./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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 33bfd955bc64a66d8dbe5590b4a6476efcc4a3015059ca9bfec2b3731c08a02e --- 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 01:57:11,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:57:11,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:57:11,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:57:11,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:57:11,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:57:11,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:57:11,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:57:11,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:57:11,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:57:11,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:57:11,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:57:11,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:57:11,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:57:11,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:57:11,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:57:11,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:57:11,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:57:11,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:57:11,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:57:11,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:57:11,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:57:11,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:57:11,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:57:11,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:57:11,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:57:11,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:57:11,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:57:11,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:57:11,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:57:11,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:57:11,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:57:11,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:57:11,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:57:11,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:57:11,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:57:11,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:57:11,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:57:11,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:57:11,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:57:11,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:57:11,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:57:11,546 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:57:11,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:57:11,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:57:11,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:57:11,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:57:11,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:57:11,548 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:57:11,548 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:57:11,548 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:57:11,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:57:11,548 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:57:11,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:57:11,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:57:11,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:57:11,549 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:57:11,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:57:11,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:57:11,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:57:11,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:57:11,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:57:11,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:57:11,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:57:11,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:57:11,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:57:11,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:57:11,552 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:57:11,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:57:11,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:57:11,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:57:11,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:11,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:57:11,554 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:57:11,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:57:11,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:57:11,554 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:57:11,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:57:11,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:57:11,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:57:11,555 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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33bfd955bc64a66d8dbe5590b4a6476efcc4a3015059ca9bfec2b3731c08a02e [2022-11-03 01:57:11,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:57:11,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:57:11,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:57:11,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:57:11,947 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:57:11,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c [2022-11-03 01:57:12,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/1f1c1a698/c1c1c35474e24098953eaeed2edf34ae/FLAG57567568d [2022-11-03 01:57:12,906 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:57:12,907 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c [2022-11-03 01:57:12,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/1f1c1a698/c1c1c35474e24098953eaeed2edf34ae/FLAG57567568d [2022-11-03 01:57:13,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/1f1c1a698/c1c1c35474e24098953eaeed2edf34ae [2022-11-03 01:57:13,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:57:13,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:57:13,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:13,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:57:13,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:57:13,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eee57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13, skipping insertion in model container [2022-11-03 01:57:13,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:57:13,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:57:13,418 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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c[1014,1027] [2022-11-03 01:57:14,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:14,064 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:57:14,079 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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c[1014,1027] [2022-11-03 01:57:14,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:14,323 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:57:14,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14 WrapperNode [2022-11-03 01:57:14,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:14,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:14,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:57:14,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:57:14,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:14,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:14,710 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2442 [2022-11-03 01:57:14,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:14,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:57:14,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:57:14,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:57:14,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:14,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:14,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:14,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:15,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:15,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:15,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:15,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:15,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:57:15,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:57:15,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:57:15,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:57:15,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (1/1) ... [2022-11-03 01:57:15,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:15,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:15,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:57:15,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:57:15,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:57:15,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:57:16,171 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:57:16,174 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:58:16,700 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:59:02,189 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:59:02,190 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:59:02,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:02 BoogieIcfgContainer [2022-11-03 01:59:02,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:59:02,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:59:02,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:59:02,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:59:02,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:57:13" (1/3) ... [2022-11-03 01:59:02,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4556c911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:02, skipping insertion in model container [2022-11-03 01:59:02,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:14" (2/3) ... [2022-11-03 01:59:02,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4556c911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:02, skipping insertion in model container [2022-11-03 01:59:02,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:02" (3/3) ... [2022-11-03 01:59:02,202 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.7.prop1-func-interl.c [2022-11-03 01:59:02,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:59:02,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:59:02,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:59:02,283 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;@317d5ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:59:02,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:59:02,287 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 01:59:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:59:02,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:02,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:59:02,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash 17512656, now seen corresponding path program 1 times [2022-11-03 01:59:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:02,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813199758] [2022-11-03 01:59:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:02,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:59:03,037 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:59:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:59:03,351 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:59:03,353 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:59:03,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:59:03,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:59:03,362 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:59:03,367 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:59:03,395 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:59:03,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:59:03 BoogieIcfgContainer [2022-11-03 01:59:03,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:59:03,409 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:59:03,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:59:03,410 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:59:03,410 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:02" (3/4) ... [2022-11-03 01:59:03,414 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:59:03,414 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:59:03,416 INFO L158 Benchmark]: Toolchain (without parser) took 110376.90ms. Allocated memory was 98.6MB in the beginning and 6.0GB in the end (delta: 5.9GB). Free memory was 57.5MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-03 01:59:03,416 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 98.6MB. Free memory was 77.7MB in the beginning and 77.6MB in the end (delta: 91.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:59:03,417 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1283.82ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 57.4MB in the beginning and 80.4MB in the end (delta: -23.1MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. [2022-11-03 01:59:03,418 INFO L158 Benchmark]: Boogie Procedure Inliner took 385.67ms. Allocated memory is still 121.6MB. Free memory was 80.4MB in the beginning and 46.8MB in the end (delta: 33.6MB). Peak memory consumption was 50.0MB. Max. memory is 16.1GB. [2022-11-03 01:59:03,418 INFO L158 Benchmark]: Boogie Preprocessor took 555.28ms. Allocated memory is still 121.6MB. Free memory was 46.8MB in the beginning and 39.3MB in the end (delta: 7.6MB). Peak memory consumption was 30.7MB. Max. memory is 16.1GB. [2022-11-03 01:59:03,419 INFO L158 Benchmark]: RCFGBuilder took 106925.04ms. Allocated memory was 121.6MB in the beginning and 6.0GB in the end (delta: 5.9GB). Free memory was 39.3MB in the beginning and 4.7GB in the end (delta: -4.7GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2022-11-03 01:59:03,420 INFO L158 Benchmark]: TraceAbstraction took 1213.93ms. Allocated memory is still 6.0GB. Free memory was 4.7GB in the beginning and 4.6GB in the end (delta: 112.1MB). Peak memory consumption was 111.1MB. Max. memory is 16.1GB. [2022-11-03 01:59:03,421 INFO L158 Benchmark]: Witness Printer took 5.13ms. Allocated memory is still 6.0GB. Free memory was 4.6GB in the beginning and 4.6GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:59:03,424 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 98.6MB. Free memory was 77.7MB in the beginning and 77.6MB in the end (delta: 91.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1283.82ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 57.4MB in the beginning and 80.4MB in the end (delta: -23.1MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 385.67ms. Allocated memory is still 121.6MB. Free memory was 80.4MB in the beginning and 46.8MB in the end (delta: 33.6MB). Peak memory consumption was 50.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 555.28ms. Allocated memory is still 121.6MB. Free memory was 46.8MB in the beginning and 39.3MB in the end (delta: 7.6MB). Peak memory consumption was 30.7MB. Max. memory is 16.1GB. * RCFGBuilder took 106925.04ms. Allocated memory was 121.6MB in the beginning and 6.0GB in the end (delta: 5.9GB). Free memory was 39.3MB in the beginning and 4.7GB in the end (delta: -4.7GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. * TraceAbstraction took 1213.93ms. Allocated memory is still 6.0GB. Free memory was 4.7GB in the beginning and 4.6GB in the end (delta: 112.1MB). Peak memory consumption was 111.1MB. Max. memory is 16.1GB. * Witness Printer took 5.13ms. Allocated memory is still 6.0GB. Free memory was 4.6GB in the beginning and 4.6GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. 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 285, overapproximation of bitwiseAnd at line 199. 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_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_38 = 0; [L39] const SORT_4 var_81 = 1; [L40] const SORT_4 var_82 = 0; [L41] const SORT_2 var_94 = 0; [L42] const SORT_2 var_96 = 1; [L43] const SORT_3 var_116 = 0; [L44] const SORT_2 var_158 = 2; [L45] const SORT_4 var_306 = 4; [L46] const SORT_2 var_318 = 4; [L47] const SORT_4 var_320 = 12; [L48] const SORT_4 var_425 = 2; [L49] const SORT_4 var_469 = 3; [L51] SORT_1 input_93; [L52] SORT_1 input_95; [L53] SORT_1 input_100; [L54] SORT_1 input_101; [L55] SORT_1 input_105; [L56] SORT_1 input_106; [L57] SORT_1 input_110; [L58] SORT_1 input_111; [L59] SORT_1 input_115; [L60] SORT_1 input_123; [L61] SORT_1 input_130; [L62] SORT_1 input_137; [L63] SORT_1 input_144; [L64] SORT_1 input_148; [L65] SORT_1 input_149; [L66] SORT_1 input_166; [L67] SORT_1 input_170; [L68] SORT_1 input_171; [L69] SORT_1 input_187; [L70] SORT_1 input_191; [L71] SORT_1 input_192; [L72] SORT_1 input_208; [L73] SORT_1 input_212; [L74] SORT_1 input_213; [L75] SORT_1 input_236; [L76] SORT_1 input_239; [L77] SORT_1 input_255; [L78] SORT_1 input_258; [L79] SORT_1 input_274; [L80] SORT_1 input_277; [L81] SORT_1 input_293; [L82] SORT_1 input_296; [L84] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L85] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L86] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L87] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L88] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L89] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L90] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L91] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L92] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L93] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L94] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L95] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L96] SORT_2 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L97] SORT_2 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L98] SORT_2 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L99] SORT_2 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L100] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_2 init_7_arg_1 = var_5; [L123] state_6 = init_7_arg_1 [L124] SORT_2 init_9_arg_1 = var_5; [L125] state_8 = init_9_arg_1 [L126] SORT_2 init_11_arg_1 = var_5; [L127] state_10 = init_11_arg_1 [L128] SORT_2 init_13_arg_1 = var_5; [L129] state_12 = init_13_arg_1 [L130] SORT_2 init_15_arg_1 = var_5; [L131] state_14 = init_15_arg_1 [L132] SORT_2 init_17_arg_1 = var_5; [L133] state_16 = init_17_arg_1 [L134] SORT_2 init_19_arg_1 = var_5; [L135] state_18 = init_19_arg_1 [L136] SORT_2 init_21_arg_1 = var_5; [L137] state_20 = init_21_arg_1 [L138] SORT_2 init_23_arg_1 = var_5; [L139] state_22 = init_23_arg_1 [L140] SORT_2 init_25_arg_1 = var_5; [L141] state_24 = init_25_arg_1 [L142] SORT_2 init_27_arg_1 = var_5; [L143] state_26 = init_27_arg_1 [L144] SORT_2 init_29_arg_1 = var_5; [L145] state_28 = init_29_arg_1 [L146] SORT_2 init_31_arg_1 = var_5; [L147] state_30 = init_31_arg_1 [L148] SORT_2 init_33_arg_1 = var_5; [L149] state_32 = init_33_arg_1 [L150] SORT_2 init_35_arg_1 = var_5; [L151] state_34 = init_35_arg_1 [L152] SORT_2 init_37_arg_1 = var_5; [L153] state_36 = init_37_arg_1 [L154] SORT_1 init_40_arg_1 = var_38; [L155] state_39 = init_40_arg_1 [L156] SORT_1 init_42_arg_1 = var_38; [L157] state_41 = init_42_arg_1 [L158] SORT_1 init_44_arg_1 = var_38; [L159] state_43 = init_44_arg_1 [L160] SORT_1 init_46_arg_1 = var_38; [L161] state_45 = init_46_arg_1 [L162] SORT_1 init_48_arg_1 = var_38; [L163] state_47 = init_48_arg_1 [L164] SORT_1 init_50_arg_1 = var_38; [L165] state_49 = init_50_arg_1 [L166] SORT_1 init_52_arg_1 = var_38; [L167] state_51 = init_52_arg_1 [L168] SORT_1 init_54_arg_1 = var_38; [L169] state_53 = init_54_arg_1 [L170] SORT_1 init_56_arg_1 = var_38; [L171] state_55 = init_56_arg_1 [L172] SORT_1 init_58_arg_1 = var_38; [L173] state_57 = init_58_arg_1 [L174] SORT_1 init_60_arg_1 = var_38; [L175] state_59 = init_60_arg_1 [L176] SORT_1 init_62_arg_1 = var_38; [L177] state_61 = init_62_arg_1 [L178] SORT_1 init_64_arg_1 = var_38; [L179] state_63 = init_64_arg_1 [L180] SORT_1 init_66_arg_1 = var_38; [L181] state_65 = init_66_arg_1 [L182] SORT_1 init_68_arg_1 = var_38; [L183] state_67 = init_68_arg_1 [L184] SORT_1 init_70_arg_1 = var_38; [L185] state_69 = init_70_arg_1 [L186] SORT_1 init_72_arg_1 = var_38; [L187] state_71 = init_72_arg_1 [L188] SORT_1 init_74_arg_1 = var_38; [L189] state_73 = init_74_arg_1 [L190] SORT_1 init_76_arg_1 = var_38; [L191] state_75 = init_76_arg_1 [L192] SORT_1 init_78_arg_1 = var_38; [L193] state_77 = init_78_arg_1 [L194] SORT_1 init_80_arg_1 = var_38; [L195] state_79 = init_80_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_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_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_30=0, state_32=0, state_34=0, state_36=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, var_116=0, var_158=2, var_306=4, var_318=4, var_320=12, var_38=0, var_425=2, var_469=3, var_5=0, var_81=1, var_82=0, var_94=0, var_96=1] [L198] input_93 = __VERIFIER_nondet_uchar() [L199] input_93 = input_93 & mask_SORT_1 [L200] input_95 = __VERIFIER_nondet_uchar() [L201] input_95 = input_95 & mask_SORT_1 [L202] input_100 = __VERIFIER_nondet_uchar() [L203] input_100 = input_100 & mask_SORT_1 [L204] input_101 = __VERIFIER_nondet_uchar() [L205] input_101 = input_101 & mask_SORT_1 [L206] input_105 = __VERIFIER_nondet_uchar() [L207] input_105 = input_105 & mask_SORT_1 [L208] input_106 = __VERIFIER_nondet_uchar() [L209] input_106 = input_106 & mask_SORT_1 [L210] input_110 = __VERIFIER_nondet_uchar() [L211] input_110 = input_110 & mask_SORT_1 [L212] input_111 = __VERIFIER_nondet_uchar() [L213] input_111 = input_111 & mask_SORT_1 [L214] input_115 = __VERIFIER_nondet_uchar() [L215] input_115 = input_115 & mask_SORT_1 [L216] input_123 = __VERIFIER_nondet_uchar() [L217] input_123 = input_123 & mask_SORT_1 [L218] input_130 = __VERIFIER_nondet_uchar() [L219] input_130 = input_130 & mask_SORT_1 [L220] input_137 = __VERIFIER_nondet_uchar() [L221] input_137 = input_137 & mask_SORT_1 [L222] input_144 = __VERIFIER_nondet_uchar() [L223] input_144 = input_144 & mask_SORT_1 [L224] input_148 = __VERIFIER_nondet_uchar() [L225] input_148 = input_148 & mask_SORT_1 [L226] input_149 = __VERIFIER_nondet_uchar() [L227] input_149 = input_149 & mask_SORT_1 [L228] input_166 = __VERIFIER_nondet_uchar() [L229] input_166 = input_166 & mask_SORT_1 [L230] input_170 = __VERIFIER_nondet_uchar() [L231] input_170 = input_170 & mask_SORT_1 [L232] input_171 = __VERIFIER_nondet_uchar() [L233] input_171 = input_171 & mask_SORT_1 [L234] input_187 = __VERIFIER_nondet_uchar() [L235] input_187 = input_187 & mask_SORT_1 [L236] input_191 = __VERIFIER_nondet_uchar() [L237] input_191 = input_191 & mask_SORT_1 [L238] input_192 = __VERIFIER_nondet_uchar() [L239] input_192 = input_192 & mask_SORT_1 [L240] input_208 = __VERIFIER_nondet_uchar() [L241] input_208 = input_208 & mask_SORT_1 [L242] input_212 = __VERIFIER_nondet_uchar() [L243] input_212 = input_212 & mask_SORT_1 [L244] input_213 = __VERIFIER_nondet_uchar() [L245] input_213 = input_213 & mask_SORT_1 [L246] input_236 = __VERIFIER_nondet_uchar() [L247] input_239 = __VERIFIER_nondet_uchar() [L248] input_255 = __VERIFIER_nondet_uchar() [L249] input_258 = __VERIFIER_nondet_uchar() [L250] input_274 = __VERIFIER_nondet_uchar() [L251] input_277 = __VERIFIER_nondet_uchar() [L252] input_293 = __VERIFIER_nondet_uchar() [L253] input_296 = __VERIFIER_nondet_uchar() [L256] SORT_1 var_83_arg_0 = state_47; [L257] SORT_4 var_83_arg_1 = var_81; [L258] SORT_4 var_83_arg_2 = var_82; [L259] EXPR var_83_arg_0 ? var_83_arg_1 : var_83_arg_2 [L259] SORT_4 var_83 = var_83_arg_0 ? var_83_arg_1 : var_83_arg_2; [L260] SORT_1 var_84_arg_0 = state_57; [L261] SORT_4 var_84_arg_1 = var_81; [L262] SORT_4 var_84_arg_2 = var_82; [L263] EXPR var_84_arg_0 ? var_84_arg_1 : var_84_arg_2 [L263] SORT_4 var_84 = var_84_arg_0 ? var_84_arg_1 : var_84_arg_2; [L264] SORT_4 var_85_arg_0 = var_83; [L265] SORT_4 var_85_arg_1 = var_84; [L266] SORT_4 var_85 = var_85_arg_0 + var_85_arg_1; [L267] SORT_1 var_86_arg_0 = state_67; [L268] SORT_4 var_86_arg_1 = var_81; [L269] SORT_4 var_86_arg_2 = var_82; [L270] EXPR var_86_arg_0 ? var_86_arg_1 : var_86_arg_2 [L270] SORT_4 var_86 = var_86_arg_0 ? var_86_arg_1 : var_86_arg_2; [L271] SORT_4 var_87_arg_0 = var_85; [L272] SORT_4 var_87_arg_1 = var_86; [L273] SORT_4 var_87 = var_87_arg_0 + var_87_arg_1; [L274] SORT_1 var_88_arg_0 = state_77; [L275] SORT_4 var_88_arg_1 = var_81; [L276] SORT_4 var_88_arg_2 = var_82; [L277] EXPR var_88_arg_0 ? var_88_arg_1 : var_88_arg_2 [L277] SORT_4 var_88 = var_88_arg_0 ? var_88_arg_1 : var_88_arg_2; [L278] SORT_4 var_89_arg_0 = var_87; [L279] SORT_4 var_89_arg_1 = var_88; [L280] SORT_4 var_89 = var_89_arg_0 + var_89_arg_1; [L281] var_89 = var_89 & mask_SORT_4 [L282] SORT_4 var_90_arg_0 = var_89; [L283] SORT_4 var_90_arg_1 = var_81; [L284] SORT_1 var_90 = var_90_arg_0 <= var_90_arg_1; [L285] SORT_1 var_91_arg_0 = ~state_79; [L286] var_91_arg_0 = var_91_arg_0 & mask_SORT_1 [L287] SORT_1 var_91_arg_1 = ~var_90; [L288] var_91_arg_1 = var_91_arg_1 & mask_SORT_1 [L289] SORT_1 var_91 = var_91_arg_0 & var_91_arg_1; [L290] var_91 = var_91 & mask_SORT_1 [L291] SORT_1 bad_92_arg_0 = var_91; [L292] CALL __VERIFIER_assert(!(bad_92_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s 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 01:59:03,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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 33bfd955bc64a66d8dbe5590b4a6476efcc4a3015059ca9bfec2b3731c08a02e --- 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 01:59:06,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:59:06,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:59:06,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:59:06,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:59:06,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:59:06,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:59:06,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:59:06,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:59:06,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:59:06,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:59:06,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:59:06,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:59:06,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:59:06,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:59:06,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:59:06,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:59:06,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:59:06,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:59:06,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:59:06,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:59:06,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:59:06,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:59:06,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:59:06,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:59:06,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:59:06,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:59:06,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:59:06,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:59:06,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:59:06,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:59:06,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:59:06,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:59:06,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:59:06,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:59:06,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:59:06,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:59:06,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:59:06,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:59:06,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:59:06,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:59:06,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:59:06,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:59:06,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:59:06,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:59:06,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:59:06,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:59:06,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:59:06,468 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:59:06,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:59:06,468 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:59:06,469 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:59:06,470 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:59:06,470 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:59:06,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:59:06,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:59:06,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:59:06,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:59:06,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:59:06,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:59:06,473 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:59:06,473 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:59:06,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:59:06,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:59:06,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:59:06,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:59:06,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:59:06,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:59:06,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:06,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:59:06,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:59:06,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:59:06,476 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:59:06,476 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:59:06,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:59:06,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:59:06,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:59:06,477 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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33bfd955bc64a66d8dbe5590b4a6476efcc4a3015059ca9bfec2b3731c08a02e [2022-11-03 01:59:06,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:59:06,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:59:06,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:59:06,928 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:59:06,930 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:59:06,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c [2022-11-03 01:59:07,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/ba001a0b4/0397d69580554858804e008cef448e21/FLAG20652aa58 [2022-11-03 01:59:07,811 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:59:07,817 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c [2022-11-03 01:59:07,856 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/ba001a0b4/0397d69580554858804e008cef448e21/FLAG20652aa58 [2022-11-03 01:59:07,944 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/data/ba001a0b4/0397d69580554858804e008cef448e21 [2022-11-03 01:59:07,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:59:07,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:59:07,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:07,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:59:07,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:59:07,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:07" (1/1) ... [2022-11-03 01:59:07,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@189192cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:07, skipping insertion in model container [2022-11-03 01:59:07,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:07" (1/1) ... [2022-11-03 01:59:07,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:59:08,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:59:08,269 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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c[1014,1027] [2022-11-03 01:59:08,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:08,773 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:59:08,785 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_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.7.prop1-func-interl.c[1014,1027] [2022-11-03 01:59:08,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:09,019 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:59:09,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09 WrapperNode [2022-11-03 01:59:09,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:09,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:09,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:59:09,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:59:09,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,212 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2442 [2022-11-03 01:59:09,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:09,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:59:09,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:59:09,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:59:09,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,290 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:59:09,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:59:09,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:59:09,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:59:09,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (1/1) ... [2022-11-03 01:59:09,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:09,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:09,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:59:09,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:59:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:59:09,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:59:10,138 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:59:10,140 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:59:12,470 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:59:12,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:59:12,484 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:59:12,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:12 BoogieIcfgContainer [2022-11-03 01:59:12,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:59:12,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:59:12,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:59:12,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:59:12,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:59:07" (1/3) ... [2022-11-03 01:59:12,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f99bf9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:12, skipping insertion in model container [2022-11-03 01:59:12,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:09" (2/3) ... [2022-11-03 01:59:12,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f99bf9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:12, skipping insertion in model container [2022-11-03 01:59:12,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:12" (3/3) ... [2022-11-03 01:59:12,497 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.7.prop1-func-interl.c [2022-11-03 01:59:12,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:59:12,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:59:12,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:59:12,605 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;@51ceaf65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:59:12,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:59:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.4967320261437909) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:59:12,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:12,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:12,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1165686489, now seen corresponding path program 1 times [2022-11-03 01:59:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:12,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605829878] [2022-11-03 01:59:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:12,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:12,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:12,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:12,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:59:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:59:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:13,293 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 01:59:13,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:13,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:13,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605829878] [2022-11-03 01:59:13,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605829878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:13,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:13,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:13,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150522849] [2022-11-03 01:59:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:13,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:13,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:13,343 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.4967320261437909) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 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 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:13,714 INFO L93 Difference]: Finished difference Result 601 states and 899 transitions. [2022-11-03 01:59:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:13,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:59:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:13,731 INFO L225 Difference]: With dead ends: 601 [2022-11-03 01:59:13,732 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 01:59:13,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:13,739 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 655 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:13,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 871 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:59:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 01:59:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 153. [2022-11-03 01:59:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 225 transitions. [2022-11-03 01:59:13,786 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 225 transitions. Word has length 13 [2022-11-03 01:59:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:13,787 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 225 transitions. [2022-11-03 01:59:13,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 225 transitions. [2022-11-03 01:59:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:59:13,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:13,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:13,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:14,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:14,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash 772659479, now seen corresponding path program 1 times [2022-11-03 01:59:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:14,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52283250] [2022-11-03 01:59:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:14,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:14,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:14,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:14,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:59:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:14,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:59:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:14,555 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 01:59:14,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:14,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:14,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52283250] [2022-11-03 01:59:14,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52283250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:14,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:14,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:14,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585396138] [2022-11-03 01:59:14,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:14,560 INFO L87 Difference]: Start difference. First operand 153 states and 225 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:14,807 INFO L93 Difference]: Finished difference Result 597 states and 883 transitions. [2022-11-03 01:59:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:59:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:14,812 INFO L225 Difference]: With dead