times [2022-11-03 01:51:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:06,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163439485] [2022-11-03 01:51:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:06,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:06,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:06,353 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:06,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 01:51:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:07,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:07,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:07,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:07,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:07,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163439485] [2022-11-03 01:51:07,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163439485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:07,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:07,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:07,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947798630] [2022-11-03 01:51:07,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:07,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:07,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:07,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:07,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:07,540 INFO L87 Difference]: Start difference. First operand 469 states and 652 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:09,189 INFO L93 Difference]: Finished difference Result 2114 states and 3049 transitions. [2022-11-03 01:51:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:09,191 INFO L225 Difference]: With dead ends: 2114 [2022-11-03 01:51:09,191 INFO L226 Difference]: Without dead ends: 1713 [2022-11-03 01:51:09,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:09,193 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 3517 mSDsluCounter, 3390 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:09,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3893 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 01:51:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-03 01:51:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 471. [2022-11-03 01:51:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.3914893617021276) internal successors, (654), 470 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 654 transitions. [2022-11-03 01:51:09,217 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 654 transitions. Word has length 278 [2022-11-03 01:51:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:09,218 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 654 transitions. [2022-11-03 01:51:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 654 transitions. [2022-11-03 01:51:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:09,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:09,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:09,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:09,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:09,444 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash 788858951, now seen corresponding path program 1 times [2022-11-03 01:51:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:09,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202369483] [2022-11-03 01:51:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:09,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:09,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:09,447 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:09,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:51:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:10,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:10,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202369483] [2022-11-03 01:51:10,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202369483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:10,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:10,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:10,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8548404] [2022-11-03 01:51:10,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:10,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:10,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:10,769 INFO L87 Difference]: Start difference. First operand 471 states and 654 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:12,327 INFO L93 Difference]: Finished difference Result 2118 states and 3052 transitions. [2022-11-03 01:51:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:12,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:12,330 INFO L225 Difference]: With dead ends: 2118 [2022-11-03 01:51:12,330 INFO L226 Difference]: Without dead ends: 1715 [2022-11-03 01:51:12,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:12,332 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 3517 mSDsluCounter, 3391 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3898 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:12,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3898 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 01:51:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-03 01:51:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 473. [2022-11-03 01:51:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.3898305084745763) internal successors, (656), 472 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 656 transitions. [2022-11-03 01:51:12,350 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 656 transitions. Word has length 278 [2022-11-03 01:51:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:12,350 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 656 transitions. [2022-11-03 01:51:12,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 656 transitions. [2022-11-03 01:51:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:12,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:12,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:12,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:12,576 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1748481207, now seen corresponding path program 1 times [2022-11-03 01:51:12,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:12,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488201733] [2022-11-03 01:51:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:12,579 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:12,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:51:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:13,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:13,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:13,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:13,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488201733] [2022-11-03 01:51:13,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488201733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:13,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:13,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:13,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409328623] [2022-11-03 01:51:13,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:13,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:13,962 INFO L87 Difference]: Start difference. First operand 473 states and 656 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:15,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:15,681 INFO L93 Difference]: Finished difference Result 2122 states and 3055 transitions. [2022-11-03 01:51:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:15,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:15,685 INFO L225 Difference]: With dead ends: 2122 [2022-11-03 01:51:15,685 INFO L226 Difference]: Without dead ends: 1717 [2022-11-03 01:51:15,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:15,687 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 3517 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3903 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:15,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3903 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:51:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-11-03 01:51:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 475. [2022-11-03 01:51:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.3881856540084387) internal successors, (658), 474 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 658 transitions. [2022-11-03 01:51:15,706 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 658 transitions. Word has length 278 [2022-11-03 01:51:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:15,707 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 658 transitions. [2022-11-03 01:51:15,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 658 transitions. [2022-11-03 01:51:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:15,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:15,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:15,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:15,938 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1730438859, now seen corresponding path program 1 times [2022-11-03 01:51:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:15,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410058883] [2022-11-03 01:51:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:15,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:15,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:15,943 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:15,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 01:51:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:16,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:17,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:17,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:17,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410058883] [2022-11-03 01:51:17,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410058883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:17,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:17,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:17,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411119569] [2022-11-03 01:51:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:17,165 INFO L87 Difference]: Start difference. First operand 475 states and 658 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:18,754 INFO L93 Difference]: Finished difference Result 2126 states and 3058 transitions. [2022-11-03 01:51:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:18,756 INFO L225 Difference]: With dead ends: 2126 [2022-11-03 01:51:18,756 INFO L226 Difference]: Without dead ends: 1719 [2022-11-03 01:51:18,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:18,757 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 3517 mSDsluCounter, 3393 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 3908 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:18,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 3908 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 01:51:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-03 01:51:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 477. [2022-11-03 01:51:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.3865546218487395) internal successors, (660), 476 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 660 transitions. [2022-11-03 01:51:18,775 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 660 transitions. Word has length 278 [2022-11-03 01:51:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:18,776 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 660 transitions. [2022-11-03 01:51:18,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 660 transitions. [2022-11-03 01:51:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:18,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:18,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:18,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 01:51:19,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:19,003 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash -965379379, now seen corresponding path program 1 times [2022-11-03 01:51:19,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:19,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459337817] [2022-11-03 01:51:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:19,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:19,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:19,006 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:19,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:51:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:20,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:20,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:20,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459337817] [2022-11-03 01:51:20,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459337817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:20,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:20,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:20,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127359305] [2022-11-03 01:51:20,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:20,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:20,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:20,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:20,258 INFO L87 Difference]: Start difference. First operand 477 states and 660 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:22,452 INFO L93 Difference]: Finished difference Result 2266 states and 3264 transitions. [2022-11-03 01:51:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:22,453 INFO L225 Difference]: With dead ends: 2266 [2022-11-03 01:51:22,454 INFO L226 Difference]: Without dead ends: 1857 [2022-11-03 01:51:22,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:22,454 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 3940 mSDsluCounter, 4636 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3940 SdHoareTripleChecker+Valid, 5161 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:22,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3940 Valid, 5161 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:51:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-03 01:51:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 481. [2022-11-03 01:51:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.3854166666666667) internal successors, (665), 480 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 665 transitions. [2022-11-03 01:51:22,475 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 665 transitions. Word has length 278 [2022-11-03 01:51:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:22,475 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 665 transitions. [2022-11-03 01:51:22,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:22,476 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 665 transitions. [2022-11-03 01:51:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:22,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:22,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:22,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 01:51:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:22,692 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -437985329, now seen corresponding path program 1 times [2022-11-03 01:51:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:22,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463643836] [2022-11-03 01:51:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:22,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:22,695 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:22,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:51:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:23,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:23,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:23,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:23,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463643836] [2022-11-03 01:51:23,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463643836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:23,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:23,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:23,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716473690] [2022-11-03 01:51:23,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:23,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:23,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:23,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:23,973 INFO L87 Difference]: Start difference. First operand 481 states and 665 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:26,154 INFO L93 Difference]: Finished difference Result 2278 states and 3278 transitions. [2022-11-03 01:51:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:26,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:26,156 INFO L225 Difference]: With dead ends: 2278 [2022-11-03 01:51:26,156 INFO L226 Difference]: Without dead ends: 1865 [2022-11-03 01:51:26,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:26,162 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 3943 mSDsluCounter, 4637 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3943 SdHoareTripleChecker+Valid, 5166 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:26,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3943 Valid, 5166 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:51:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-11-03 01:51:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 483. [2022-11-03 01:51:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.383817427385892) internal successors, (667), 482 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 667 transitions. [2022-11-03 01:51:26,174 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 667 transitions. Word has length 278 [2022-11-03 01:51:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:26,175 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 667 transitions. [2022-11-03 01:51:26,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 667 transitions. [2022-11-03 01:51:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:26,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:26,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:26,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-03 01:51:26,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:26,377 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash 210607441, now seen corresponding path program 1 times [2022-11-03 01:51:26,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:26,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840303486] [2022-11-03 01:51:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:26,380 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:26,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:51:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:27,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:27,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:27,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:27,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840303486] [2022-11-03 01:51:27,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840303486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:27,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:27,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:27,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232721364] [2022-11-03 01:51:27,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:27,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:27,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:27,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:27,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:27,693 INFO L87 Difference]: Start difference. First operand 483 states and 667 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:29,784 INFO L93 Difference]: Finished difference Result 2288 states and 3289 transitions. [2022-11-03 01:51:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:29,787 INFO L225 Difference]: With dead ends: 2288 [2022-11-03 01:51:29,787 INFO L226 Difference]: Without dead ends: 1873 [2022-11-03 01:51:29,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:29,789 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 3946 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3946 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:29,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3946 Valid, 5171 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-11-03 01:51:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 485. [2022-11-03 01:51:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.3822314049586777) internal successors, (669), 484 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 669 transitions. [2022-11-03 01:51:29,808 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 669 transitions. Word has length 278 [2022-11-03 01:51:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:29,809 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 669 transitions. [2022-11-03 01:51:29,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 669 transitions. [2022-11-03 01:51:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:29,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:29,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:29,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:30,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:30,032 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 300667731, now seen corresponding path program 1 times [2022-11-03 01:51:30,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:30,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639027649] [2022-11-03 01:51:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:30,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:30,035 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:30,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:51:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:30,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:31,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:31,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:31,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639027649] [2022-11-03 01:51:31,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639027649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:31,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:31,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:31,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144573097] [2022-11-03 01:51:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:31,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:31,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:31,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:31,252 INFO L87 Difference]: Start difference. First operand 485 states and 669 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:33,266 INFO L93 Difference]: Finished difference Result 2298 states and 3300 transitions. [2022-11-03 01:51:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:33,268 INFO L225 Difference]: With dead ends: 2298 [2022-11-03 01:51:33,268 INFO L226 Difference]: Without dead ends: 1881 [2022-11-03 01:51:33,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:33,269 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 3949 mSDsluCounter, 4639 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3949 SdHoareTripleChecker+Valid, 5176 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:33,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3949 Valid, 5176 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:51:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-11-03 01:51:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 487. [2022-11-03 01:51:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.3806584362139918) internal successors, (671), 486 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 671 transitions. [2022-11-03 01:51:33,285 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 671 transitions. Word has length 278 [2022-11-03 01:51:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:33,285 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 671 transitions. [2022-11-03 01:51:33,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 671 transitions. [2022-11-03 01:51:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:33,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:33,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:33,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 01:51:33,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:33,488 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:33,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1107058219, now seen corresponding path program 1 times [2022-11-03 01:51:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:33,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887782228] [2022-11-03 01:51:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:33,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:33,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:33,491 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:33,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 01:51:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:34,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:34,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887782228] [2022-11-03 01:51:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887782228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:34,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:34,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111088451] [2022-11-03 01:51:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:34,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:34,718 INFO L87 Difference]: Start difference. First operand 487 states and 671 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:36,815 INFO L93 Difference]: Finished difference Result 2308 states