ends: 597 [2022-11-03 01:59:14,812 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 01:59:14,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 01:59:14,814 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 649 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:14,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 870 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 01:59:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 155. [2022-11-03 01:59:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.474025974025974) internal successors, (227), 154 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 227 transitions. [2022-11-03 01:59:14,827 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 227 transitions. Word has length 13 [2022-11-03 01:59:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:14,827 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 227 transitions. [2022-11-03 01:59:14,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 227 transitions. [2022-11-03 01:59:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:59:14,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:14,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:14,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:15,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:15,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash -36687147, now seen corresponding path program 1 times [2022-11-03 01:59:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:15,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241214073] [2022-11-03 01:59:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:15,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:15,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:15,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:15,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:59:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:59:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:15,564 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 01:59:15,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:15,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:15,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241214073] [2022-11-03 01:59:15,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241214073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:15,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:15,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:15,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315394553] [2022-11-03 01:59:15,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:15,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:15,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:15,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:15,568 INFO L87 Difference]: Start difference. First operand 155 states and 227 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:15,830 INFO L93 Difference]: Finished difference Result 597 states and 882 transitions. [2022-11-03 01:59:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:15,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:59:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:15,835 INFO L225 Difference]: With dead ends: 597 [2022-11-03 01:59:15,835 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 01:59:15,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 01:59:15,837 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 643 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:15,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 869 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 01:59:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 157. [2022-11-03 01:59:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4679487179487178) internal successors, (229), 156 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-11-03 01:59:15,847 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 13 [2022-11-03 01:59:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:15,848 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-11-03 01:59:15,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-11-03 01:59:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:59:15,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:15,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:15,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:16,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:16,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash 20571155, now seen corresponding path program 1 times [2022-11-03 01:59:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:16,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775194059] [2022-11-03 01:59:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:16,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:16,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:16,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:16,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:59:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:16,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:59:16,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:16,607 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 01:59:16,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:16,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775194059] [2022-11-03 01:59:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775194059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:16,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:16,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206577666] [2022-11-03 01:59:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:16,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:16,611 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:16,821 INFO L93 Difference]: Finished difference Result 597 states and 881 transitions. [2022-11-03 01:59:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:59:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:16,826 INFO L225 Difference]: With dead ends: 597 [2022-11-03 01:59:16,827 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 01:59:16,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 01:59:16,828 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 637 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:16,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 871 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 01:59:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 159. [2022-11-03 01:59:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.4620253164556962) internal successors, (231), 158 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 231 transitions. [2022-11-03 01:59:16,839 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 231 transitions. Word has length 13 [2022-11-03 01:59:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:16,839 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 231 transitions. [2022-11-03 01:59:16,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 231 transitions. [2022-11-03 01:59:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:59:16,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:16,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:16,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:17,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:17,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash 20630737, now seen corresponding path program 1 times [2022-11-03 01:59:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554705012] [2022-11-03 01:59:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:17,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:17,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:17,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:17,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:59:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 01:59:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:17,928 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 01:59:17,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:17,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:17,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554705012] [2022-11-03 01:59:17,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554705012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:17,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:17,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 01:59:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187029357] [2022-11-03 01:59:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:17,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:59:17,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:17,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:59:17,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:59:17,931 INFO L87 Difference]: Start difference. First operand 159 states and 231 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:20,313 INFO L93 Difference]: Finished difference Result 789 states and 1159 transitions. [2022-11-03 01:59:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 01:59:20,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:59:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:20,317 INFO L225 Difference]: With dead ends: 789 [2022-11-03 01:59:20,317 INFO L226 Difference]: Without dead ends: 787 [2022-11-03 01:59:20,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:59:20,319 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1947 mSDsluCounter, 2967 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:20,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 3193 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 01:59:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-11-03 01:59:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 167. [2022-11-03 01:59:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4578313253012047) internal successors, (242), 166 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 242 transitions. [2022-11-03 01:59:20,331 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 242 transitions. Word has length 13 [2022-11-03 01:59:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:20,331 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 242 transitions. [2022-11-03 01:59:20,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 242 transitions. [2022-11-03 01:59:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:20,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:20,336 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:20,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:20,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:20,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2059721643, now seen corresponding path program 1 times [2022-11-03 01:59:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:20,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377559107] [2022-11-03 01:59:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:20,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:20,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:20,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:20,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:59:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:22,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:22,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:22,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377559107] [2022-11-03 01:59:22,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377559107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:22,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:22,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051565924] [2022-11-03 01:59:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:22,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:22,017 INFO L87 Difference]: Start difference. First operand 167 states and 242 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:22,223 INFO L93 Difference]: Finished difference Result 619 states and 911 transitions. [2022-11-03 01:59:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:22,229 INFO L225 Difference]: With dead ends: 619 [2022-11-03 01:59:22,229 INFO L226 Difference]: Without dead ends: 462 [2022-11-03 01:59:22,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 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 01:59:22,231 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 519 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:22,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 857 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-03 01:59:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 213. [2022-11-03 01:59:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4575471698113207) internal successors, (309), 212 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 309 transitions. [2022-11-03 01:59:22,251 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 309 transitions. Word has length 160 [2022-11-03 01:59:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:22,254 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 309 transitions. [2022-11-03 01:59:22,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 309 transitions. [2022-11-03 01:59:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:22,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:22,266 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:22,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:22,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:22,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:22,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2116804179, now seen corresponding path program 1 times [2022-11-03 01:59:22,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:22,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748025836] [2022-11-03 01:59:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:22,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:22,471 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:22,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:59:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:23,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:23,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:23,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:23,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748025836] [2022-11-03 01:59:23,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748025836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:23,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:23,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774676094] [2022-11-03 01:59:23,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:23,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:23,880 INFO L87 Difference]: Start difference. First operand 213 states and 309 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:24,170 INFO L93 Difference]: Finished difference Result 682 states and 1001 transitions. [2022-11-03 01:59:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:24,173 INFO L225 Difference]: With dead ends: 682 [2022-11-03 01:59:24,174 INFO L226 Difference]: Without dead ends: 525 [2022-11-03 01:59:24,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:24,175 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 812 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1269 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 01:59:24,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1269 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:24,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-03 01:59:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 215. [2022-11-03 01:59:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4532710280373833) internal successors, (311), 214 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2022-11-03 01:59:24,184 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 160 [2022-11-03 01:59:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:24,184 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2022-11-03 01:59:24,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2022-11-03 01:59:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:24,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:24,187 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:24,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:24,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 144769071, now seen corresponding path program 1 times [2022-11-03 01:59:24,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:24,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025873163] [2022-11-03 01:59:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:24,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:24,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:24,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:24,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:59:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:59:25,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:25,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:25,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025873163] [2022-11-03 01:59:25,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025873163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:25,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:25,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:59:25,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549394008] [2022-11-03 01:59:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:25,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:59:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:59:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:59:25,862 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:26,072 INFO L93 Difference]: Finished difference Result 424 states and 619 transitions. [2022-11-03 01:59:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:59:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:26,075 INFO L225 Difference]: With dead ends: 424 [2022-11-03 01:59:26,075 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 01:59:26,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:59:26,076 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 83 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:26,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1148 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-11-03 01:59:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 01:59:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-11-03 01:59:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.4511278195488722) internal successors, (386), 266 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 386 transitions. [2022-11-03 01:59:26,084 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 386 transitions. Word has length 160 [2022-11-03 01:59:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:26,085 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 386 transitions. [2022-11-03 01:59:26,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 386 transitions. [2022-11-03 01:59:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:26,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:26,088 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:26,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:26,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:26,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash 915502637, now seen corresponding path program 1 times [2022-11-03 01:59:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:26,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171424221] [2022-11-03 01:59:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:26,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:26,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:26,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:26,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:59:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:27,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:27,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:27,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171424221] [2022-11-03 01:59:27,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171424221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:27,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:27,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:27,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357074843] [2022-11-03 01:59:27,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:27,767 INFO L87 Difference]: Start difference. First operand 267 states and 386 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:27,960 INFO L93 Difference]: Finished difference Result 671 states and 984 transitions. [2022-11-03 01:59:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:27,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:27,967 INFO L225 Difference]: With dead ends: 671 [2022-11-03 01:59:27,968 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 01:59:27,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 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 01:59:27,970 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 467 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:27,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 855 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 01:59:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 285. [2022-11-03 01:59:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4507042253521127) internal successors, (412), 284 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 01:59:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 412 transitions. [2022-11-03 01:59:27,982 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 412 transitions. Word has length 160 [2022-11-03 01:59:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:27,983 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 412 transitions. [2022-11-03 01:59:27,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 412 transitions. [2022-11-03 01:59:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:27,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:27,986 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:28,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:28,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:28,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1502981841, now seen corresponding path program 1 times [2022-11-03 01:59:28,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:28,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366211055] [2022-11-03 01:59:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:28,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:28,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:28,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:28,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:59:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:29,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:29,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:29,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:29,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366211055] [2022-11-03 01:59:29,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366211055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:29,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:29,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:29,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936994432] [2022-11-03 01:59:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:29,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:29,668 INFO L87 Difference]: Start difference. First operand 285 states and 412 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:29,930 INFO L93 Difference]: Finished difference Result 754 states and 1104 transitions. [2022-11-03 01:59:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:29,933 INFO L225 Difference]: With dead ends: 754 [2022-11-03 01:59:29,934 INFO L226 Difference]: Without dead ends: 597 [2022-11-03 01:59:29,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:29,935 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 790 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:29,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 1266 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-11-03 01:59:29,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 287. [2022-11-03 01:59:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4475524475524475) internal successors, (414), 286 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 01:59:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 414 transitions. [2022-11-03 01:59:29,945 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 414 transitions. Word has length 160 [2022-11-03 01:59:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:29,945 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 414 transitions. [2022-11-03 01:59:29,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 414 transitions. [2022-11-03 01:59:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:29,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:29,948 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:29,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:30,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:30,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:30,172 INFO L85 PathProgramCache]: Analyzing trace with hash -178125647, now seen corresponding path program 1 times [2022-11-03 01:59:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:30,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615639398] [2022-11-03 01:59:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:30,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:30,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:30,175 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:30,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:59:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:31,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:31,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:31,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615639398] [2022-11-03 01:59:31,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615639398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:31,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:31,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:31,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083740374] [2022-11-03 01:59:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:31,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:31,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:31,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:31,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:31,521 INFO L87 Difference]: Start difference. First operand 287 states and 414 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:31,688 INFO L93 Difference]: Finished difference Result 671 states and 982 transitions. [2022-11-03 01:59:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:31,692 INFO L225 Difference]: With dead ends: 671 [2022-11-03 01:59:31,692 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 01:59:31,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 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 01:59:31,693 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 415 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:31,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 853 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 01:59:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 305. [2022-11-03 01:59:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.4473684210526316) internal successors, (440), 304 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 440 transitions. [2022-11-03 01:59:31,703 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 440 transitions. Word has length 160 [2022-11-03 01:59:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:31,703 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 440 transitions. [2022-11-03 01:59:31,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 440 transitions. [2022-11-03 01:59:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:31,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:31,706 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:31,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:31,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:31,930 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1864305485, now seen corresponding path program 1 times [2022-11-03 01:59:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983735985] [2022-11-03 01:59:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:31,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:31,934 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:31,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:59:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:32,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:33,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:33,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983735985] [2022-11-03 01:59:33,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983735985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:33,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:33,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:33,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409895541] [2022-11-03 01:59:33,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:33,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:33,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:33,281 INFO L87 Difference]: Start difference. First operand 305 states and 440 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:33,513 INFO L93 Difference]: Finished difference Result 774 states and 1132 transitions. [2022-11-03 01:59:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:33,515 INFO L225 Difference]: With dead ends: 774 [2022-11-03 01:59:33,516 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 01:59:33,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:33,517 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 768 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:33,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1263 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 01:59:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 307. [2022-11-03 01:59:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4444444444444444) internal successors, (442), 306 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 442 transitions. [2022-11-03 01:59:33,527 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 442 transitions. Word has length 160 [2022-11-03 01:59:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:33,527 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 442 transitions. [2022-11-03 01:59:33,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 442 transitions. [2022-11-03 01:59:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:33,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:33,530 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:33,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 01:59:33,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:33,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2013265205, now seen corresponding path program 1 times [2022-11-03 01:59:33,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:33,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133996152] [2022-11-03 01:59:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:33,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:33,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:33,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:59:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:34,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:59:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:34,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:34,966 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:34,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133996152] [2022-11-03 01:59:34,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133996152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:34,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:34,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:59:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307899479] [2022-11-03 01:59:34,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:59:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:59:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:59:34,968 INFO L87 Difference]: Start difference. First operand 307 states and 442 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:35,350 INFO L93 Difference]: Finished difference Result 798 states and 1161 transitions. [2022-11-03 01:59:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:35,353 INFO L225 Difference]: With dead ends: 798 [2022-11-03 01:59:35,353 INFO L226 Difference]: Without dead ends: 641 [2022-11-03 01:59:35,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:59:35,355 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 485 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:35,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1901 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-11-03 01:59:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-11-03 01:59:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 437. [2022-11-03 01:59:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.438073394495413) internal successors, (627), 436 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 627 transitions. [2022-11-03 01:59:35,372 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 627 transitions. Word has length 160 [2022-11-03 01:59:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:35,372 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 627 transitions. [2022-11-03 01:59:35,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 627 transitions. [2022-11-03 01:59:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:35,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:35,375 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:35,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:35,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:35,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1721002313, now seen corresponding path program 1 times [2022-11-03 01:59:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:35,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957909134] [2022-11-03 01:59:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:35,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:35,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:35,594 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:35,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:59:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:59:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:36,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:36,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:36,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957909134] [2022-11-03 01:59:36,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957909134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:36,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:36,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:59:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660565944] [2022-11-03 01:59:36,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:36,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:59:36,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:59:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:59:36,955 INFO L87 Difference]: Start difference. First operand 437 states and 627 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:37,161 INFO L93 Difference]: Finished difference Result 624 states and 899 transitions. [2022-11-03 01:59:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:59:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:37,164 INFO L225 Difference]: With dead ends: 624 [2022-11-03 01:59:37,164 INFO L226 Difference]: Without dead ends: 467 [2022-11-03 01:59:37,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:59:37,165 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 60 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:37,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1200 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-11-03 01:59:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-11-03 01:59:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2022-11-03 01:59:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.4291845493562232) internal successors, (666), 466 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 666 transitions. [2022-11-03 01:59:37,176 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 666 transitions. Word has length 160 [2022-11-03 01:59:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:37,176 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 666 transitions. [2022-11-03 01:59:37,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 666 transitions. [2022-11-03 01:59:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:37,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:37,179 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:37,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:37,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:37,394 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1313047733, now seen corresponding path program 1 times [2022-11-03 01:59:37,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:37,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569989460] [2022-11-03 01:59:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:37,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:37,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:37,398 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:37,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:59:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:38,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:38,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:38,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:38,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:38,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569989460] [2022-11-03 01:59:38,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569989460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:38,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:38,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142080840] [2022-11-03 01:59:38,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:38,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:38,844 INFO L87 Difference]: Start difference. First operand 467 states and 666 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:39,026 INFO L93 Difference]: Finished difference Result 831 states and 1204 transitions. [2022-11-03 01:59:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:39,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:39,031 INFO L225 Difference]: With dead ends: 831 [2022-11-03 01:59:39,031 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 01:59:39,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 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 01:59:39,032 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 363 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:39,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 851 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 01:59:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 485. [2022-11-03 01:59:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.4297520661157024) internal successors, (692), 484 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 01:59:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 692 transitions. [2022-11-03 01:59:39,044 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 692 transitions. Word has length 160 [2022-11-03 01:59:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:39,044 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 692 transitions. [2022-11-03 01:59:39,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 692 transitions. [2022-11-03 01:59:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:39,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:39,047 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:39,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:39,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:39,271 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:39,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2088433225, now seen corresponding path program 1 times [2022-11-03 01:59:39,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:39,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690070945] [2022-11-03 