and 3311 transitions. [2022-11-03 01:51:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:36,817 INFO L225 Difference]: With dead ends: 2308 [2022-11-03 01:51:36,817 INFO L226 Difference]: Without dead ends: 1889 [2022-11-03 01:51:36,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:36,818 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 3952 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3952 SdHoareTripleChecker+Valid, 5181 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:36,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3952 Valid, 5181 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-11-03 01:51:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 489. [2022-11-03 01:51:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.3790983606557377) internal successors, (673), 488 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 673 transitions. [2022-11-03 01:51:36,839 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 673 transitions. Word has length 278 [2022-11-03 01:51:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:36,839 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 673 transitions. [2022-11-03 01:51:36,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 673 transitions. [2022-11-03 01:51:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:36,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:36,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:36,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:37,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:37,056 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:37,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:37,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1264658647, now seen corresponding path program 1 times [2022-11-03 01:51:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:37,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710949487] [2022-11-03 01:51:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:37,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:37,059 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:37,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:51:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:37,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:38,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:38,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:38,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710949487] [2022-11-03 01:51:38,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710949487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:38,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:38,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:38,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354935551] [2022-11-03 01:51:38,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:38,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:38,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:38,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:38,290 INFO L87 Difference]: Start difference. First operand 489 states and 673 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:40,379 INFO L93 Difference]: Finished difference Result 2318 states and 3322 transitions. [2022-11-03 01:51:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:40,383 INFO L225 Difference]: With dead ends: 2318 [2022-11-03 01:51:40,383 INFO L226 Difference]: Without dead ends: 1897 [2022-11-03 01:51:40,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:40,384 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 3955 mSDsluCounter, 4641 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3955 SdHoareTripleChecker+Valid, 5186 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:40,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3955 Valid, 5186 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-11-03 01:51:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 491. [2022-11-03 01:51:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.3775510204081634) internal successors, (675), 490 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 675 transitions. [2022-11-03 01:51:40,401 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 675 transitions. Word has length 278 [2022-11-03 01:51:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:40,401 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 675 transitions. [2022-11-03 01:51:40,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 675 transitions. [2022-11-03 01:51:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:40,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:40,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:40,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 01:51:40,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:40,608 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1763215449, now seen corresponding path program 1 times [2022-11-03 01:51:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:40,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744572165] [2022-11-03 01:51:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:40,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:40,612 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:40,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 01:51:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:41,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:41,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:41,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744572165] [2022-11-03 01:51:41,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744572165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:41,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:41,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:41,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181452884] [2022-11-03 01:51:41,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:41,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:41,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:41,808 INFO L87 Difference]: Start difference. First operand 491 states and 675 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:43,786 INFO L93 Difference]: Finished difference Result 2336 states and 3345 transitions. [2022-11-03 01:51:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:43,788 INFO L225 Difference]: With dead ends: 2336 [2022-11-03 01:51:43,788 INFO L226 Difference]: Without dead ends: 1913 [2022-11-03 01:51:43,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:43,790 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 3965 mSDsluCounter, 4646 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3965 SdHoareTripleChecker+Valid, 5201 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:43,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3965 Valid, 5201 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:51:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-11-03 01:51:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 495. [2022-11-03 01:51:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.3765182186234817) internal successors, (680), 494 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 680 transitions. [2022-11-03 01:51:43,801 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 680 transitions. Word has length 278 [2022-11-03 01:51:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:43,802 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 680 transitions. [2022-11-03 01:51:43,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 680 transitions. [2022-11-03 01:51:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:43,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:43,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:43,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:44,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:44,028 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1864369957, now seen corresponding path program 1 times [2022-11-03 01:51:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:44,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594659898] [2022-11-03 01:51:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:44,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:44,031 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:44,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 01:51:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:44,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:44,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:45,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:45,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:45,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594659898] [2022-11-03 01:51:45,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594659898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:45,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:45,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:45,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34110836] [2022-11-03 01:51:45,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:45,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:45,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:45,226 INFO L87 Difference]: Start difference. First operand 495 states and 680 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:47,185 INFO L93 Difference]: Finished difference Result 2348 states and 3359 transitions. [2022-11-03 01:51:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:47,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:47,188 INFO L225 Difference]: With dead ends: 2348 [2022-11-03 01:51:47,188 INFO L226 Difference]: Without dead ends: 1921 [2022-11-03 01:51:47,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:47,189 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 3968 mSDsluCounter, 4647 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 5206 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:47,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3968 Valid, 5206 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:51:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-11-03 01:51:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 497. [2022-11-03 01:51:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.375) internal successors, (682), 496 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 682 transitions. [2022-11-03 01:51:47,201 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 682 transitions. Word has length 278 [2022-11-03 01:51:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:47,201 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 682 transitions. [2022-11-03 01:51:47,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 682 transitions. [2022-11-03 01:51:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:47,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:47,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:47,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 01:51:47,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:47,403 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1519541795, now seen corresponding path program 1 times [2022-11-03 01:51:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:47,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214263481] [2022-11-03 01:51:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:47,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:47,406 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:47,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:51:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:48,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:48,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:48,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214263481] [2022-11-03 01:51:48,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214263481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:48,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:48,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:48,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705748356] [2022-11-03 01:51:48,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:48,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:48,604 INFO L87 Difference]: Start difference. First operand 497 states and 682 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:50,671 INFO L93 Difference]: Finished difference Result 2358 states and 3370 transitions. [2022-11-03 01:51:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:50,673 INFO L225 Difference]: With dead ends: 2358 [2022-11-03 01:51:50,673 INFO L226 Difference]: Without dead ends: 1929 [2022-11-03 01:51:50,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:50,674 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 3971 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3971 SdHoareTripleChecker+Valid, 5211 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:50,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3971 Valid, 5211 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-11-03 01:51:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 499. [2022-11-03 01:51:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.3734939759036144) internal successors, (684), 498 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 684 transitions. [2022-11-03 01:51:50,686 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 684 transitions. Word has length 278 [2022-11-03 01:51:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:50,687 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 684 transitions. [2022-11-03 01:51:50,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 684 transitions. [2022-11-03 01:51:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:50,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:50,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:50,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:50,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:50,889 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:50,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1005953887, now seen corresponding path program 1 times [2022-11-03 01:51:50,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:50,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961252899] [2022-11-03 01:51:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:50,892 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:50,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 01:51:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:52,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:52,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:52,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961252899] [2022-11-03 01:51:52,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961252899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:52,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:52,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:52,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273448190] [2022-11-03 01:51:52,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:52,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:52,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:52,122 INFO L87 Difference]: Start difference. First operand 499 states and 684 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:54,142 INFO L93 Difference]: Finished difference Result 2368 states and 3381 transitions. [2022-11-03 01:51:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:54,145 INFO L225 Difference]: With dead ends: 2368 [2022-11-03 01:51:54,145 INFO L226 Difference]: Without dead ends: 1937 [2022-11-03 01:51:54,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:54,146 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 3974 mSDsluCounter, 4649 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 5216 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:54,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3974 Valid, 5216 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:51:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-11-03 01:51:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 501. [2022-11-03 01:51:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.372) internal successors, (686), 500 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 686 transitions. [2022-11-03 01:51:54,157 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 686 transitions. Word has length 278 [2022-11-03 01:51:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:54,157 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 686 transitions. [2022-11-03 01:51:54,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 686 transitions. [2022-11-03 01:51:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:54,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:54,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:54,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:54,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:54,368 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -399237791, now seen corresponding path program 1 times [2022-11-03 01:51:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:54,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250907688] [2022-11-03 01:51:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:54,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:54,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:54,371 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:54,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 01:51:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:55,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:55,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:55,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250907688] [2022-11-03 01:51:55,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250907688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:55,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:55,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:55,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229344834] [2022-11-03 01:51:55,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:55,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:55,581 INFO L87 Difference]: Start difference. First operand 501 states and 686 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:57,639 INFO L93 Difference]: Finished difference Result 2378 states and 3392 transitions. [2022-11-03 01:51:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:57,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:51:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:57,640 INFO L225 Difference]: With dead ends: 2378 [2022-11-03 01:51:57,641 INFO L226 Difference]: Without dead ends: 1945 [2022-11-03 01:51:57,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:57,641 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 3977 mSDsluCounter, 4650 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3977 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:57,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3977 Valid, 5221 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-11-03 01:51:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 503. [2022-11-03 01:51:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.3705179282868525) internal successors, (688), 502 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 688 transitions. [2022-11-03 01:51:57,652 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 688 transitions. Word has length 278 [2022-11-03 01:51:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:57,652 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 688 transitions. [2022-11-03 01:51:57,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 688 transitions. [2022-11-03 01:51:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:51:57,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:57,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:57,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:57,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:57,876 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1047343075, now seen corresponding path program 1 times [2022-11-03 01:51:57,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:57,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46507629] [2022-11-03 01:51:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:57,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:57,879 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:57,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 01:51:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:58,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:59,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:59,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46507629] [2022-11-03 01:51:59,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46507629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:59,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:59,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:59,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360078995] [2022-11-03 01:51:59,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:59,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:59,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:59,103 INFO L87 Difference]: Start difference. First operand 503 states and 688 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:01,054 INFO L93 Difference]: Finished difference Result 2388 states and 3403 transitions. [2022-11-03 01:52:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:01,057 INFO L225 Difference]: With dead ends: 2388 [2022-11-03 01:52:01,057 INFO L226 Difference]: Without dead ends: 1953 [2022-11-03 01:52:01,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:01,059 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 3980 mSDsluCounter, 4651 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3980 SdHoareTripleChecker+Valid, 5226 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:01,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3980 Valid, 5226 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-11-03 01:52:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 505. [2022-11-03 01:52:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.369047619047619) internal successors, (690), 504 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 690 transitions. [2022-11-03 01:52:01,072 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 690 transitions. Word has length 278 [2022-11-03 01:52:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:01,072 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 690 transitions. [2022-11-03 01:52:01,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 690 transitions. [2022-11-03 01:52:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:01,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:01,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:01,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:01,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:01,274 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:01,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1433205477, now seen corresponding path program 1 times [2022-11-03 01:52:01,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:01,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774902593] [2022-11-03 01:52:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:01,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:01,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:01,280 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:01,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 01:52:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:02,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:02,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774902593] [2022-11-03 01:52:02,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774902593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:02,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:02,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:02,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428035641] [2022-11-03 01:52:02,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:02,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:02,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:02,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:02,475 INFO L87 Difference]: Start difference. First operand 505 states and 690 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:04,448 INFO L93 Difference]: Finished difference Result 2398 states and 3414 transitions. [2022-11-03 01:52:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:04,450 INFO L225 Difference]: With dead ends: 2398 [2022-11-03 01:52:04,450 INFO L226 Difference]: Without dead ends: 1961 [2022-11-03 01:52:04,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:04,451 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 3983 mSDsluCounter, 4652 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3983 SdHoareTripleChecker+Valid, 5231 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:04,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3983 Valid, 5231 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-11-03 01:52:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 507. [2022-11-03 01:52:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.3675889328063242) internal successors, (692), 506 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 692 transitions. [2022-11-03 01:52:04,462 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 692 transitions. Word has length 278 [2022-11-03 01:52:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:04,462 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 692 transitions. [2022-11-03 01:52:04,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 692 transitions. [2022-11-03 01:52:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:04,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:04,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:04,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 01:52:04,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:04,668 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash -930636185, now seen corresponding path program 1 times [2022-11-03 01:52:04,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:04,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723507759] [2022-11-03 01:52:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:04,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:04,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:04,671 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:04,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 01:52:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:05,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:05,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:05,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:05,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723507759] [2022-11-03 01:52:05,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723507759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:05,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:05,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980583928] [2022-11-03 01:52:05,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:05,892 INFO L87 Difference]: Start difference. First operand 507 states and 692 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:07,840 INFO L93 Difference]: Finished difference Result 2408 states and 3425 transitions. [2022-11-03 01:52:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:07,841 INFO L225 Difference]: With dead ends: 2408 [2022-11-03 01:52:07,842 INFO L226 Difference]: Without dead ends: 1969 [2022-11-03 01:52:07,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:07,842 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 3986 mSDsluCounter, 4653 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3986 SdHoareTripleChecker+Valid, 5236 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:07,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3986 Valid, 5236 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-11-03 01:52:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 509. [2022-11-03 01:52:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3661417322834646) internal successors, (694), 508 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 694 transitions. [2022-11-03 01:52:07,854 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 694 transitions. Word has length 278 [2022-11-03 01:52:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:07,854 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 694 transitions. [2022-11-03 01:52:07,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 694 transitions. [2022-11-03 01:52:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:07,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:07,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:07,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:08,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:08,072 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash 966343273, now seen corresponding path program 1 times [2022-11-03 01:52:08,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:08,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320425451] [2022-11-03 01:52:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:08,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:08,076 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:08,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 01:52:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:09,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:09,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:09,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320425451] [2022-11-03 01:52:09,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320425451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:09,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:09,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557966569] [2022-11-03 01:52:09,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:09,306 INFO L87 Difference]: Start difference. First operand 509 states and 694 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:11,200 INFO L93 Difference]: Finished difference Result 2330 states and 3318 transitions. [2022-11-03 01:52:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:11,201 INFO L225 Difference]: With dead ends: 2330 [2022-11-03 01:52:11,201 INFO L226 Difference]: Without dead ends: 1889 [2022-11-03 01:52:11,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:11,202 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 3934 mSDsluCounter, 4594 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3934 SdHoareTripleChecker+Valid, 5187 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:11,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3934 Valid, 5187 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 01:52:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-11-03 01:52:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 513. [2022-11-03 01:52:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.365234375) internal successors, (699), 512 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 699 transitions. [2022-11-03 01:52:11,219 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 699 transitions. Word has length 278 [2022-11-03 01:52:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:11,220 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 699 transitions. [2022-11-03 01:52:11,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 699 transitions. [2022-11-03 01:52:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:11,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:11,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:11,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 01:52:11,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:11,428 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:11,428 INFO L85 PathProgramCache]: Analyzing trace with hash 810362731, now seen corresponding path program 1 times [2022-11-03 01:52:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:11,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376914464] [2022-11-03 01:52:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:11,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:11,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:11,431 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:11,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 01:52:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:12,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:12,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376914464] [2022-11-03 01:52:12,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376914464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:12,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:12,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633816567] [2022-11-03 01:52:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:12,635 INFO L87 Difference]: Start difference. First operand 513 states and 699 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:14,557 INFO L93 Difference]: Finished difference Result 2342 states and 3332 transitions. [2022-11-03 01:52:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:14,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:14,559 INFO L225 Difference]: With dead ends: 2342 [2022-11-03 01:52:14,559 INFO L226 Difference]: Without dead ends: 1897 [2022-11-03 01:52:14,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:14,560 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 3937 mSDsluCounter, 4595 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3937 SdHoareTripleChecker+Valid, 5192 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:14,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3937 Valid, 5192 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-11-03 01:52:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 515. [2022-11-03 01:52:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3638132295719845) internal successors, (701), 514 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 701 transitions. [2022-11-03 01:52:14,578 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 701 transitions. Word has length 278 [2022-11-03 01:52:14,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:14,579 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 701 transitions. [2022-11-03 01:52:14,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 701 transitions. [2022-11-03 01:52:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:14,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:14,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:14,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 01:52:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:14,804 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash -977507091, now seen corresponding path program 1 times [2022-11-03 01:52:14,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:14,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272234021] [2022-11-03 01:52:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:14,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:14,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:14,807 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:14,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 01:52:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:15,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:15,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:16,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:16,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272234021] [2022-11-03 01:52:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272234021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:16,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:16,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617163687] [2022-11-03 01:52:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:16,067 INFO L87 Difference]: Start difference. First operand 515 states and 701 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:18,002 INFO L93 Difference]: Finished difference Result 2352 states and 3343 transitions. [2022-11-03 01:52:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:18,004 INFO L225 Difference]: With dead ends: 2352 [2022-11-03 01:52:18,004 INFO L226 Difference]: Without dead ends: 1905 [2022-11-03 01:52:18,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:18,005 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 3940 mSDsluCounter, 4596 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3940 SdHoareTripleChecker+Valid, 5197 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:18,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3940 Valid, 5197 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-11-03 01:52:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 517. [2022-11-03 01:52:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.3624031007751938) internal successors, (703), 516 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 703 transitions. [2022-11-03 01:52:18,017 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 703 transitions. Word has length 278 [2022-11-03 01:52:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:18,017 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 703 transitions. [2022-11-03 01:52:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 703 transitions. [2022-11-03 01:52:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:18,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:18,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:18,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 01:52:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:18,220 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -907859217, now seen corresponding path program 1 times [2022-11-03 01:52:18,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:18,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719585672] [2022-11-03 01:52:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:18,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:18,223 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:18,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 01:52:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:19,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:19,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:19,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719585672] [2022-11-03 01:52:19,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719585672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:19,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:19,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983101106] [2022-11-03 01:52:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:19,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:19,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:19,478 INFO L87 Difference]: Start difference. First operand 517 states and 703 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:21,463 INFO L93 Difference]: Finished difference Result 2362 states and 3354 transitions. [2022-11-03 01:52:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:21,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:21,465 INFO L225 Difference]: With dead ends: 2362 [2022-11-03 01:52:21,465 INFO L226 Difference]: Without dead ends: 1913 [2022-11-03 01:52:21,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:21,465 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 3943 mSDsluCounter, 4597 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3943 SdHoareTripleChecker+Valid, 5202 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:21,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3943 Valid, 5202 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-11-03 01:52:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 519. [2022-11-03 01:52:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.361003861003861) internal successors, (705), 518 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 705 transitions. [2022-11-03 01:52:21,478 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 705 transitions. Word has length 278 [2022-11-03 01:52:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:21,478 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 705 transitions. [2022-11-03 01:52:21,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 705 transitions. [2022-11-03 01:52:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:21,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:21,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:21,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 01:52:21,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:21,684 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:21,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:21,684 INFO L85 PathProgramCache]: Analyzing trace with hash 491094385, now seen corresponding path program 1 times [2022-11-03 01:52:21,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:21,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575582701] [2022-11-03 01:52:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:21,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:21,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:21,687 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:21,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 01:52:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:22,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:22,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:22,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575582701] [2022-11-03 01:52:22,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575582701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:22,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:22,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432073424] [2022-11-03 01:52:22,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:22,942 INFO L87 Difference]: Start difference. First operand 519 states and 705 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:24,892 INFO L93 Difference]: Finished difference Result 2372 states and 3365 transitions. [2022-11-03 01:52:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:24,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:24,895 INFO L225 Difference]: With dead ends: 2372 [2022-11-03 01:52:24,895 INFO L226 Difference]: Without dead ends: 1921 [2022-11-03 01:52:24,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:24,896 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 3946 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3946 SdHoareTripleChecker+Valid, 5207 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:24,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3946 Valid, 5207 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-11-03 01:52:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 521. [2022-11-03 01:52:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.3596153846153847) internal successors, (707), 520 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 707 transitions. [2022-11-03 01:52:24,912 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 707 transitions. Word has length 278 [2022-11-03 01:52:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:24,912 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 707 transitions. [2022-11-03 01:52:24,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 707 transitions. [2022-11-03 01:52:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:24,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:24,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:24,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:25,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:25,114 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash 854560883, now seen corresponding path program 1 times [2022-11-03 01:52:25,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:25,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339093242] [2022-11-03 01:52:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:25,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:25,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:25,117 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:25,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 01:52:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:25,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:26,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:26,403 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:26,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339093242] [2022-11-03 01:52:26,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339093242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:26,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:26,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:26,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499777972] [2022-11-03 01:52:26,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:26,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:26,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:26,405 INFO L87 Difference]: Start difference. First operand 521 states and 707 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:28,369 INFO L93 Difference]: Finished difference Result 2382 states and 3376 transitions. [2022-11-03 01:52:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:28,371 INFO L225 Difference]: With dead ends: 2382 [2022-11-03 01:52:28,371 INFO L226 Difference]: Without dead ends: 1929 [2022-11-03 01:52:28,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:28,372 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 3949 mSDsluCounter, 4599 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3949 SdHoareTripleChecker+Valid, 5212 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:28,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3949 Valid, 5212 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-11-03 01:52:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 523. [2022-11-03 01:52:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.3582375478927202) internal successors, (709), 522 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 709 transitions. [2022-11-03 01:52:28,390 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 709 transitions. Word has length 278 [2022-11-03 01:52:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:28,390 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 709 transitions. [2022-11-03 01:52:28,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 709 transitions. [2022-11-03 01:52:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:28,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:28,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:28,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:28,608 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash 309688309, now seen corresponding path program 1 times [2022-11-03 01:52:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:28,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597569836] [2022-11-03 01:52:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:28,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:28,611 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:28,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 01:52:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:29,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:29,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:29,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:29,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:29,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597569836] [2022-11-03 01:52:29,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597569836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:29,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:29,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:29,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226741207] [2022-11-03 01:52:29,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:29,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:29,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:29,872 INFO L87 Difference]: Start difference. First operand 523 states and 709 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:31,845 INFO L93 Difference]: Finished difference Result 2400 states and 3399 transitions. [2022-11-03 01:52:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:31,848 INFO L225 Difference]: With dead ends: 2400 [2022-11-03 01:52:31,848 INFO L226 Difference]: Without dead ends: 1945 [2022-11-03 01:52:31,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:31,849 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 3959 mSDsluCounter, 4604 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3959 SdHoareTripleChecker+Valid, 5227 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:31,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3959 Valid, 5227 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-11-03 01:52:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 527. [2022-11-03 01:52:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3574144486692015) internal successors, (714), 526 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 714 transitions. [2022-11-03 01:52:31,869 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 714 transitions. Word has length 278 [2022-11-03 01:52:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:31,869 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 714 transitions. [2022-11-03 01:52:31,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 714 transitions. [2022-11-03 01:52:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:31,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:31,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:31,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:32,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:32,071 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash -124817289, now seen corresponding path program 1 times [2022-11-03 01:52:32,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:32,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274052613] [2022-11-03 01:52:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:32,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:32,074 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 01:52:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:32,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:33,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:33,345 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274052613] [2022-11-03 01:52:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274052613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:33,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:33,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103861664] [2022-11-03 01:52:33,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:33,346 INFO L87 Difference]: Start difference. First operand 527 states and 714 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:35,308 INFO L93 Difference]: Finished difference Result 2412 states and 3413 transitions. [2022-11-03 01:52:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:35,311 INFO L225 Difference]: With dead ends: 2412 [2022-11-03 01:52:35,311 INFO L226 Difference]: Without dead ends: 1953 [2022-11-03 01:52:35,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:35,312 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 3962 mSDsluCounter, 4605 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 5232 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:35,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3962 Valid, 5232 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-11-03 01:52:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 529. [2022-11-03 01:52:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.356060606060606) internal successors, (716), 528 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 716 transitions. [2022-11-03 01:52:35,332 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 716 transitions. Word has length 278 [2022-11-03 01:52:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:35,333 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 