01:59:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:39,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:39,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:39,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:39,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:59:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:40,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:40,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:40,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:40,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690070945] [2022-11-03 01:59:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690070945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:40,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:40,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:40,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710028678] [2022-11-03 01:59:40,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:40,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:40,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:40,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:40,527 INFO L87 Difference]: Start difference. First operand 485 states and 692 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:40,764 INFO L93 Difference]: Finished difference Result 894 states and 1294 transitions. [2022-11-03 01:59:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:40,767 INFO L225 Difference]: With dead ends: 894 [2022-11-03 01:59:40,768 INFO L226 Difference]: Without dead ends: 737 [2022-11-03 01:59:40,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:40,769 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 630 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:40,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1182 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-03 01:59:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 495. [2022-11-03 01:59:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.4291497975708503) internal successors, (706), 494 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 706 transitions. [2022-11-03 01:59:40,781 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 706 transitions. Word has length 160 [2022-11-03 01:59:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:40,782 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 706 transitions. [2022-11-03 01:59:40,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 706 transitions. [2022-11-03 01:59:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:40,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:40,785 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:40,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:40,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:40,999 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1362528569, now seen corresponding path program 1 times [2022-11-03 01:59:41,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:41,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692579916] [2022-11-03 01:59:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:41,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:41,003 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:41,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:59:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:41,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:41,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:42,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:42,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:42,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692579916] [2022-11-03 01:59:42,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692579916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:42,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:42,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:42,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878259354] [2022-11-03 01:59:42,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:42,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:42,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:42,212 INFO L87 Difference]: Start difference. First operand 495 states and 706 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:42,484 INFO L93 Difference]: Finished difference Result 894 states and 1293 transitions. [2022-11-03 01:59:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:42,487 INFO L225 Difference]: With dead ends: 894 [2022-11-03 01:59:42,488 INFO L226 Difference]: Without dead ends: 737 [2022-11-03 01:59:42,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:42,490 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 623 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1157 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 01:59:42,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-03 01:59:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 497. [2022-11-03 01:59:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.4274193548387097) internal successors, (708), 496 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 708 transitions. [2022-11-03 01:59:42,503 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 708 transitions. Word has length 160 [2022-11-03 01:59:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:42,503 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 708 transitions. [2022-11-03 01:59:42,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 708 transitions. [2022-11-03 01:59:42,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:42,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:42,506 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:42,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:42,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:42,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:42,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1290142011, now seen corresponding path program 1 times [2022-11-03 01:59:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:42,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193315126] [2022-11-03 01:59:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:42,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:42,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:42,734 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:42,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:59:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:44,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:44,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:44,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193315126] [2022-11-03 01:59:44,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193315126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:44,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:44,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:44,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826414777] [2022-11-03 01:59:44,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:44,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:44,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:44,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:44,039 INFO L87 Difference]: Start difference. First operand 497 states and 708 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:44,247 INFO L93 Difference]: Finished difference Result 914 states and 1322 transitions. [2022-11-03 01:59:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:44,250 INFO L225 Difference]: With dead ends: 914 [2022-11-03 01:59:44,250 INFO L226 Difference]: Without dead ends: 757 [2022-11-03 01:59:44,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:44,252 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 643 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:44,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1200 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-03 01:59:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 501. [2022-11-03 01:59:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.426) internal successors, (713), 500 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 713 transitions. [2022-11-03 01:59:44,265 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 713 transitions. Word has length 160 [2022-11-03 01:59:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:44,266 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 713 transitions. [2022-11-03 01:59:44,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 713 transitions. [2022-11-03 01:59:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:44,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:44,269 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:44,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:44,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:44,491 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1618621891, now seen corresponding path program 1 times [2022-11-03 01:59:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919696329] [2022-11-03 01:59:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:44,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:44,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:44,494 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:44,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:59:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:45,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:45,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:45,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919696329] [2022-11-03 01:59:45,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919696329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:45,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:45,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:45,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300947669] [2022-11-03 01:59:45,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:45,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:45,756 INFO L87 Difference]: Start difference. First operand 501 states and 713 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:46,009 INFO L93 Difference]: Finished difference Result 914 states and 1321 transitions. [2022-11-03 01:59:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:46,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:46,011 INFO L225 Difference]: With dead ends: 914 [2022-11-03 01:59:46,011 INFO L226 Difference]: Without dead ends: 757 [2022-11-03 01:59:46,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:46,013 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 636 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:46,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1175 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-03 01:59:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 503. [2022-11-03 01:59:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4243027888446216) internal successors, (715), 502 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 715 transitions. [2022-11-03 01:59:46,027 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 715 transitions. Word has length 160 [2022-11-03 01:59:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:46,027 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 715 transitions. [2022-11-03 01:59:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 715 transitions. [2022-11-03 01:59:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:46,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:46,029 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:46,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:46,251 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash 304606143, now seen corresponding path program 1 times [2022-11-03 01:59:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:46,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655151948] [2022-11-03 01:59:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:46,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:46,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:46,254 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:46,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:59:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:47,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:47,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:47,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:47,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655151948] [2022-11-03 01:59:47,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655151948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:47,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:47,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:47,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356234613] [2022-11-03 01:59:47,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:47,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:47,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:47,532 INFO L87 Difference]: Start difference. First operand 503 states and 715 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:47,936 INFO L93 Difference]: Finished difference Result 818 states and 1180 transitions. [2022-11-03 01:59:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:47,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:47,940 INFO L225 Difference]: With dead ends: 818 [2022-11-03 01:59:47,941 INFO L226 Difference]: Without dead ends: 661 [2022-11-03 01:59:47,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:47,942 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 498 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:47,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 967 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:59:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-03 01:59:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 505. [2022-11-03 01:59:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.4226190476190477) internal successors, (717), 504 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 717 transitions. [2022-11-03 01:59:47,957 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 717 transitions. Word has length 160 [2022-11-03 01:59:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:47,957 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 717 transitions. [2022-11-03 01:59:47,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 717 transitions. [2022-11-03 01:59:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:47,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:47,959 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:47,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:48,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:48,184 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:48,184 INFO L85 PathProgramCache]: Analyzing trace with hash 164057533, now seen corresponding path program 1 times [2022-11-03 01:59:48,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:48,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157035326] [2022-11-03 01:59:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:48,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:48,187 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:48,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:59:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:49,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:49,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:49,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:49,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:49,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157035326] [2022-11-03 01:59:49,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157035326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:49,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:49,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:49,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702208578] [2022-11-03 01:59:49,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:49,516 INFO L87 Difference]: Start difference. First operand 505 states and 717 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:49,699 INFO L93 Difference]: Finished difference Result 934 states and 1349 transitions. [2022-11-03 01:59:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:49,704 INFO L225 Difference]: With dead ends: 934 [2022-11-03 01:59:49,704 INFO L226 Difference]: Without dead ends: 777 [2022-11-03 01:59:49,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:49,705 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 654 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:49,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1217 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-03 01:59:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 507. [2022-11-03 01:59:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.4209486166007905) internal successors, (719), 506 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 719 transitions. [2022-11-03 01:59:49,721 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 719 transitions. Word has length 160 [2022-11-03 01:59:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:49,721 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 719 transitions. [2022-11-03 01:59:49,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 719 transitions. [2022-11-03 01:59:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:49,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:49,723 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:49,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 01:59:49,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:49,930 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1641380801, now seen corresponding path program 1 times [2022-11-03 01:59:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:49,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108587092] [2022-11-03 01:59:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:49,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:49,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:49,933 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:49,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:59:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:51,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:51,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:51,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108587092] [2022-11-03 01:59:51,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108587092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:51,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:51,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:51,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980553218] [2022-11-03 01:59:51,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:51,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:51,246 INFO L87 Difference]: Start difference. First operand 507 states and 719 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:51,454 INFO L93 Difference]: Finished difference Result 934 states and 1348 transitions. [2022-11-03 01:59:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:51,460 INFO L225 Difference]: With dead ends: 934 [2022-11-03 01:59:51,460 INFO L226 Difference]: Without dead ends: 777 [2022-11-03 01:59:51,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:51,461 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 647 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:51,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1192 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-03 01:59:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 509. [2022-11-03 01:59:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.419291338582677) internal successors, (721), 508 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:51,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 721 transitions. [2022-11-03 01:59:51,475 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 721 transitions. Word has length 160 [2022-11-03 01:59:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:51,476 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 721 transitions. [2022-11-03 01:59:51,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 721 transitions. [2022-11-03 01:59:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:51,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:51,478 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:51,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:51,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:51,702 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1218678975, now seen corresponding path program 1 times [2022-11-03 01:59:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:51,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311331643] [2022-11-03 01:59:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:51,705 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:51,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:59:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:53,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:53,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311331643] [2022-11-03 01:59:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311331643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:53,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:53,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099956275] [2022-11-03 01:59:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:53,020 INFO L87 Difference]: Start difference. First operand 509 states and 721 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:53,216 INFO L93 Difference]: Finished difference Result 954 states and 1377 transitions. [2022-11-03 01:59:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:53,219 INFO L225 Difference]: With dead ends: 954 [2022-11-03 01:59:53,219 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:59:53,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:53,221 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 667 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:53,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1235 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:59:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 513. [2022-11-03 01:59:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.41796875) internal successors, (726), 512 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 01:59:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 726 transitions. [2022-11-03 01:59:53,236 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 726 transitions. Word has length 160 [2022-11-03 01:59:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:53,236 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 726 transitions. [2022-11-03 01:59:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 726 transitions. [2022-11-03 01:59:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:53,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:53,238 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:53,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 01:59:53,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:53,445 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1487940419, now seen corresponding path program 1 times [2022-11-03 01:59:53,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:53,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904914016] [2022-11-03 01:59:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:53,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:53,448 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:53,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:59:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:54,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:54,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:54,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904914016] [2022-11-03 01:59:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904914016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:54,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:54,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:54,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34913134] [2022-11-03 01:59:54,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:54,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:54,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:54,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:54,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:54,773 INFO L87 Difference]: Start difference. First operand 513 states and 726 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:54,994 INFO L93 Difference]: Finished difference Result 954 states and 1376 transitions. [2022-11-03 01:59:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:54,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 01:59:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:54,999 INFO L225 Difference]: With dead ends: 954 [2022-11-03 01:59:54,999 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:59:54,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:59:55,000 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 660 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:55,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1210 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:59:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 515. [2022-11-03 01:59:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.416342412451362) internal successors, (728), 514 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 01:59:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 728 transitions. [2022-11-03 01:59:55,014 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 728 transitions. Word has length 160 [2022-11-03 01:59:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 728 transitions. [2022-11-03 01:59:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 728 transitions. [2022-11-03 01:59:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 01:59:55,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:55,017 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:59:55,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:55,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:55,242 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash 208076741, now seen corresponding path program 1 times [2022-11-03 01:59:55,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:55,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15737338] [2022-11-03 01:59:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:55,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:55,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:55,245 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:55,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:59:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:59:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:57,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:58,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15737338] [2022-11-03 01:59:58,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15737338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [853159309] [2022-11-03 01:59:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:58,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:59:58,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:59:58,057 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:59:58,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 01:59:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:59,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:59:59,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:00,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:01,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [853159309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425025665] [2022-11-03 02:00:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:01,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:01,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:00:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:02,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:02,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:03,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425025665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:03,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:00:03,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:00:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743857383] [2022-11-03 02:00:03,474 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:03,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:00:03,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:03,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:00:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:00:03,478 INFO L87 Difference]: Start difference. First operand 515 states and 728 transitions. Second operand has 16 states, 16 states have (on average 19.4375) internal successors, (311), 16 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:03,818 INFO L93 Difference]: Finished difference Result 1100 states and 1563 transitions. [2022-11-03 02:00:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:00:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.4375) internal successors, (311), 16 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:00:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:03,821 INFO L225 Difference]: With dead ends: 1100 [2022-11-03 02:00:03,822 INFO L226 Difference]: Without dead ends: 943 [2022-11-03 02:00:03,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 936 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:00:03,823 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1194 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:03,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 2235 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-03 02:00:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-03 02:00:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 814. [2022-11-03 02:00:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 1.4022140221402215) internal successors, (1140), 813 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1140 transitions. [2022-11-03 02:00:03,849 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1140 transitions. Word has length 160 [2022-11-03 02:00:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:03,850 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1140 transitions. [2022-11-03 02:00:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.4375) internal successors, (311), 16 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1140 transitions. [2022-11-03 02:00:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:00:03,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:03,852 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:00:03,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:04,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 02:00:04,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-03 02:00:04,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:04,467 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash -184950269, now seen corresponding path program 1 times [2022-11-03 02:00:04,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:04,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356975309] [2022-11-03 02:00:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:04,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:04,470 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:04,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:00:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:05,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:05,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:06,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:07,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:07,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356975309] [2022-11-03 02:00:07,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356975309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:07,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274156484] [2022-11-03 02:00:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:07,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:07,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:00:07,133 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:00:07,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:00:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:09,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:10,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274156484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:10,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301735824] [2022-11-03 02:00:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:10,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:10,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:10,280 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:10,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:00:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:11,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:12,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301735824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:12,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:00:12,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:00:12,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908421195] [2022-11-03 02:00:12,424 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:12,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:00:12,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:00:12,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:00:12,426 INFO L87 Difference]: Start difference. First operand 814 states and 1140 transitions. Second operand has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:12,693 INFO L93 Difference]: Finished difference Result 1668 states and 2342 transitions. [2022-11-03 02:00:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:00:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:00:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:12,698 INFO L225 Difference]: With dead ends: 1668 [2022-11-03 02:00:12,698 INFO L226 Difference]: Without dead ends: 1511 [2022-11-03 02:00:12,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 936 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:00:12,700 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 719 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:12,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 2543 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-03 02:00:12,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2022-11-03 02:00:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1384. [2022-11-03 02:00:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.3890093998553867) internal successors, (1921), 1383 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1921 transitions. [2022-11-03 02:00:12,737 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1921 transitions. Word has length 160 [2022-11-03 02:00:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:12,738 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1921 transitions. [2022-11-03 02:00:12,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1921 transitions. [2022-11-03 02:00:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:00:12,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:12,741 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] [2022-11-03 02:00:12,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-03 02:00:12,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:00:13,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-03 02:00:13,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:13,359 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash -994296895, now seen corresponding path program 1 times [2022-11-03 02:00:13,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:13,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681340877] [2022-11-03 02:00:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:13,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:13,362 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:13,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:00:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:14,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:15,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:16,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681340877] [2022-11-03 02:00:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681340877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [250675563] [2022-11-03 02:00:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:16,163 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:16,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:00:16,164 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:00:16,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:00:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:18,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:19,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [250675563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377805747] [2022-11-03 02:00:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:19,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:19,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:19,379 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:19,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:00:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:20,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:20,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:21,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377805747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:21,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:00:21,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:00:21,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121113145] [2022-11-03 02:00:21,565 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:21,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:00:21,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:21,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:00:21,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:00:21,567 INFO L87 Difference]: Start difference. First operand 1384 states and 1921 transitions. Second operand has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:21,811 INFO L93 Difference]: Finished difference Result 2678 states and 3710 transitions. [2022-11-03 02:00:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:00:21,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:00:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:21,821 INFO L225 Difference]: With dead ends: 2678 [2022-11-03 02:00:21,821 INFO L226 Difference]: Without dead ends: 2521 [2022-11-03 02:00:21,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 936 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:00:21,823 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 539 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:21,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 2934 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 02:00:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2022-11-03 02:00:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2404. [2022-11-03 02:00:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 1.3745318352059925) internal successors, (3303), 2403 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 3303 transitions. [2022-11-03 02:00:21,890 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 3303 transitions. Word has length 160 [2022-11-03 02:00:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:21,891 INFO L495 AbstractCegarLoop]: Abstraction has 2404 states and 3303 transitions. [2022-11-03 02:00:21,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 3303 transitions. [2022-11-03 02:00:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:00:21,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:21,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:21,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:22,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 02:00:22,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-03 02:00:22,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:22,511 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash -994237313, now seen corresponding path program 1 times [2022-11-03 02:00:22,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:22,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11792059] [2022-11-03 02:00:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:22,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:22,515 