716 transitions. [2022-11-03 01:52:35,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 716 transitions. [2022-11-03 01:52:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:35,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:35,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:35,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 01:52:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:35,535 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash -831413895, now seen corresponding path program 1 times [2022-11-03 01:52:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:35,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449194408] [2022-11-03 01:52:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:35,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:35,538 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:35,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 01:52:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:36,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:36,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:36,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:36,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449194408] [2022-11-03 01:52:36,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449194408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:36,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:36,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169725335] [2022-11-03 01:52:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:36,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:36,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:36,812 INFO L87 Difference]: Start difference. First operand 529 states and 716 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:38,824 INFO L93 Difference]: Finished difference Result 2422 states and 3424 transitions. [2022-11-03 01:52:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:38,827 INFO L225 Difference]: With dead ends: 2422 [2022-11-03 01:52:38,827 INFO L226 Difference]: Without dead ends: 1961 [2022-11-03 01:52:38,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:38,828 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 3965 mSDsluCounter, 4606 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3965 SdHoareTripleChecker+Valid, 5237 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:38,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3965 Valid, 5237 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-11-03 01:52:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 531. [2022-11-03 01:52:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.3547169811320754) internal successors, (718), 530 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 718 transitions. [2022-11-03 01:52:38,847 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 718 transitions. Word has length 278 [2022-11-03 01:52:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:38,848 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 718 transitions. [2022-11-03 01:52:38,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 718 transitions. [2022-11-03 01:52:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:38,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:38,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:38,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 01:52:39,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:39,074 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash 30419707, now seen corresponding path program 1 times [2022-11-03 01:52:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928725105] [2022-11-03 01:52:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:39,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:39,077 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:39,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 01:52:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:39,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:40,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:40,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928725105] [2022-11-03 01:52:40,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928725105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:40,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:40,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362090543] [2022-11-03 01:52:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:40,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:40,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:40,362 INFO L87 Difference]: Start difference. First operand 531 states and 718 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:42,341 INFO L93 Difference]: Finished difference Result 2432 states and 3435 transitions. [2022-11-03 01:52:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:42,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:42,343 INFO L225 Difference]: With dead ends: 2432 [2022-11-03 01:52:42,343 INFO L226 Difference]: Without dead ends: 1969 [2022-11-03 01:52:42,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:42,344 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 3968 mSDsluCounter, 4607 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:42,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3968 Valid, 5242 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-11-03 01:52:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 533. [2022-11-03 01:52:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.3533834586466165) internal successors, (720), 532 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 720 transitions. [2022-11-03 01:52:42,356 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 720 transitions. Word has length 278 [2022-11-03 01:52:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:42,356 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 720 transitions. [2022-11-03 01:52:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 720 transitions. [2022-11-03 01:52:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:42,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:42,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:42,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 01:52:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:42,558 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 518466813, now seen corresponding path program 1 times [2022-11-03 01:52:42,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:42,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751869839] [2022-11-03 01:52:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:42,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:42,560 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:42,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 01:52:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:43,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:43,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:43,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751869839] [2022-11-03 01:52:43,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751869839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:43,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:43,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:43,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055537048] [2022-11-03 01:52:43,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:43,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:43,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:43,840 INFO L87 Difference]: Start difference. First operand 533 states and 720 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:45,830 INFO L93 Difference]: Finished difference Result 2442 states and 3446 transitions. [2022-11-03 01:52:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:45,832 INFO L225 Difference]: With dead ends: 2442 [2022-11-03 01:52:45,832 INFO L226 Difference]: Without dead ends: 1977 [2022-11-03 01:52:45,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:45,834 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 3971 mSDsluCounter, 4608 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3971 SdHoareTripleChecker+Valid, 5247 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:45,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3971 Valid, 5247 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-11-03 01:52:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 535. [2022-11-03 01:52:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.352059925093633) internal successors, (722), 534 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 722 transitions. [2022-11-03 01:52:45,854 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 722 transitions. Word has length 278 [2022-11-03 01:52:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:45,854 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 722 transitions. [2022-11-03 01:52:45,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 722 transitions. [2022-11-03 01:52:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:45,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:45,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:45,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:46,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:46,072 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash -763705473, now seen corresponding path program 1 times [2022-11-03 01:52:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:46,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746961871] [2022-11-03 01:52:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:46,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:46,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:46,075 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:46,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 01:52:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:46,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:46,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:47,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:47,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746961871] [2022-11-03 01:52:47,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746961871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:47,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:47,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:47,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274385426] [2022-11-03 01:52:47,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:47,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:47,364 INFO L87 Difference]: Start difference. First operand 535 states and 722 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:49,393 INFO L93 Difference]: Finished difference Result 2452 states and 3457 transitions. [2022-11-03 01:52:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:49,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:49,396 INFO L225 Difference]: With dead ends: 2452 [2022-11-03 01:52:49,396 INFO L226 Difference]: Without dead ends: 1985 [2022-11-03 01:52:49,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:49,397 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 3974 mSDsluCounter, 4609 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 5252 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:49,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3974 Valid, 5252 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1558 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-11-03 01:52:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 537. [2022-11-03 01:52:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.3507462686567164) internal successors, (724), 536 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 724 transitions. [2022-11-03 01:52:49,417 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 724 transitions. Word has length 278 [2022-11-03 01:52:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:49,417 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 724 transitions. [2022-11-03 01:52:49,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 724 transitions. [2022-11-03 01:52:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:49,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:49,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:49,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:49,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:49,632 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1809259137, now seen corresponding path program 1 times [2022-11-03 01:52:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:49,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156807657] [2022-11-03 01:52:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:49,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:49,635 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:49,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 01:52:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:50,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:50,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156807657] [2022-11-03 01:52:50,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156807657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:50,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:50,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:50,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756086942] [2022-11-03 01:52:50,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:50,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:50,950 INFO L87 Difference]: Start difference. First operand 537 states and 724 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:53,003 INFO L93 Difference]: Finished difference Result 2462 states and 3468 transitions. [2022-11-03 01:52:53,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:53,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:53,006 INFO L225 Difference]: With dead ends: 2462 [2022-11-03 01:52:53,006 INFO L226 Difference]: Without dead ends: 1993 [2022-11-03 01:52:53,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:53,007 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 3977 mSDsluCounter, 4610 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3977 SdHoareTripleChecker+Valid, 5257 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:53,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3977 Valid, 5257 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2022-11-03 01:52:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 539. [2022-11-03 01:52:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.3494423791821561) internal successors, (726), 538 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 726 transitions. [2022-11-03 01:52:53,026 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 726 transitions. Word has length 278 [2022-11-03 01:52:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:53,027 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 726 transitions. [2022-11-03 01:52:53,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 726 transitions. [2022-11-03 01:52:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:53,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:53,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:53,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 01:52:53,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:53,236 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -556775933, now seen corresponding path program 1 times [2022-11-03 01:52:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:53,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121913919] [2022-11-03 01:52:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:53,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:53,239 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:53,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 01:52:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:54,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:54,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:54,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121913919] [2022-11-03 01:52:54,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121913919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:54,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:54,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:54,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280006129] [2022-11-03 01:52:54,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:54,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:54,546 INFO L87 Difference]: Start difference. First operand 539 states and 726 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:56,554 INFO L93 Difference]: Finished difference Result 2472 states and 3479 transitions. [2022-11-03 01:52:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:52:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:56,557 INFO L225 Difference]: With dead ends: 2472 [2022-11-03 01:52:56,557 INFO L226 Difference]: Without dead ends: 2001 [2022-11-03 01:52:56,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:56,558 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 3980 mSDsluCounter, 4611 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3980 SdHoareTripleChecker+Valid, 5262 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:56,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3980 Valid, 5262 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:52:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-11-03 01:52:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 541. [2022-11-03 01:52:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.348148148148148) internal successors, (728), 540 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 728 transitions. [2022-11-03 01:52:56,571 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 728 transitions. Word has length 278 [2022-11-03 01:52:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:56,572 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 728 transitions. [2022-11-03 01:52:56,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 728 transitions. [2022-11-03 01:52:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:52:56,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:56,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:56,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 01:52:56,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:56,773 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:56,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1170369029, now seen corresponding path program 1 times [2022-11-03 01:52:56,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:56,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620954141] [2022-11-03 01:52:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:56,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:56,777 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:56,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 01:52:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:58,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:58,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620954141] [2022-11-03 01:52:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620954141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:58,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:58,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835223555] [2022-11-03 01:52:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:58,099 INFO L87 Difference]: Start difference. First operand 541 states and 728 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:00,080 INFO L93 Difference]: Finished difference Result 2394 states and 3372 transitions. [2022-11-03 01:53:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:00,082 INFO L225 Difference]: With dead ends: 2394 [2022-11-03 01:53:00,082 INFO L226 Difference]: Without dead ends: 1921 [2022-11-03 01:53:00,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:00,083 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 3928 mSDsluCounter, 4552 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3928 SdHoareTripleChecker+Valid, 5213 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:00,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3928 Valid, 5213 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-11-03 01:53:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 545. [2022-11-03 01:53:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.3474264705882353) internal successors, (733), 544 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 733 transitions. [2022-11-03 01:53:00,096 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 733 transitions. Word has length 278 [2022-11-03 01:53:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:00,096 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 733 transitions. [2022-11-03 01:53:00,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 733 transitions. [2022-11-03 01:53:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:00,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:00,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:00,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:00,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:00,298 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:00,298 INFO L85 PathProgramCache]: Analyzing trace with hash 131784455, now seen corresponding path program 1 times [2022-11-03 01:53:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:00,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945604778] [2022-11-03 01:53:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:00,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:00,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:00,300 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:00,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 01:53:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:01,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:01,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:01,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945604778] [2022-11-03 01:53:01,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945604778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:01,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:01,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967859295] [2022-11-03 01:53:01,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:01,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:01,628 INFO L87 Difference]: Start difference. First operand 545 states and 733 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:03,596 INFO L93 Difference]: Finished difference Result 2406 states and 3386 transitions. [2022-11-03 01:53:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:03,599 INFO L225 Difference]: With dead ends: 2406 [2022-11-03 01:53:03,599 INFO L226 Difference]: Without dead ends: 1929 [2022-11-03 01:53:03,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:03,601 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 3931 mSDsluCounter, 4553 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3931 SdHoareTripleChecker+Valid, 5218 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:03,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3931 Valid, 5218 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-11-03 01:53:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 547. [2022-11-03 01:53:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.3461538461538463) internal successors, (735), 546 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 735 transitions. [2022-11-03 01:53:03,620 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 735 transitions. Word has length 278 [2022-11-03 01:53:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:03,621 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 735 transitions. [2022-11-03 01:53:03,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 735 transitions. [2022-11-03 01:53:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:03,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:03,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:03,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:03,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:03,847 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2010076023, now seen corresponding path program 1 times [2022-11-03 01:53:03,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:03,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671702404] [2022-11-03 01:53:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:03,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:03,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:03,861 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:03,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 01:53:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:05,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:05,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:05,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671702404] [2022-11-03 01:53:05,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671702404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:05,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:05,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:05,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400098256] [2022-11-03 01:53:05,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:05,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:05,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:05,192 INFO L87 Difference]: Start difference. First operand 547 states and 735 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:07,154 INFO L93 Difference]: Finished difference Result 2416 states and 3397 transitions. [2022-11-03 01:53:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:07,157 INFO L225 Difference]: With dead ends: 2416 [2022-11-03 01:53:07,157 INFO L226 Difference]: Without dead ends: 1937 [2022-11-03 01:53:07,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:07,158 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 3934 mSDsluCounter, 4554 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3934 SdHoareTripleChecker+Valid, 5223 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:07,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3934 Valid, 5223 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-11-03 01:53:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 549. [2022-11-03 01:53:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.344890510948905) internal successors, (737), 548 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 737 transitions. [2022-11-03 01:53:07,171 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 737 transitions. Word has length 278 [2022-11-03 01:53:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:07,171 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 737 transitions. [2022-11-03 01:53:07,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 737 transitions. [2022-11-03 01:53:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:07,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:07,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:07,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:07,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:07,380 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1891634549, now seen corresponding path program 1 times [2022-11-03 01:53:07,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:07,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418907226] [2022-11-03 01:53:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:07,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:07,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:07,383 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:07,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 01:53:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:08,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:08,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:08,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418907226] [2022-11-03 01:53:08,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418907226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:08,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:08,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145229803] [2022-11-03 01:53:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:08,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:08,730 INFO L87 Difference]: Start difference. First operand 549 states and 737 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:10,708 INFO L93 Difference]: Finished difference Result 2426 states and 3408 transitions. [2022-11-03 01:53:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:10,710 INFO L225 Difference]: With dead ends: 2426 [2022-11-03 01:53:10,710 INFO L226 Difference]: Without dead ends: 1945 [2022-11-03 01:53:10,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:10,712 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 3937 mSDsluCounter, 4555 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3937 SdHoareTripleChecker+Valid, 5228 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:10,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3937 Valid, 5228 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-11-03 01:53:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 551. [2022-11-03 01:53:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.3436363636363637) internal successors, (739), 550 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 739 transitions. [2022-11-03 01:53:10,724 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 739 transitions. Word has length 278 [2022-11-03 01:53:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:10,724 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 739 transitions. [2022-11-03 01:53:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 739 transitions. [2022-11-03 01:53:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:10,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:10,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:10,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 01:53:10,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:10,926 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash 369938701, now seen corresponding path program 1 times [2022-11-03 01:53:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:10,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55722201] [2022-11-03 01:53:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:10,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:10,929 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:10,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 01:53:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:11,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:12,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:12,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:12,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55722201] [2022-11-03 01:53:12,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55722201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:12,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:12,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:12,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805395208] [2022-11-03 01:53:12,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:12,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:12,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:12,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:12,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:12,258 INFO L87 Difference]: Start difference. First operand 551 states and 739 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:14,281 INFO L93 Difference]: Finished difference Result 2436 states and 3419 transitions. [2022-11-03 01:53:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:14,284 INFO L225 Difference]: With dead ends: 2436 [2022-11-03 01:53:14,284 INFO L226 Difference]: Without dead ends: 1953 [2022-11-03 01:53:14,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:14,285 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 3940 mSDsluCounter, 4556 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3940 SdHoareTripleChecker+Valid, 5233 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:14,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3940 Valid, 5233 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-11-03 01:53:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 553. [2022-11-03 01:53:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.3423913043478262) internal successors, (741), 552 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 741 transitions. [2022-11-03 01:53:14,298 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 741 transitions. Word has length 278 [2022-11-03 01:53:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:14,298 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 741 transitions. [2022-11-03 01:53:14,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 741 transitions. [2022-11-03 01:53:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:14,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:14,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:14,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 01:53:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:14,499 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash -937203697, now seen corresponding path program 1 times [2022-11-03 01:53:14,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:14,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198139411] [2022-11-03 01:53:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:14,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:14,502 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:14,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 01:53:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:15,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:15,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:15,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:15,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198139411] [2022-11-03 01:53:15,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198139411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:15,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:15,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:15,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636193609] [2022-11-03 01:53:15,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:15,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:15,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:15,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:15,849 INFO L87 Difference]: Start difference. First operand 553 states and 741 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:17,858 INFO L93 Difference]: Finished difference Result 2446 states and 3430 transitions. [2022-11-03 01:53:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:17,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:17,860 INFO L225 Difference]: With dead ends: 2446 [2022-11-03 01:53:17,860 INFO L226 Difference]: Without dead ends: 1961 [2022-11-03 01:53:17,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:17,861 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 3943 mSDsluCounter, 4557 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3943 SdHoareTripleChecker+Valid, 5238 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:17,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3943 Valid, 5238 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-11-03 01:53:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 555. [2022-11-03 01:53:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.3411552346570397) internal successors, (743), 554 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 743 transitions. [2022-11-03 01:53:17,874 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 743 transitions. Word has length 278 [2022-11-03 01:53:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:17,875 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 743 transitions. [2022-11-03 01:53:17,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 743 transitions. [2022-11-03 01:53:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:17,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:17,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:17,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 01:53:18,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:18,077 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash 93837201, now seen corresponding path program 1 times [2022-11-03 01:53:18,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:18,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390713230] [2022-11-03 01:53:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:18,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:18,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:18,081 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 01:53:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:19,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:19,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:19,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390713230] [2022-11-03 01:53:19,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390713230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:19,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:19,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127601942] [2022-11-03 01:53:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:19,457 INFO L87 Difference]: Start difference. First operand 555 states and 743 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:21,450 INFO L93 Difference]: Finished difference Result 2464 states and 3453 transitions. [2022-11-03 01:53:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:21,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:21,453 INFO L225 Difference]: With dead ends: 2464 [2022-11-03 01:53:21,453 INFO L226 Difference]: Without dead ends: 1977 [2022-11-03 01:53:21,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:21,454 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 3953 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3953 SdHoareTripleChecker+Valid, 5253 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:21,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3953 Valid, 5253 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-11-03 01:53:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 559. [2022-11-03 01:53:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.3405017921146953) internal successors, (748), 558 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 748 transitions. [2022-11-03 01:53:21,466 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 748 transitions. Word has length 278 [2022-11-03 01:53:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:21,466 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 748 transitions. [2022-11-03 01:53:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 748 transitions. [2022-11-03 01:53:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:21,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:21,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:21,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 01:53:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:21,668 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1445222419, now seen corresponding path program 1 times [2022-11-03 01:53:21,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:21,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802841869] [2022-11-03 01:53:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:21,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:21,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:21,671 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:21,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 01:53:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:23,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:23,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802841869] [2022-11-03 01:53:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802841869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:23,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:23,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:23,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399464634] [2022-11-03 01:53:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:23,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:23,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:23,051 INFO L87 Difference]: Start difference. First operand 559 states and 748 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:25,091 INFO L93 Difference]: Finished difference Result 2476 states and 3467 transitions. [2022-11-03 01:53:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:25,094 INFO L225 Difference]: With dead ends: 2476 [2022-11-03 01:53:25,094 INFO L226 Difference]: Without dead ends: 1985 [2022-11-03 01:53:25,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:25,095 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 3956 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3956 SdHoareTripleChecker+Valid, 5258 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:25,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3956 Valid, 5258 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-11-03 01:53:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 561. [2022-11-03 01:53:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3392857142857142) internal successors, (750), 560 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 750 transitions. [2022-11-03 01:53:25,108 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 750 transitions. Word has length 278 [2022-11-03 01:53:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:25,108 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 750 transitions. [2022-11-03 01:53:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 750 transitions. [2022-11-03 01:53:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:25,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:25,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:25,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 01:53:25,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:25,310 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash 561713429, now seen corresponding path program 1 times [2022-11-03 01:53:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:25,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902602268] [2022-11-03 01:53:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:25,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:25,314 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 01:53:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:26,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:26,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:26,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:26,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:26,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902602268] [2022-11-03 01:53:26,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902602268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:26,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:26,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:26,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266119179] [2022-11-03 01:53:26,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:26,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:26,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:26,704 INFO L87 Difference]: Start difference. First operand 561 states and 750 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:28,716 INFO L93 Difference]: Finished difference Result 2486 states and 3478 transitions. [2022-11-03 01:53:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:28,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:28,718 INFO L225 Difference]: With dead ends: 2486 [2022-11-03 01:53:28,718 INFO L226 Difference]: Without dead ends: 1993 [2022-11-03 01:53:28,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:28,719 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 3959 mSDsluCounter, 4564 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3959 SdHoareTripleChecker+Valid, 5263 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:28,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3959 Valid, 5263 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2022-11-03 01:53:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 563. [2022-11-03 01:53:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.3380782918149465) internal successors, (752), 562 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 752 transitions. [2022-11-03 01:53:28,731 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 752 transitions. Word has length 278 [2022-11-03 01:53:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:28,732 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 752 transitions. [2022-11-03 01:53:28,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 752 transitions. [2022-11-03 01:53:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:28,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:28,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:28,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 01:53:28,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:28,933 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1378868585, now seen corresponding path program 1 times [2022-11-03 01:53:28,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:28,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237533995] [2022-11-03 01:53:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:28,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:28,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:28,936 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:28,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 01:53:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:29,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:29,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:30,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:30,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237533995] [2022-11-03 01:53:30,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237533995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:30,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:30,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:30,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771850199] [2022-11-03 01:53:30,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:30,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:30,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:30,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:30,307 INFO L87 Difference]: Start difference. First operand 563 states and 752 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:32,347 INFO L93 Difference]: Finished difference Result 2496 states and 3489 transitions. [2022-11-03 01:53:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:32,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:32,349 INFO L225 Difference]: With dead ends: 2496 [2022-11-03 01:53:32,349 INFO L226 Difference]: Without dead ends: 2001 [2022-11-03 01:53:32,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:32,351 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 3962 mSDsluCounter, 4565 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 5268 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:32,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3962 Valid, 5268 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-11-03 01:53:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 565. [2022-11-03 01:53:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.3368794326241136) internal successors, (754), 564 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 754 transitions. [2022-11-03 01:53:32,371 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 754 transitions. Word has length 278 [2022-11-03 01:53:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:32,371 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 754 transitions. [2022-11-03 01:53:32,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 754 transitions. [2022-11-03 01:53:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:32,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:32,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:32,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:32,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:32,573 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2145365145, now seen corresponding path program 1 times [2022-11-03 01:53:32,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:32,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559482849] [2022-11-03 01:53:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:32,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:32,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:32,576 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:32,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 01:53:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:33,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:33,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:33,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:33,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559482849] [2022-11-03 01:53:33,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559482849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:33,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:33,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945365715] [2022-11-03 01:53:33,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:33,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:33,979 INFO L87 Difference]: Start difference. First operand 565 states and 754 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:36,003 INFO L93 Difference]: Finished difference Result 2506 states and 3500 transitions. [2022-11-03 01:53:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:36,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:36,005 INFO L225 Difference]: With dead ends: 2506 [2022-11-03 01:53:36,005 INFO L226 Difference]: Without dead ends: 2009 [2022-11-03 01:53:36,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:36,006 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 3965 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3965 SdHoareTripleChecker+Valid, 5273 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:36,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3965 Valid, 5273 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:53:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2022-11-03 01:53:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 567. [2022-11-03 01:53:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3356890459363957) internal successors, (756), 566 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 756 transitions. [2022-11-03 01:53:36,019 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 756 transitions. Word has length 278 [2022-11-03 01:53:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:36,019 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 756 transitions. [2022-11-03 01:53:36,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 756 transitions. [2022-11-03 01:53:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:36,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:36,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:36,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 01:53:36,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:36,221 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1559088923, now seen corresponding path program 1 times [2022-11-03 01:53:36,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744281408] [2022-11-03 01:53:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:36,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:36,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:36,224 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:36,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 