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:22,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:00:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:23,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:00:23,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:25,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:35,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11792059] [2022-11-03 02:00:35,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11792059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [65567790] [2022-11-03 02:00:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:35,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:00:35,242 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:00:35,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:00:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:00:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:38,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:36,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [65567790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909640252] [2022-11-03 02:01:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:36,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:36,518 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:36,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:01:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:01:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:01:39,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:01:46,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909640252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:46,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:01:46,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:01:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910974860] [2022-11-03 02:01:46,811 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:01:46,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:01:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1630, Unknown=27, NotChecked=0, Total=1892 [2022-11-03 02:01:46,814 INFO L87 Difference]: Start difference. First operand 2404 states and 3303 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:51,654 INFO L93 Difference]: Finished difference Result 4974 states and 6851 transitions. [2022-11-03 02:01:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:01:51,655 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:01:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:51,668 INFO L225 Difference]: With dead ends: 4974 [2022-11-03 02:01:51,668 INFO L226 Difference]: Without dead ends: 4972 [2022-11-03 02:01:51,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 929 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=663, Invalid=4280, Unknown=27, NotChecked=0, Total=4970 [2022-11-03 02:01:51,671 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1871 mSDsluCounter, 8783 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 9042 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:51,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 9042 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 248 Unchecked, 0.1s Time] [2022-11-03 02:01:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2022-11-03 02:01:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4935. [2022-11-03 02:01:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 1.3785974868261046) internal successors, (6802), 4934 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 6802 transitions. [2022-11-03 02:01:51,811 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 6802 transitions. Word has length 160 [2022-11-03 02:01:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:51,812 INFO L495 AbstractCegarLoop]: Abstraction has 4935 states and 6802 transitions. [2022-11-03 02:01:51,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 6802 transitions. [2022-11-03 02:01:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:01:51,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:51,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:51,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:52,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-11-03 02:01:52,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:01:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:52,439 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1347325695, now seen corresponding path program 1 times [2022-11-03 02:01:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016623593] [2022-11-03 02:01:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:52,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:52,443 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:52,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:01:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:01:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:55,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:04,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:04,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016623593] [2022-11-03 02:02:04,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016623593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:04,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002437884] [2022-11-03 02:02:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:04,333 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:04,339 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:04,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:02:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:02:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:08,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:58,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2002437884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:58,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379854771] [2022-11-03 02:02:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:58,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:58,816 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:58,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:02:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:02:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:03:02,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:03:10,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379854771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:10,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:03:10,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:03:10,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827761256] [2022-11-03 02:03:10,313 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:03:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:03:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1630, Unknown=24, NotChecked=0, Total=1892 [2022-11-03 02:03:10,316 INFO L87 Difference]: Start difference. First operand 4935 states and 6802 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:15,675 INFO L93 Difference]: Finished difference Result 6931 states and 9576 transitions. [2022-11-03 02:03:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:03:15,676 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:03:15,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:15,697 INFO L225 Difference]: With dead ends: 6931 [2022-11-03 02:03:15,697 INFO L226 Difference]: Without dead ends: 6929 [2022-11-03 02:03:15,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 926 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=668, Invalid=4278, Unknown=24, NotChecked=0, Total=4970 [2022-11-03 02:03:15,700 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 2016 mSDsluCounter, 10846 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 11317 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:15,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2016 Valid, 11317 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 239 Unchecked, 0.1s Time] [2022-11-03 02:03:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6929 states. [2022-11-03 02:03:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6929 to 6775. [2022-11-03 02:03:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6775 states, 6774 states have (on average 1.382344257454975) internal successors, (9364), 6774 states have internal predecessors, (9364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6775 states to 6775 states and 9364 transitions. [2022-11-03 02:03:15,910 INFO L78 Accepts]: Start accepts. Automaton has 6775 states and 9364 transitions. Word has length 160 [2022-11-03 02:03:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:15,911 INFO L495 AbstractCegarLoop]: Abstraction has 6775 states and 9364 transitions. [2022-11-03 02:03:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 6775 states and 9364 transitions. [2022-11-03 02:03:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:03:15,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:15,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:15,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:16,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 02:03:16,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 02:03:16,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:16,539 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash 919055491, now seen corresponding path program 1 times [2022-11-03 02:03:16,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:16,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276911990] [2022-11-03 02:03:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:16,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:16,542 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:16,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:03:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:03:17,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:19,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:27,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:27,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276911990] [2022-11-03 02:03:27,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276911990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:27,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [958584029] [2022-11-03 02:03:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:27,923 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:27,924 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:27,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:03:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:29,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:03:29,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:31,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:27,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [958584029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118069741] [2022-11-03 02:04:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:27,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:27,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:27,436 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:27,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 02:04:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:04:28,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:38,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118069741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:38,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:38,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:04:38,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599759837] [2022-11-03 02:04:38,172 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:38,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:04:38,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:04:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1630, Unknown=24, NotChecked=0, Total=1892 [2022-11-03 02:04:38,174 INFO L87 Difference]: Start difference. First operand 6775 states and 9364 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:44,604 INFO L93 Difference]: Finished difference Result 10606 states and 14764 transitions. [2022-11-03 02:04:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 02:04:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:04:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:44,620 INFO L225 Difference]: With dead ends: 10606 [2022-11-03 02:04:44,620 INFO L226 Difference]: Without dead ends: 10604 [2022-11-03 02:04:44,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 927 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 71.0s TimeCoverageRelationStatistics Valid=767, Invalid=5061, Unknown=24, NotChecked=0, Total=5852 [2022-11-03 02:04:44,624 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 3960 mSDsluCounter, 7895 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3960 SdHoareTripleChecker+Valid, 8154 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:44,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3960 Valid, 8154 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 168 Unchecked, 0.0s Time] [2022-11-03 02:04:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10604 states. [2022-11-03 02:04:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10604 to 10366. [2022-11-03 02:04:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 1.3935359382537384) internal successors, (14444), 10365 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 14444 transitions. [2022-11-03 02:04:45,021 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 14444 transitions. Word has length 160 [2022-11-03 02:04:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:45,023 INFO L495 AbstractCegarLoop]: Abstraction has 10366 states and 14444 transitions. [2022-11-03 02:04:45,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 14444 transitions. [2022-11-03 02:04:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:04:45,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:45,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:45,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:45,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 02:04:45,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:45,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:45,654 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash -903425021, now seen corresponding path program 1 times [2022-11-03 02:04:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:45,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418738071] [2022-11-03 02:04:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:45,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:45,657 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:45,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:04:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:46,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:04:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:46,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:46,876 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418738071] [2022-11-03 02:04:46,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418738071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:46,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:46,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:04:46,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702500311] [2022-11-03 02:04:46,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:46,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:04:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:04:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:04:46,878 INFO L87 Difference]: Start difference. First operand 10366 states and 14444 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:47,464 INFO L93 Difference]: Finished difference Result 13984 states and 19056 transitions. [2022-11-03 02:04:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:04:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:04:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:47,486 INFO L225 Difference]: With dead ends: 13984 [2022-11-03 02:04:47,486 INFO L226 Difference]: Without dead ends: 13033 [2022-11-03 02:04:47,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:04:47,492 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 148 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:47,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1672 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-11-03 02:04:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13033 states. [2022-11-03 02:04:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13033 to 10478. [2022-11-03 02:04:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10478 states, 10477 states have (on average 1.3923833158346854) internal successors, (14588), 10477 states have internal predecessors, (14588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10478 states to 10478 states and 14588 transitions. [2022-11-03 02:04:47,832 INFO L78 Accepts]: Start accepts. Automaton has 10478 states and 14588 transitions. Word has length 160 [2022-11-03 02:04:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:47,832 INFO L495 AbstractCegarLoop]: Abstraction has 10478 states and 14588 transitions. [2022-11-03 02:04:47,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10478 states and 14588 transitions. [2022-11-03 02:04:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:04:47,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:47,846 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:47,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 02:04:48,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:48,072 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:48,072 INFO L85 PathProgramCache]: Analyzing trace with hash -243893499, now seen corresponding path program 1 times [2022-11-03 02:04:48,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:48,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539514683] [2022-11-03 02:04:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:48,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:48,075 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:48,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:04:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:04:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:51,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:04,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:04,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539514683] [2022-11-03 02:05:04,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539514683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:04,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143455503] [2022-11-03 02:05:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:04,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:04,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:04,382 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:04,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:05:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:06,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:05:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:08,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:08,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143455503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:08,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784027866] [2022-11-03 02:06:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:08,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:08,962 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:08,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:06:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:06:09,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:12,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:19,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784027866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:19,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:19,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:06:19,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832907953] [2022-11-03 02:06:19,608 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:19,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:06:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:06:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1625, Unknown=32, NotChecked=0, Total=1892 [2022-11-03 02:06:19,611 INFO L87 Difference]: Start difference. First operand 10478 states and 14588 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:24,922 INFO L93 Difference]: Finished difference Result 12649 states and 17583 transitions. [2022-11-03 