01:53:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:37,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:37,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:37,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744281408] [2022-11-03 01:53:37,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744281408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:37,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:37,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:37,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740871960] [2022-11-03 01:53:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:37,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:37,617 INFO L87 Difference]: Start difference. First operand 567 states and 756 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:39,646 INFO L93 Difference]: Finished difference Result 2516 states and 3511 transitions. [2022-11-03 01:53:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:39,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:39,648 INFO L225 Difference]: With dead ends: 2516 [2022-11-03 01:53:39,648 INFO L226 Difference]: Without dead ends: 2017 [2022-11-03 01:53:39,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:39,649 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 3968 mSDsluCounter, 4567 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 5278 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:39,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3968 Valid, 5278 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-11-03 01:53:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 569. [2022-11-03 01:53:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.3345070422535212) internal successors, (758), 568 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 758 transitions. [2022-11-03 01:53:39,663 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 758 transitions. Word has length 278 [2022-11-03 01:53:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:39,663 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 758 transitions. [2022-11-03 01:53:39,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 758 transitions. [2022-11-03 01:53:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:39,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:39,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:39,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-03 01:53:39,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:39,868 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash -859395555, now seen corresponding path program 1 times [2022-11-03 01:53:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:39,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361584428] [2022-11-03 01:53:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:39,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:39,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:39,871 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:39,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 01:53:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:40,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:40,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:41,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:41,257 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361584428] [2022-11-03 01:53:41,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361584428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:41,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:41,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041363215] [2022-11-03 01:53:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:41,259 INFO L87 Difference]: Start difference. First operand 569 states and 758 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:43,349 INFO L93 Difference]: Finished difference Result 2526 states and 3522 transitions. [2022-11-03 01:53:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:43,351 INFO L225 Difference]: With dead ends: 2526 [2022-11-03 01:53:43,351 INFO L226 Difference]: Without dead ends: 2025 [2022-11-03 01:53:43,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:43,352 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 3971 mSDsluCounter, 4568 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3971 SdHoareTripleChecker+Valid, 5283 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:43,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3971 Valid, 5283 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-11-03 01:53:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 571. [2022-11-03 01:53:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.3333333333333333) internal successors, (760), 570 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 760 transitions. [2022-11-03 01:53:43,368 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 760 transitions. Word has length 278 [2022-11-03 01:53:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:43,368 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 760 transitions. [2022-11-03 01:53:43,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 760 transitions. [2022-11-03 01:53:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:43,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:43,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:43,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 01:53:43,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:43,570 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:43,571 INFO L85 PathProgramCache]: Analyzing trace with hash 465460639, now seen corresponding path program 1 times [2022-11-03 01:53:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188155595] [2022-11-03 01:53:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:43,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:43,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:43,573 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:43,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 01:53:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:44,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:44,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:44,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188155595] [2022-11-03 01:53:44,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188155595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:44,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:44,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:44,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933327957] [2022-11-03 01:53:44,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:44,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:44,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:44,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:44,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:44,972 INFO L87 Difference]: Start difference. First operand 571 states and 760 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:47,020 INFO L93 Difference]: Finished difference Result 2536 states and 3533 transitions. [2022-11-03 01:53:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:47,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:47,022 INFO L225 Difference]: With dead ends: 2536 [2022-11-03 01:53:47,022 INFO L226 Difference]: Without dead ends: 2033 [2022-11-03 01:53:47,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:47,023 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 3974 mSDsluCounter, 4569 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 5288 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:47,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3974 Valid, 5288 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-11-03 01:53:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 573. [2022-11-03 01:53:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.332167832167832) internal successors, (762), 572 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 762 transitions. [2022-11-03 01:53:47,038 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 762 transitions. Word has length 278 [2022-11-03 01:53:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:47,039 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 762 transitions. [2022-11-03 01:53:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 762 transitions. [2022-11-03 01:53:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:47,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:47,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:47,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 01:53:47,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:47,241 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:47,241 INFO L85 PathProgramCache]: Analyzing trace with hash -592377439, now seen corresponding path program 1 times [2022-11-03 01:53:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:47,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705988561] [2022-11-03 01:53:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:47,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:47,243 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:47,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 01:53:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:48,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:53:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:48,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:48,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705988561] [2022-11-03 01:53:48,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705988561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:48,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:48,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:53:48,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617737282] [2022-11-03 01:53:48,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:48,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:48,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:48,661 INFO L87 Difference]: Start difference. First operand 573 states and 762 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:49,224 INFO L93 Difference]: Finished difference Result 2218 states and 2972 transitions. [2022-11-03 01:53:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:49,226 INFO L225 Difference]: With dead ends: 2218 [2022-11-03 01:53:49,226 INFO L226 Difference]: Without dead ends: 1713 [2022-11-03 01:53:49,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:53:49,226 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 1299 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:49,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 2004 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:53:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-03 01:53:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 707. [2022-11-03 01:53:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 1.2818696883852692) internal successors, (905), 706 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 905 transitions. [2022-11-03 01:53:49,248 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 905 transitions. Word has length 278 [2022-11-03 01:53:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:49,248 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 905 transitions. [2022-11-03 01:53:49,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 905 transitions. [2022-11-03 01:53:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:49,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:49,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:49,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 01:53:49,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:49,474 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:49,474 INFO L85 PathProgramCache]: Analyzing trace with hash -565311837, now seen corresponding path program 1 times [2022-11-03 01:53:49,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:49,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253246107] [2022-11-03 01:53:49,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:49,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:49,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:49,476 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:49,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 01:53:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:53:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:50,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:50,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:50,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253246107] [2022-11-03 01:53:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253246107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:50,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:50,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:53:50,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856798754] [2022-11-03 01:53:50,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:50,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:50,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:50,837 INFO L87 Difference]: Start difference. First operand 707 states and 905 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:51,385 INFO L93 Difference]: Finished difference Result 2218 states and 2971 transitions. [2022-11-03 01:53:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:51,388 INFO L225 Difference]: With dead ends: 2218 [2022-11-03 01:53:51,388 INFO L226 Difference]: Without dead ends: 1713 [2022-11-03 01:53:51,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:53:51,389 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 1292 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:51,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 2000 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:53:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-03 01:53:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 709. [2022-11-03 01:53:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.2810734463276836) internal successors, (907), 708 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 907 transitions. [2022-11-03 01:53:51,405 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 907 transitions. Word has length 278 [2022-11-03 01:53:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:51,405 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 907 transitions. [2022-11-03 01:53:51,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 907 transitions. [2022-11-03 01:53:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:51,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:51,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:51,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-03 01:53:51,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:51,607 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:51,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1168792613, now seen corresponding path program 1 times [2022-11-03 01:53:51,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:51,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582895909] [2022-11-03 01:53:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:51,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:51,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:51,610 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:51,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 01:53:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:53:52,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:52,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:52,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:52,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582895909] [2022-11-03 01:53:52,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582895909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:52,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:52,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:53:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79816391] [2022-11-03 01:53:52,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:52,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:52,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:52,960 INFO L87 Difference]: Start difference. First operand 709 states and 907 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:53,162 INFO L93 Difference]: Finished difference Result 2218 states and 2970 transitions. [2022-11-03 01:53:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:53,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:53,164 INFO L225 Difference]: With dead ends: 2218 [2022-11-03 01:53:53,164 INFO L226 Difference]: Without dead ends: 1713 [2022-11-03 01:53:53,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:53:53,165 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 1285 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 2228 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-03 01:53:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 711. [2022-11-03 01:53:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.2802816901408451) internal successors, (909), 710 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 909 transitions. [2022-11-03 01:53:53,186 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 909 transitions. Word has length 278 [2022-11-03 01:53:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:53,186 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 909 transitions. [2022-11-03 01:53:53,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 909 transitions. [2022-11-03 01:53:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:53,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:53,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:53,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 01:53:53,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:53,388 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash -742249945, now seen corresponding path program 1 times [2022-11-03 01:53:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830489903] [2022-11-03 01:53:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:53,391 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:53,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 01:53:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:54,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:54,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:54,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830489903] [2022-11-03 01:53:54,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830489903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:54,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:54,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:53:54,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498177430] [2022-11-03 01:53:54,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:54,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:53:54,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:53:54,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:53:54,789 INFO L87 Difference]: Start difference. First operand 711 states and 909 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:54,914 INFO L93 Difference]: Finished difference Result 1783 states and 2383 transitions. [2022-11-03 01:53:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:53:54,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:54,916 INFO L225 Difference]: With dead ends: 1783 [2022-11-03 01:53:54,916 INFO L226 Difference]: Without dead ends: 1278 [2022-11-03 01:53:54,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 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 01:53:54,917 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 591 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:54,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1480 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-11-03 01:53:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 713. [2022-11-03 01:53:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.279494382022472) internal successors, (911), 712 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 911 transitions. [2022-11-03 01:53:54,934 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 911 transitions. Word has length 278 [2022-11-03 01:53:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:54,934 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 911 transitions. [2022-11-03 01:53:54,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 911 transitions. [2022-11-03 01:53:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:54,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:54,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:54,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 01:53:55,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:55,136 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1709600599, now seen corresponding path program 1 times [2022-11-03 01:53:55,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:55,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690565249] [2022-11-03 01:53:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:55,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:55,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:55,138 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:55,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 01:53:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:55,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:56,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:56,592 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690565249] [2022-11-03 01:53:56,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690565249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:56,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:56,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:53:56,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42844085] [2022-11-03 01:53:56,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:56,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:56,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:56,593 INFO L87 Difference]: Start difference. First operand 713 states and 911 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:56,752 INFO L93 Difference]: Finished difference Result 2226 states and 2980 transitions. [2022-11-03 01:53:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:56,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:56,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:56,755 INFO L225 Difference]: With dead ends: 2226 [2022-11-03 01:53:56,755 INFO L226 Difference]: Without dead ends: 1721 [2022-11-03 01:53:56,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:53:56,756 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 1286 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:56,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 2263 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-03 01:53:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 715. [2022-11-03 01:53:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.2787114845938374) internal successors, (913), 714 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 913 transitions. [2022-11-03 01:53:56,768 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 913 transitions. Word has length 278 [2022-11-03 01:53:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:56,769 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 913 transitions. [2022-11-03 01:53:56,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 913 transitions. [2022-11-03 01:53:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:56,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:56,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:56,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-03 01:53:56,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:56,970 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:56,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2092740523, now seen corresponding path program 1 times [2022-11-03 01:53:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:56,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631368461] [2022-11-03 01:53:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:56,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:56,973 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:56,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 01:53:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:57,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:58,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:58,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:58,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631368461] [2022-11-03 01:53:58,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631368461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:58,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:58,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:53:58,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401976218] [2022-11-03 01:53:58,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:58,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:58,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:58,368 INFO L87 Difference]: Start difference. First operand 715 states and 913 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:58,538 INFO L93 Difference]: Finished difference Result 2226 states and 2979 transitions. [2022-11-03 01:53:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:58,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:53:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:58,540 INFO L225 Difference]: With dead ends: 2226 [2022-11-03 01:53:58,540 INFO L226 Difference]: Without dead ends: 1721 [2022-11-03 01:53:58,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:53:58,540 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 1279 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:58,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 2259 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-03 01:53:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 717. [2022-11-03 01:53:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.2779329608938548) internal successors, (915), 716 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 915 transitions. [2022-11-03 01:53:58,557 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 915 transitions. Word has length 278 [2022-11-03 01:53:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:58,557 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 915 transitions. [2022-11-03 01:53:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 915 transitions. [2022-11-03 01:53:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:53:58,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:58,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:58,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 01:53:58,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:58,759 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 876586797, now seen corresponding path program 1 times [2022-11-03 01:53:58,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:58,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115346418] [2022-11-03 01:53:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:58,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:58,762 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:58,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 01:53:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:00,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:00,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115346418] [2022-11-03 01:54:00,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115346418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:00,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:00,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135041630] [2022-11-03 01:54:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:00,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:00,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:00,149 INFO L87 Difference]: Start difference. First operand 717 states and 915 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:00,306 INFO L93 Difference]: Finished difference Result 2226 states and 2978 transitions. [2022-11-03 01:54:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:00,308 INFO L225 Difference]: With dead ends: 2226 [2022-11-03 01:54:00,308 INFO L226 Difference]: Without dead ends: 1721 [2022-11-03 01:54:00,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:00,309 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 1267 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:00,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 2252 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-03 01:54:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 721. [2022-11-03 01:54:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.2777777777777777) internal successors, (920), 720 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 920 transitions. [2022-11-03 01:54:00,326 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 920 transitions. Word has length 278 [2022-11-03 01:54:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:00,327 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 920 transitions. [2022-11-03 01:54:00,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 920 transitions. [2022-11-03 01:54:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:00,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:00,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:00,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 01:54:00,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:00,529 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:00,529 INFO L85 PathProgramCache]: Analyzing trace with hash 459190191, now seen corresponding path program 1 times [2022-11-03 01:54:00,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:00,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160324934] [2022-11-03 01:54:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:00,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:00,532 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:00,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 01:54:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:01,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:01,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:01,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:01,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160324934] [2022-11-03 01:54:01,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160324934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:01,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:01,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869566996] [2022-11-03 01:54:01,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:01,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:01,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:01,955 INFO L87 Difference]: Start difference. First operand 721 states and 920 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:02,135 INFO L93 Difference]: Finished difference Result 1794 states and 2390 transitions. [2022-11-03 01:54:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:02,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:02,137 INFO L225 Difference]: With dead ends: 1794 [2022-11-03 01:54:02,137 INFO L226 Difference]: Without dead ends: 1289 [2022-11-03 01:54:02,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:02,137 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 874 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:02,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 1943 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-03 01:54:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 725. [2022-11-03 01:54:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.2776243093922652) internal successors, (925), 724 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 925 transitions. [2022-11-03 01:54:02,154 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 925 transitions. Word has length 278 [2022-11-03 01:54:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:02,154 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 925 transitions. [2022-11-03 01:54:02,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 925 transitions. [2022-11-03 01:54:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:02,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:02,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:02,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 01:54:02,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:02,357 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1019889969, now seen corresponding path program 1 times [2022-11-03 01:54:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640498170] [2022-11-03 01:54:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:02,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:02,359 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:02,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 01:54:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:03,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:03,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640498170] [2022-11-03 01:54:03,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640498170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:03,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:03,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:54:03,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135389837] [2022-11-03 01:54:03,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:03,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:54:03,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:03,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:54:03,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:54:03,846 INFO L87 Difference]: Start difference. First operand 725 states and 925 transitions. Second operand has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:04,106 INFO L93 Difference]: Finished difference Result 2238 states and 2994 transitions. [2022-11-03 01:54:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:54:04,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:04,108 INFO L225 Difference]: With dead ends: 2238 [2022-11-03 01:54:04,108 INFO L226 Difference]: Without dead ends: 1733 [2022-11-03 01:54:04,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:54:04,110 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 1574 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:04,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 2694 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-03 01:54:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 727. [2022-11-03 01:54:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.2768595041322315) internal successors, (927), 726 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 927 transitions. [2022-11-03 01:54:04,126 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 927 transitions. Word has length 278 [2022-11-03 01:54:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:04,126 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 927 transitions. [2022-11-03 01:54:04,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 927 transitions. [2022-11-03 01:54:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:04,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:04,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:04,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 01:54:04,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:04,328 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2014160077, now seen corresponding path program 1 times [2022-11-03 01:54:04,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:04,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384689930] [2022-11-03 01:54:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:04,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:04,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:04,330 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:04,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 01:54:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:05,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:05,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:05,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:05,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384689930] [2022-11-03 01:54:05,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384689930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:05,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:05,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:05,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777827603] [2022-11-03 01:54:05,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:05,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:05,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:05,796 INFO L87 Difference]: Start difference. First operand 727 states and 927 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:05,980 INFO L93 Difference]: Finished difference Result 1794 states and 2388 transitions. [2022-11-03 01:54:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:05,982 INFO L225 Difference]: With dead ends: 1794 [2022-11-03 01:54:05,982 INFO L226 Difference]: Without dead ends: 1289 [2022-11-03 01:54:05,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:05,983 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 861 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:05,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 1933 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-03 01:54:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 729. [2022-11-03 01:54:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 1.276098901098901) internal successors, (929), 728 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 929 transitions. [2022-11-03 01:54:05,998 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 929 transitions. Word has length 278 [2022-11-03 01:54:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:05,998 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 929 transitions. [2022-11-03 01:54:05,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 929 transitions. [2022-11-03 01:54:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:05,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:05,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:06,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 01:54:06,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:06,200 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:06,200 INFO L85 PathProgramCache]: Analyzing trace with hash -627374667, now seen corresponding path program 1 times [2022-11-03 01:54:06,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:06,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172989164] [2022-11-03 01:54:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:06,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:06,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:06,203 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:06,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 01:54:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:06,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:54:06,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:07,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:07,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172989164] [2022-11-03 01:54:07,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172989164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:07,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:07,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274512047] [2022-11-03 01:54:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:07,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:07,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:07,315 INFO L87 Difference]: Start difference. First operand 729 states and 929 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:07,910 INFO L93 Difference]: Finished difference Result 1794 states and 2387 transitions. [2022-11-03 01:54:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:07,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:07,911 INFO L225 Difference]: With dead ends: 1794 [2022-11-03 01:54:07,911 INFO L226 Difference]: Without dead ends: 1289 [2022-11-03 01:54:07,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:07,916 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 854 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:07,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 1713 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:54:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-03 01:54:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 731. [2022-11-03 01:54:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.2753424657534247) internal successors, (931), 730 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 931 transitions. [2022-11-03 01:54:07,940 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 931 transitions. Word has length 278 [2022-11-03 01:54:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:07,940 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 931 transitions. [2022-11-03 01:54:07,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 931 transitions. [2022-11-03 01:54:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:07,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:07,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:07,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:08,169 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -183473993, now seen corresponding path program 1 times [2022-11-03 01:54:08,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:08,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501141247] [2022-11-03 01:54:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:08,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:08,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:08,171 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:08,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 01:54:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:08,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:09,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:09,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501141247] [2022-11-03 01:54:09,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501141247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:09,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:09,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:09,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778446527] [2022-11-03 01:54:09,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:09,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:09,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:09,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:09,235 INFO L87 Difference]: Start difference. First operand 731 states and 931 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:09,434 INFO L93 Difference]: Finished difference Result 1794 states and 2386 transitions. [2022-11-03 01:54:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:09,435 INFO L225 Difference]: With dead ends: 1794 [2022-11-03 01:54:09,436 INFO L226 Difference]: Without dead ends: 1289 [2022-11-03 01:54:09,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:09,436 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 847 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:09,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1908 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-03 01:54:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 733. [2022-11-03 01:54:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 1.2745901639344261) internal successors, (933), 732 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 933 transitions. [2022-11-03 01:54:09,449 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 933 transitions. Word has length 278 [2022-11-03 01:54:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:09,450 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 933 transitions. [2022-11-03 01:54:09,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 933 transitions. [2022-11-03 01:54:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:09,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:09,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:09,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 01:54:09,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:09,656 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2082907193, now seen corresponding path program 1 times [2022-11-03 01:54:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:09,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927700018] [2022-11-03 01:54:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:09,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:09,660 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:09,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 01:54:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:10,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:10,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:11,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:11,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:11,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927700018] [2022-11-03 01:54:11,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927700018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:11,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:11,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:11,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36501369] [2022-11-03 01:54:11,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:11,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:11,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:11,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:11,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:11,111 INFO L87 Difference]: Start difference. First operand 733 states and 933 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:11,579 INFO L93 Difference]: Finished difference Result 1783 states and 2374 transitions. [2022-11-03 01:54:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:11,581 INFO L225 Difference]: With dead ends: 1783 [2022-11-03 01:54:11,581 INFO L226 Difference]: Without dead ends: 1278 [2022-11-03 01:54:11,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 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 01:54:11,582 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 517 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:11,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1273 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:54:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-11-03 01:54:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 739. [2022-11-03 01:54:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 1.2750677506775068) internal successors, (941), 738 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 941 transitions. [2022-11-03 01:54:11,598 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 941 transitions. Word has length 278 [2022-11-03 01:54:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:11,598 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 941 transitions. [2022-11-03 01:54:11,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 941 transitions. [2022-11-03 01:54:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:11,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:11,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:11,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 01:54:11,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:11,799 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1318573765, now seen corresponding path program 1 times [2022-11-03 01:54:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:11,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223223664] [2022-11-03 01:54:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:11,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:11,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:11,802 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:11,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 01:54:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:12,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:13,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:13,248 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:13,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223223664] [2022-11-03 01:54:13,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223223664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:13,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:13,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:13,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987480567] [2022-11-03 01:54:13,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:13,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:13,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:13,250 INFO L87 Difference]: Start difference. First operand 739 states and 941 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:13,809 INFO L93 Difference]: Finished difference Result 2252 states and 3010 transitions. [2022-11-03 01:54:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:13,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:13,811 INFO L225 Difference]: With dead ends: 2252 [2022-11-03 01:54:13,811 INFO L226 Difference]: Without dead ends: 1747 [2022-11-03 01:54:13,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:13,812 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 1251 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:13,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1988 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:54:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-11-03 01:54:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 741. [2022-11-03 01:54:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.2743243243243243) internal successors, (943), 740 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 943 transitions. [2022-11-03 01:54:13,835 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 943 transitions. Word has length 278 [2022-11-03 01:54:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:13,835 INFO L495 AbstractCegarLoop]: Abstraction has 741 states and 943 transitions. [2022-11-03 01:54:13,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 943 transitions. [2022-11-03 01:54:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:13,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:13,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:13,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-03 01:54:14,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:14,037 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:14,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2079000253, now seen corresponding path program 1 times [2022-11-03 01:54:14,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:14,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755021885] [2022-11-03 01:54:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:14,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:14,040 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:14,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 01:54:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:15,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:15,546 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:15,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755021885] [2022-11-03 01:54:15,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755021885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:15,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:15,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168402336] [2022-11-03 01:54:15,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:15,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:15,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:15,549 INFO L87 Difference]: Start difference. First