02:06:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:06:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:06:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:24,944 INFO L225 Difference]: With dead ends: 12649 [2022-11-03 02:06:24,944 INFO L226 Difference]: Without dead ends: 12647 [2022-11-03 02:06:24,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 926 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=660, Invalid=4278, Unknown=32, NotChecked=0, Total=4970 [2022-11-03 02:06:24,950 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 2329 mSDsluCounter, 7660 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 7919 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:24,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 7919 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 223 Unchecked, 0.1s Time] [2022-11-03 02:06:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12647 states. [2022-11-03 02:06:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12647 to 12526. [2022-11-03 02:06:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12526 states, 12525 states have (on average 1.39249500998004) internal successors, (17441), 12525 states have internal predecessors, (17441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12526 states to 12526 states and 17441 transitions. [2022-11-03 02:06:25,364 INFO L78 Accepts]: Start accepts. Automaton has 12526 states and 17441 transitions. Word has length 160 [2022-11-03 02:06:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:25,364 INFO L495 AbstractCegarLoop]: Abstraction has 12526 states and 17441 transitions. [2022-11-03 02:06:25,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 12526 states and 17441 transitions. [2022-11-03 02:06:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:06:25,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:25,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:25,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:25,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-03 02:06:25,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:26,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:06:26,003 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2022487687, now seen corresponding path program 1 times [2022-11-03 02:06:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:26,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974962883] [2022-11-03 02:06:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:26,006 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:26,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:06:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:26,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:06:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:29,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:36,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974962883] [2022-11-03 02:06:36,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974962883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [319761003] [2022-11-03 02:06:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:36,887 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:36,888 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:36,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:06:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:06:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:41,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:44,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [319761003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:44,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151208512] [2022-11-03 02:07:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:44,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:44,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:44,587 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:44,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:07:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:07:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:07:48,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:07:55,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151208512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:55,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:55,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:07:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409082424] [2022-11-03 02:07:55,991 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:55,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:07:55,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:07:55,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1630, Unknown=27, NotChecked=0, Total=1892 [2022-11-03 02:07:55,994 INFO L87 Difference]: Start difference. First operand 12526 states and 17441 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:03,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:03,339 INFO L93 Difference]: Finished difference Result 30097 states and 42298 transitions. [2022-11-03 02:08:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:08:03,340 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:08:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:03,380 INFO L225 Difference]: With dead ends: 30097 [2022-11-03 02:08:03,381 INFO L226 Difference]: Without dead ends: 30095 [2022-11-03 02:08:03,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 923 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 78.2s TimeCoverageRelationStatistics Valid=660, Invalid=4283, Unknown=27, NotChecked=0, Total=4970 [2022-11-03 02:08:03,389 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1546 mSDsluCounter, 8302 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 8560 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:03,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 8560 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-11-03 02:08:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30095 states. [2022-11-03 02:08:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30095 to 29487. [2022-11-03 02:08:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29487 states, 29486 states have (on average 1.4072780302516448) internal successors, (41495), 29486 states have internal predecessors, (41495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29487 states to 29487 states and 41495 transitions. [2022-11-03 02:08:04,243 INFO L78 Accepts]: Start accepts. Automaton has 29487 states and 41495 transitions. Word has length 160 [2022-11-03 02:08:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:04,243 INFO L495 AbstractCegarLoop]: Abstraction has 29487 states and 41495 transitions. [2022-11-03 02:08:04,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 29487 states and 41495 transitions. [2022-11-03 02:08:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:08:04,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:04,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:04,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:04,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:04,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-03 02:08:04,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:04,856 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash 806333961, now seen corresponding path program 1 times [2022-11-03 02:08:04,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:04,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202381708] [2022-11-03 02:08:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:04,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:04,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:04,859 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:04,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:08:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:05,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:08:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:08,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:21,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202381708] [2022-11-03 02:08:21,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202381708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [370520258] [2022-11-03 02:08:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:21,149 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:21,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:21,150 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:21,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 02:08:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:08:22,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:25,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:24,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [370520258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:24,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58151226] [2022-11-03 02:09:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:24,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:24,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:24,171 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:24,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 02:09:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:09:24,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:09:27,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:09:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58151226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:35,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:35,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:09:35,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766907316] [2022-11-03 02:09:35,728 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:35,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:09:35,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:35,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:09:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1628, Unknown=28, NotChecked=0, Total=1892 [2022-11-03 02:09:35,730 INFO L87 Difference]: Start difference. First operand 29487 states and 41495 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:43,661 INFO L93 Difference]: Finished difference Result 46967 states and 66445 transitions. [2022-11-03 02:09:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:09:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:09:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:43,696 INFO L225 Difference]: With dead ends: 46967 [2022-11-03 02:09:43,696 INFO L226 Difference]: Without dead ends: 46965 [2022-11-03 02:09:43,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 924 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 79.8s TimeCoverageRelationStatistics Valid=666, Invalid=4276, Unknown=28, NotChecked=0, Total=4970 [2022-11-03 02:09:43,702 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 2232 mSDsluCounter, 6847 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2232 SdHoareTripleChecker+Valid, 7099 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:43,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2232 Valid, 7099 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 352 Unchecked, 0.1s Time] [2022-11-03 02:09:43,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46965 states. [2022-11-03 02:09:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46965 to 46468. [2022-11-03 02:09:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 1.4172208233800332) internal successors, (65854), 46467 states have internal predecessors, (65854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 65854 transitions. [2022-11-03 02:09:44,933 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 65854 transitions. Word has length 160 [2022-11-03 02:09:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:44,934 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 65854 transitions. [2022-11-03 02:09:44,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 65854 transitions. [2022-11-03 02:09:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:09:44,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:44,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:44,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:45,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-03 02:09:45,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-03 02:09:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:45,551 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 419456645, now seen corresponding path program 1 times [2022-11-03 02:09:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:45,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183486477] [2022-11-03 02:09:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:45,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:45,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:45,554 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:45,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:09:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:46,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:46,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:46,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:46,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:46,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183486477] [2022-11-03 02:09:46,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183486477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:46,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:46,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457364496] [2022-11-03 02:09:46,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:46,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:46,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:46,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:46,707 INFO L87 Difference]: Start difference. First operand 46468 states and 65854 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:48,863 INFO L93 Difference]: Finished difference Result 87762 states and 123805 transitions. [2022-11-03 02:09:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:48,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:09:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:48,924 INFO L225 Difference]: With dead ends: 87762 [2022-11-03 02:09:48,924 INFO L226 Difference]: Without dead ends: 81103 [2022-11-03 02:09:48,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:09:48,940 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 503 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:48,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1910 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-11-03 02:09:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81103 states. [2022-11-03 02:09:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81103 to 46468. [2022-11-03 02:09:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 1.4165321626100242) internal successors, (65822), 46467 states have internal predecessors, (65822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 65822 transitions. [2022-11-03 02:09:50,999 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 65822 transitions. Word has length 160 [2022-11-03 02:09:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:51,000 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 65822 transitions. [2022-11-03 02:09:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 65822 transitions. [2022-11-03 02:09:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:09:51,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:51,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:51,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:51,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:51,216 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash -862715641, now seen corresponding path program 1 times [2022-11-03 02:09:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152353165] [2022-11-03 02:09:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:51,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:51,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:51,221 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:51,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:09:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:52,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:52,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:52,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:52,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152353165] [2022-11-03 02:09:52,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152353165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:52,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:52,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:52,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542079212] [2022-11-03 02:09:52,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:52,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:52,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:52,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:52,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:52,349 INFO L87 Difference]: Start difference. First operand 46468 states and 65822 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:54,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:54,412 INFO L93 Difference]: Finished difference Result 66436 states and 92751 transitions. [2022-11-03 02:09:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:09:54,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:54,455 INFO L225 Difference]: With dead ends: 66436 [2022-11-03 02:09:54,455 INFO L226 Difference]: Without dead ends: 63329 [2022-11-03 02:09:54,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:09:54,467 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 270 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:54,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1616 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 02:09:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63329 states. [2022-11-03 02:09:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63329 to 46468. [2022-11-03 02:09:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 1.4154991714550111) internal successors, (65774), 46467 states have internal predecessors, (65774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 65774 transitions. [2022-11-03 02:09:55,937 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 65774 transitions. Word has length 160 [2022-11-03 02:09:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:55,938 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 65774 transitions. [2022-11-03 02:09:55,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 65774 transitions. [2022-11-03 02:09:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:09:55,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:55,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:55,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:56,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:56,178 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:56,179 INFO L85 PathProgramCache]: Analyzing trace with hash -878234359, now seen corresponding path program 1 times [2022-11-03 02:09:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:56,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828939638] [2022-11-03 02:09:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:56,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:56,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:56,181 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:56,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:09:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:57,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:09:57,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:00,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:14,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828939638] [2022-11-03 02:10:14,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828939638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912220773] [2022-11-03 02:10:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:14,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:14,193 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:14,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bb0da89-c53e-4e5a-9d8d-b4e209566c50/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 02:10:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:10:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:18,839 INFO L328 TraceCheckSpWp]: Computing backward predicates...