operand 741 states and 943 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:16,105 INFO L93 Difference]: Finished difference Result 2252 states and 3009 transitions. [2022-11-03 01:54:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:16,107 INFO L225 Difference]: With dead ends: 2252 [2022-11-03 01:54:16,107 INFO L226 Difference]: Without dead ends: 1747 [2022-11-03 01:54:16,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:16,108 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 1244 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:16,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 1984 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:54:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-11-03 01:54:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 743. [2022-11-03 01:54:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.2735849056603774) internal successors, (945), 742 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 945 transitions. [2022-11-03 01:54:16,123 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 945 transitions. Word has length 278 [2022-11-03 01:54:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:16,123 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 945 transitions. [2022-11-03 01:54:16,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 945 transitions. [2022-11-03 01:54:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:16,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:16,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:16,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:16,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:16,328 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1792320321, now seen corresponding path program 1 times [2022-11-03 01:54:16,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:16,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855688444] [2022-11-03 01:54:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:16,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:16,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:16,331 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:16,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 01:54:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:17,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:17,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:17,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:17,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855688444] [2022-11-03 01:54:17,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855688444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:17,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:17,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910196290] [2022-11-03 01:54:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:17,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:17,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:17,781 INFO L87 Difference]: Start difference. First operand 743 states and 945 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:17,989 INFO L93 Difference]: Finished difference Result 2252 states and 3008 transitions. [2022-11-03 01:54:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:17,991 INFO L225 Difference]: With dead ends: 2252 [2022-11-03 01:54:17,991 INFO L226 Difference]: Without dead ends: 1747 [2022-11-03 01:54:17,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:17,992 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1237 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:17,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 2213 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-11-03 01:54:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 745. [2022-11-03 01:54:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.2728494623655915) internal successors, (947), 744 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 947 transitions. [2022-11-03 01:54:18,012 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 947 transitions. Word has length 278 [2022-11-03 01:54:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:18,012 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 947 transitions. [2022-11-03 01:54:18,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 947 transitions. [2022-11-03 01:54:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:18,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:18,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:18,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 01:54:18,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:18,214 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash 657279809, now seen corresponding path program 1 times [2022-11-03 01:54:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:18,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10388168] [2022-11-03 01:54:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:18,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:18,217 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:18,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 01:54:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:19,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:19,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:19,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10388168] [2022-11-03 01:54:19,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10388168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:19,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:19,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:54:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491010676] [2022-11-03 01:54:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:19,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:54:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:54:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:54:19,661 INFO L87 Difference]: Start difference. First operand 745 states and 947 transitions. Second operand has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:19,877 INFO L93 Difference]: Finished difference Result 2242 states and 2992 transitions. [2022-11-03 01:54:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:54:19,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:19,879 INFO L225 Difference]: With dead ends: 2242 [2022-11-03 01:54:19,879 INFO L226 Difference]: Without dead ends: 1737 [2022-11-03 01:54:19,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:54:19,880 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 1510 mSDsluCounter, 2014 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 2656 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:19,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1510 Valid, 2656 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-11-03 01:54:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 747. [2022-11-03 01:54:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.272117962466488) internal successors, (949), 746 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 949 transitions. [2022-11-03 01:54:19,895 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 949 transitions. Word has length 278 [2022-11-03 01:54:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:19,895 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 949 transitions. [2022-11-03 01:54:19,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.333333333333336) internal successors, (278), 6 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 949 transitions. [2022-11-03 01:54:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:19,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:19,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:19,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 01:54:20,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:20,097 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1316811331, now seen corresponding path program 1 times [2022-11-03 01:54:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:20,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827259505] [2022-11-03 01:54:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:20,099 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:20,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 01:54:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:54:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:21,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:21,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:21,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827259505] [2022-11-03 01:54:21,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827259505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:21,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:21,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785088275] [2022-11-03 01:54:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:21,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:21,217 INFO L87 Difference]: Start difference. First operand 747 states and 949 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:21,793 INFO L93 Difference]: Finished difference Result 1794 states and 2380 transitions. [2022-11-03 01:54:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:21,795 INFO L225 Difference]: With dead ends: 1794 [2022-11-03 01:54:21,795 INFO L226 Difference]: Without dead ends: 1289 [2022-11-03 01:54:21,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:21,795 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 795 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:21,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1679 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:54:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-03 01:54:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 749. [2022-11-03 01:54:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.2713903743315509) internal successors, (951), 748 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 951 transitions. [2022-11-03 01:54:21,810 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 951 transitions. Word has length 278 [2022-11-03 01:54:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:21,810 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 951 transitions. [2022-11-03 01:54:21,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 951 transitions. [2022-11-03 01:54:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:21,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:21,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:21,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 01:54:22,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:22,011 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash 472805829, now seen corresponding path program 1 times [2022-11-03 01:54:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583197712] [2022-11-03 01:54:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:22,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:22,014 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:22,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 01:54:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:23,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:23,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583197712] [2022-11-03 01:54:23,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583197712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:23,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:23,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:23,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384218762] [2022-11-03 01:54:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:23,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:23,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:23,516 INFO L87 Difference]: Start difference. First operand 749 states and 951 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:23,759 INFO L93 Difference]: Finished difference Result 2260 states and 3017 transitions. [2022-11-03 01:54:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:23,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:23,761 INFO L225 Difference]: With dead ends: 2260 [2022-11-03 01:54:23,761 INFO L226 Difference]: Without dead ends: 1755 [2022-11-03 01:54:23,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:23,762 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 1222 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:23,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 2202 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2022-11-03 01:54:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 755. [2022-11-03 01:54:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 1.2718832891246685) internal successors, (959), 754 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 959 transitions. [2022-11-03 01:54:23,779 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 959 transitions. Word has length 278 [2022-11-03 01:54:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:23,779 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 959 transitions. [2022-11-03 01:54:23,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 959 transitions. [2022-11-03 01:54:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:23,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:23,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:23,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 01:54:23,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:23,981 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1859009223, now seen corresponding path program 1 times [2022-11-03 01:54:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:23,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462957158] [2022-11-03 01:54:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:23,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:23,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:23,983 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:23,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 01:54:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:25,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:25,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:25,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462957158] [2022-11-03 01:54:25,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462957158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:25,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:25,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294954751] [2022-11-03 01:54:25,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:25,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:25,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:25,503 INFO L87 Difference]: Start difference. First operand 755 states and 959 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:25,715 INFO L93 Difference]: Finished difference Result 2272 states and 3034 transitions. [2022-11-03 01:54:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:25,717 INFO L225 Difference]: With dead ends: 2272 [2022-11-03 01:54:25,718 INFO L226 Difference]: Without dead ends: 1767 [2022-11-03 01:54:25,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:25,718 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 1221 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:25,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1221 Valid, 2209 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2022-11-03 01:54:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 763. [2022-11-03 01:54:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.272965879265092) internal successors, (970), 762 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 970 transitions. [2022-11-03 01:54:25,734 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 970 transitions. Word has length 278 [2022-11-03 01:54:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:25,734 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 970 transitions. [2022-11-03 01:54:25,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 970 transitions. [2022-11-03 01:54:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:25,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:25,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:25,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-03 01:54:25,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:25,936 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2013256247, now seen corresponding path program 1 times [2022-11-03 01:54:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:25,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418213215] [2022-11-03 01:54:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:25,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:25,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:25,938 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:25,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 01:54:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:26,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:54:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:27,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:27,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418213215] [2022-11-03 01:54:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418213215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:27,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:27,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757083749] [2022-11-03 01:54:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:27,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:27,002 INFO L87 Difference]: Start difference. First operand 763 states and 970 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:27,065 INFO L93 Difference]: Finished difference Result 1783 states and 2366 transitions. [2022-11-03 01:54:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:27,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:27,066 INFO L225 Difference]: With dead ends: 1783 [2022-11-03 01:54:27,066 INFO L226 Difference]: Without dead ends: 1278 [2022-11-03 01:54:27,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 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 01:54:27,067 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 439 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:27,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1466 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:54:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-11-03 01:54:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 767. [2022-11-03 01:54:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 1.272845953002611) internal successors, (975), 766 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 975 transitions. [2022-11-03 01:54:27,083 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 975 transitions. Word has length 278 [2022-11-03 01:54:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:27,083 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 975 transitions. [2022-11-03 01:54:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 975 transitions. [2022-11-03 01:54:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:27,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:27,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:27,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:27,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:27,287 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:27,287 INFO L85 PathProgramCache]: Analyzing trace with hash 693363147, now seen corresponding path program 1 times [2022-11-03 01:54:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:27,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944302754] [2022-11-03 01:54:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:27,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:27,289 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:27,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 01:54:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:28,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:28,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:28,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:28,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944302754] [2022-11-03 01:54:28,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944302754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:28,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:28,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890744917] [2022-11-03 01:54:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:28,839 INFO L87 Difference]: Start difference. First operand 767 states and 975 transitions. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:29,065 INFO L93 Difference]: Finished difference Result 2280 states and 3044 transitions. [2022-11-03 01:54:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:29,067 INFO L225 Difference]: With dead ends: 2280 [2022-11-03 01:54:29,068 INFO L226 Difference]: Without dead ends: 1775 [2022-11-03 01:54:29,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 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 01:54:29,069 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 1210 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:29,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 2205 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-11-03 01:54:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 771. [2022-11-03 01:54:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.2727272727272727) internal successors, (980), 770 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 980 transitions. [2022-11-03 01:54:29,095 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 980 transitions. Word has length 278 [2022-11-03 01:54:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:29,096 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 980 transitions. [2022-11-03 01:54:29,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 980 transitions. [2022-11-03 01:54:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:29,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:29,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:29,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:29,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:29,304 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash 106557133, now seen corresponding path program 1 times [2022-11-03 01:54:29,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:29,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995390744] [2022-11-03 01:54:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:29,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:29,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:29,306 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:29,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-03 01:54:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:30,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:30,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:30,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995390744] [2022-11-03 01:54:30,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995390744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:30,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:30,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63706930] [2022-11-03 01:54:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:30,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:30,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:30,844 INFO L87 Difference]: Start difference. First operand 771 states and 980 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:31,017 INFO L93 Difference]: Finished difference Result 1783 states and 2364 transitions. [2022-11-03 01:54:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 278 [2022-11-03 01:54:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:31,019 INFO L225 Difference]: With dead ends: 1783 [2022-11-03 01:54:31,019 INFO L226 Difference]: Without dead ends: 1278 [2022-11-03 01:54:31,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 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 01:54:31,020 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 422 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:31,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1431 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-11-03 01:54:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 773. [2022-11-03 01:54:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.2720207253886011) internal successors, (982), 772 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 982 transitions. [2022-11-03 01:54:31,035 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 982 transitions. Word has length 278 [2022-11-03 01:54:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:31,035 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 982 transitions. [2022-11-03 01:54:31,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 982 transitions. [2022-11-03 01:54:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 01:54:31,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:31,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:31,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-03 01:54:31,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:31,237 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:31,237 INFO L85 PathProgramCache]: Analyzing trace with hash 807621711, now seen corresponding path program 1 times [2022-11-03 01:54:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:31,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734526858] [2022-11-03 01:54:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:31,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:31,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:31,239 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:31,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab545cee-78e0-47d3-86f4-6da96e7bc393/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 01:54:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 161 conjunts are in the unsatisfiable core [2022-11-03 01:54:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates...